ATASCOSA COUNTY, TEXAS
PRODUCTION DATA INFORMATION FOR IN ATASCOSA COUNTY TEXAS
PARTICIPATING OPERATORS
HAWN BROTHERS FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC.
BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP.
H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC.
DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD.
PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS
RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN
DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY
CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC
SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY
PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC.
CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION
ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES
CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY
SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION
PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY
BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC.
HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP.
M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY
LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION
TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C.
MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY
XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY
LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING
TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO.
SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY
TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP.
SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION
CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC.
WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC.
ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE
CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP.
HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC.
GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC.
PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON
NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION
ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC.
NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC.
BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC.
URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W.
ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO.
HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP.
CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C.
ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD.
COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY
EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC.
PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC.
SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC.
DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP.
SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC.
HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS
DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC
RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS
LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC.
LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC
HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION
CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT
CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC.
THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY
BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY
SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE
LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE
HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP.
KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY
STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP.
REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC.
HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC
FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS
MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY
SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC.
CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC.
M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO.
WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY
VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION
ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS
RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP.
CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD
ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC.
OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC.
TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION
HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY
TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY
ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC.
CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY
PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP.
PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L.
PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G.
CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS
ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO
TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC.
WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC.
JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC.
PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC.
ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S.
TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC.
WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC
MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC.
TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION
VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX
PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC.
LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP.
ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC.
DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC.
VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC.
SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC.
SUN EXPL. & PROD. CO.-HOUSTON DORAN, W. H., JR. FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY
GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC
HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION
J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC.
ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP.
BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY
KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC.
RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION
SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E.
CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC.
J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY
ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L.
C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC.
NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC.
BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC.
DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P.
NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC.
MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC.
HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC.
APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING
STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC
GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY
ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC.
SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED
TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION
FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO.
SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC
NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC
FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION
VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC.
PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC.
EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION
JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY
BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S.
SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC
GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC.
PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC.
CONOCO INC. BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC.
CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL
CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC.
PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC.
FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM
TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC.
GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC.
MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC.
SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY
AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J.
SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO.
RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC.
CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS
SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO.
C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC.
SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION
AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP.
WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC.
ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC.
PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P.
KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION
TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC.
G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC.
SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION
CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC.
INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY
VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC.
FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC.
NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C.
AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD.
PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO.
SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC.
CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC.
SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY
PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC.
KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO.
MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC.
PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO.
BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC.
NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC.
C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION
GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY
TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION
MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY
GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V.
DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC.
REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC.
BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY
BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS
SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP.
PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED
QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC.
B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC.
AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC.
LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY
PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC.
HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO.
JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY
ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP.
DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P.
MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION
STX PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP.
REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY
PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN
DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION
HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC
WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR
MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON STRAHAN, J. A. FLAG-REDFERN OIL COMPANY
RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP
EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY
MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP.
CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC
CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC.
MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O.
J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP.
TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC.
CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC.
LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION
RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP.
STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC.
PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY
CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC.
ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC.
EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY
FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION
SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION
PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC.
GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP.
ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY
SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP
EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO.
ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP.
EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP.
K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC.
HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY
LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC.
BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD.
EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE
TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL
PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL
MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY
SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY
MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC.
ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY
CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC. WEN-BE
LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC.
R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY
AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP.
ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY
S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC.
HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY
MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC.
FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM
EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC
BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC.
BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC.
DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC.
ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC.
SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION
K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC.
MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC.
TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC.
PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC.
SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY
EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J.
RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC.
S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC.
SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY
WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC.
GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC.
HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD.
TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION
NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION
HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC
BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC.
HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE
DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC.
LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC.
SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES
GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO.
CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC
CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN
DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION
BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC.
MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC.
RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC.
SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY
DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS
COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR.
DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC.
UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO.
OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC.
ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C.
MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL
K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R.
PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C.
FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO
NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP.
BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC.
GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO.
DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS
BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO.
HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K.
PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO.
FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC.
STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON J. D. PRODUCTION
EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC.
SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO.
HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP.
PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K.
GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD.
BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON PATHFINDER PETROLEUM, INC.
FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC.
EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY
GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO.
ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC.
CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC.
EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC.
TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION
TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY
RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES
PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC.
STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C.
SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC.
FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO.
D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC.
REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N.
CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD.
HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC.
EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A)
LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP.
P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY
EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC.
ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC
COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD.
AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC.
QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION
HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C.
MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC.
KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO.
PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC
PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND
WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION
CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY
CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC.
LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC.
MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO.
PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC.
WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC.
WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC.
N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC.
WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY
ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G.
TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC.
LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC
H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC
AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC.
TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED
COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC.
MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY
PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC.
MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION
BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC.
SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC.
MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION
COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT.
LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC.
RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC.
ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R.
HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY
LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC
CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY
BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO.
SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS
ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION
HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC.
SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY
AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY
CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA
SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC.
WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC.
PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC.
HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J.
ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY
KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC
EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP.
HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY
INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC.
KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP.
MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC.
FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY
KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY
HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY
WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY
PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC
LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC.
AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A)
LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY
HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD.
BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC.
PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR.
SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC.
PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC.
RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE
JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC.
R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A.
TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO.
BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY
READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC.
DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON
J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN
DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC
WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC.
ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC.
STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I.
KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON
NORTH AMERICAN PRODUCTION CO. FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC.
BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP.
H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC.
DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD.
PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS
RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN
DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY
CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC
SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY
PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC.
CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION
ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES
CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY
SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION
PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY
BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC.
HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP.
M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY
LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION
TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C.
MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY
XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY
LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING
TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO.
SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY
TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP.
SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION
CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC.
WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC.
ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE
CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP.
HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC.
GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC.
PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON
NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION
ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC.
NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC.
BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC.
URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W.
ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO.
HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP.
CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C.
ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD.
COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY
EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC.
PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC.
SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC.
DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP.
SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC.
HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS
DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC
RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS
LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC.
LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC
HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION
CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT
CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC.
THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY
BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY
SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE
LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE
HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP.
KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY
STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP.
REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC.
HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC
FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS
MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY
SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC.
CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC.
M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO.
WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY
VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION
ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS
RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP.
CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD
ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC.
OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC.
TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION
HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY
TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY
ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC.
CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY
PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP.
PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L.
PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G.
CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS
ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO
TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC.
WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC.
JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC.
PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC.
ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S.
TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC.
WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC
MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC.
TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION
VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX
PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC.
LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP.
ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC.
DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC.
VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC.
SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC.
SUN EXPL. & PROD. CO.-HOUSTON NATIONAL PETROLEUM CO. FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY
GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC
HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION
J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC.
ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP.
BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY
KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC.
RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION
SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E.
CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC.
J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY
ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L.
C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC.
NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC.
BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC.
DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P.
NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC.
MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC.
HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC.
APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING
STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC
GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY
ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC.
SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED
TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION
FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO.
SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC
NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC
FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION
VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC.
PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC.
EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION
JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY
BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S.
SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC
GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC.
PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC.
CONOCO INC. BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC.
CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL
CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC.
PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC.
FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM
TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC.
GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC.
MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC.
SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY
AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J.
SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO.
RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC.
CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS
SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO.
C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC.
SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION
AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP.
WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC.
ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC.
PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P.
KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION
TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC.
G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC.
SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION
CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC.
INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY
VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC.
FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC.
NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C.
AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD.
PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO.
SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC.
CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC.
SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY
PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC.
KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO.
MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC.
PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO.
BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC.
NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC.
C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION
GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY
TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION
MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY
GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V.
DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC.
REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC.
BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY
BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS
SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP.
PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED
QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC.
B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC.
AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC.
LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY
PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC.
HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO.
JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY
ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP.
DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P.
MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION
STX PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP.
REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY
PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN
DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION
HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC
WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR
MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON LONE STAR PROD. CO. FLAG-REDFERN OIL COMPANY
RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP
EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY
MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP.
CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC
CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC.
MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O.
J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP.
TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC.
CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC.
LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION
RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP.
STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC.
PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY
CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC.
ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC.
EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY
FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION
SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION
PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC.
GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP.
ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY
SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP
EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO.
ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP.
EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP.
K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC.
HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY
LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC.
BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD.
EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE
TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL
PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL
MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY
SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY
MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC.
ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY
CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC. WEN-BE
LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC.
R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY
AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP.
ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY
S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC.
HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY
MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC.
FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM
EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC
BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC.
BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC.
DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC.
ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC.
SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION
K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC.
MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC.
TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC.
PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC.
SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY
EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J.
RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC.
S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC.
SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY
WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC.
GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC.
HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD.
TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION
NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION
HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC
BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC.
HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE
DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC.
LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC.
SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES
GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO.
CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC
CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN
DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION
BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC.
MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC.
RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC.
SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY
DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS
COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR.
DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC.
UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO.
OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC.
ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C.
MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL
K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R.
PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C.
FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO
NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP.
BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC.
GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO.
DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS
BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO.
HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K.
PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO.
FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC.
STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON J. D. PRODUCTION
EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC.
SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO.
HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP.
PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K.
GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD.
BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON HILLIER, J. E.
FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC.
EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY
GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO.
ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC.
CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC.
EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC.
TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION
TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY
RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES
PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC.
STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C.
SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC.
FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO.
D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC.
REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N.
CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD.
HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC.
EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A)
LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP.
P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY
EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC.
ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC
COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD.
AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC.
QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION
HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C.
MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC.
KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO.
PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC
PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND
WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION
CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY
CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC.
LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC.
MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO.
PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC.
WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC.
WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC.
N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC.
WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY
ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G.
TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC.
LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC
H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC
AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC.
TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED
COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC.
MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY
PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC.
MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION
BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC.
SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC.
MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION
COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT.
LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC.
RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC.
ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R.
HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY
LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC
CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY
BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO.
SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS
ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION
HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC.
SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY
AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY
CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA
SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC.
WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC.
PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC.
HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J.
ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY
KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC
EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP.
HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY
INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC.
KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP.
MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC.
FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY
KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY
HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY
WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY
PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC
LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC.
AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A)
LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY
HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD.
BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC.
PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR.
SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC.
PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC.
RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE
JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC.
R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A.
TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO.
BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY
READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC.
DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON
J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN
DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC
WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC.
ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC.
STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I.
KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON
HUGHES & HUGHES FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC.
BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP.
H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC.
DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD.
PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS
RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN
DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY
CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC
SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY
PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC.
CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION
ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES
CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY
SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION
PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY
BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC.
HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP.
M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY
LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION
TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C.
MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY
XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY
LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING
TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO.
SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY
TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP.
SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION
CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC.
WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC.
ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE
CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP.
HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC.
GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC.
PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON
NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION
ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC.
NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC.
BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC.
URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W.
ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO.
HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP.
CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C.
ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD.
COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY
EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC.
PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC.
SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC.
DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP.
SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC.
HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS
DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC
RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS
LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC.
LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC
HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION
CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT
CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC.
THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY
BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY
SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE
LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE
HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP.
KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY
STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP.
REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC.
HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC
FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS
MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY
SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC.
CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC.
M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO.
WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY
VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION
ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS
RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP.
CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD
ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC.
OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC.
TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION
HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY
TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY
ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC.
CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY
PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP.
PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L.
PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G.
CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS
ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO
TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC.
WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC.
JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC.
PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC.
ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S.
TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC.
WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC
MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC.
TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION
VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX
PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC.
LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP.
ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC.
DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC.
VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC.
SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC.
SUN EXPL. & PROD. CO.-HOUSTON PAN AMERICAN PETROLEUM CORP. FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY
GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC
HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION
J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC.
ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP.
BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY
KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC.
RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION
SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E.
CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC.
J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY
ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L.
C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC.
NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC.
BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC.
DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P.
NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC.
MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC.
HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC.
APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING
STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC
GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY
ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC.
SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED
TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION
FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO.
SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC
NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC
FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION
VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC.
PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC.
EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION
JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY
BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S.
SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC
GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC.
PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC.
CONOCO INC. BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC.
CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL
CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC.
PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC.
FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM
TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC.
GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC.
MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC.
SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY
AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J.
SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO.
RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC.
CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS
SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO.
C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC.
SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION
AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP.
WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC.
ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC.
PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P.
KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION
TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC.
G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC.
SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION
CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC.
INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY
VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC.
FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC.
NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C.
AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD.
PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO.
SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC.
CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC.
SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY
PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC.
KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO.
MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC.
PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO.
BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC.
NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC.
C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION
GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY
TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION
MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY
GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V.
DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC.
REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC.
BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY
BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS
SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP.
PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED
QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC.
B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC.
AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC.
LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY
PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC.
HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO.
JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY
ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP.
DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P.
MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION
STX PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP.
REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY
PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN
DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION
HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC
WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR
MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON CARR, F. WILLIAM FLAG-REDFERN OIL COMPANY
RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP
EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY
MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP.
CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC
CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC.
MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O.
J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP.
TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC.
CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC.
LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION
RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP.
STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC.
PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY
CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC.
ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC.
EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY
FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION
SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION
PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC.
GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP.
ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY
SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP
EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO.
ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP.
EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP.
K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC.
HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY
LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC.
BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD.
EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE
TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL
PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL
MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY
SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY
MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC.
ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY
CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC. WEN-BE
LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC.
R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY
AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP.
ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY
S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC.
HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY
MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC.
FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM
EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC
BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC.
BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC.
DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC.
ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC.
SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION
K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC.
MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC.
TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC.
PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC.
SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY
EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J.
RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC.
S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC.
SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY
WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC.
GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC.
HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD.
TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION
NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION
HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC
BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC.
HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE
DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC.
LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC.
SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES
GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO.
CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC
CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN
DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION
BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC.
MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC.
RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC.
SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY
DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS
COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR.
DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC.
UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO.
OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC.
ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C.
MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL
K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R.
PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C.
FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO
NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP.
BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC.
GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO.
DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS
BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO.
HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K.
PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO.
FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC.
STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON J. D. PRODUCTION
EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC.
SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO.
HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP.
PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K.
GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD.
BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON TENNECO OIL CO.
FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC.
EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY
GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO.
ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC.
CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC.
EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC.
TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION
TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY
RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES
PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC.
STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C.
SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC.
FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO.
D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC.
REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N.
CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD.
HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC.
EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A)
LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP.
P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY
EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC.
ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC
COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD.
AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC.
QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION
HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C.
MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC.
KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO.
PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC
PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND
WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION
CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY
CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC.
LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC.
MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO.
PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC.
WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC.
WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC.
N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC.
WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY
ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G.
TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC.
LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC
H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC
AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC.
TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED
COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC.
MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY
PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC.
MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION
BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC.
SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC.
MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION
COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT.
LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC.
RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC.
ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R.
HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY
LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC
CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY
BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO.
SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS
ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION
HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC.
SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY
AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY
CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA
SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC.
WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC.
PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC.
HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J.
ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY
KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC
EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP.
HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY
INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC.
KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP.
MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC.
FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY
KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY
HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY
WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY
PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC
LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC.
AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A)
LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY
HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD.
BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC.
PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR.
SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC.
PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC.
RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE
JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC.
R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A.
TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO.
BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY
READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC.
DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON
J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN
DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC
WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC.
ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC.
STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I.
KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON
CORDER, KNOX FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC.
BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP.
H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC.
DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD.
PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS
RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN
DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY
CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC
SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY
PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC.
CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION
ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES
CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY
SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION
PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY
BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC.
HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP.
M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY
LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION
TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C.
MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY
XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY
LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING
TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO.
SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY
TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP.
SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION
CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC.
WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC.
ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE
CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP.
HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC.
GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC.
PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON
NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION
ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC.
NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC.
BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC.
URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W.
ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO.
HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP.
CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C.
ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD.
COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY
EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC.
PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC.
SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC.
DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP.
SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC.
HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS
DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC
RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS
LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC.
LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC
HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION
CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT
CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC.
THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY
BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY
SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE
LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE
HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP.
KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY
STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP.
REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC.
HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC
FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS
MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY
SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC.
CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC.
M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO.
WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY
VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION
ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS
RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP.
CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD
ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC.
OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC.
TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION
HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY
TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY
ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC.
CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY
PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP.
PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L.
PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G.
CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS
ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO
TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC.
WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC.
JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC.
PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC.
ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S.
TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC.
WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC
MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC.
TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION
VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX
PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC.
LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP.
ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC.
DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC.
VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC.
SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC.
SUN EXPL. & PROD. CO.-HOUSTON PARKER, GEORGE FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY
GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC
HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION
J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC.
ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP.
BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY
KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC.
RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION
SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E.
CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC.
J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY
ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L.
C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC.
NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC.
BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC.
DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P.
NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC.
MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC.
HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC.
APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING
STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC
GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY
ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC.
SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED
TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION
FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO.
SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC
NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC
FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION
VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC.
PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC.
EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION
JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY
BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S.
SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC
GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC.
PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC.
CONOCO INC. BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC.
CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL
CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC.
PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC.
FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM
TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC.
GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC.
MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC.
SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY
AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J.
SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO.
RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC.
CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS
SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO.
C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC.
SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION
AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP.
WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC.
ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC.
PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P.
KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION
TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC.
G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC.
SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION
CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC.
INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY
VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC.
FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC.
NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C.
AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD.
PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO.
SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC.
CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC.
SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY
PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC.
KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO.
MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC.
PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO.
BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC.
NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC.
C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION
GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY
TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION
MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY
GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V.
DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC.
REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC.
BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY
BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS
SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP.
PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED
QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC.
B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC.
AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC.
LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY
PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC.
HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO.
JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY
ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP.
DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P.
MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION
STX PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP.
REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY
PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN
DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION
HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC
WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR
MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON EXXON CORP. FLAG-REDFERN OIL COMPANY
RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP
EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY
MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP.
CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC
CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC.
MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O.
J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP.
TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC.
CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC.
LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION
RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP.
STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC.
PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY
CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC.
ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC.
EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY
FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION
SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION
PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC.
GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP.
ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY
SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP
EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO.
ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP.
EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP.
K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC.
HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY
LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC.
BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD.
EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE
TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL
PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL
MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY
SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY
MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC.
ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY
CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC. WEN-BE
LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC.
R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY
AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP.
ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY
S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC.
HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY
MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC.
FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM
EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC
BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC.
BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC.
DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC.
ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC.
SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION
K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC.
MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC.
TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC.
PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC.
SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY
EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J.
RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC.
S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC.
SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY
WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC.
GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC.
HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD.
TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION
NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION
HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC
BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC.
HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE
DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC.
LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC.
SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES
GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO.
CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC
CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN
DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION
BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC.
MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC.
RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC.
SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY
DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS
COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR.
DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC.
UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO.
OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC.
ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C.
MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL
K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R.
PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C.
FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO
NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP.
BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC.
GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO.
DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS
BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO.
HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K.
PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO.
FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC.
STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON J. D. PRODUCTION
EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC.
SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO.
HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP.
PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K.
GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD.
BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON AMOCO PRODUCTION COMPANY
FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC.
EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY
GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO.
ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC.
CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC.
EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC.
TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION
TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY
RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES
PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC.
STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C.
SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC.
FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO.
D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC.
REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N.
CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD.
HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC.
EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A)
LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP.
P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY
EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC.
ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC
COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD.
AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC.
QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION
HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C.
MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC.
KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO.
PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC
PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND
WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION
CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY
CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC.
LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC.
MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO.
PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC.
WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC.
WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC.
N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC.
WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY
ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G.
TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC.
LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC
H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC
AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC.
TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED
COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC.
MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY
PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC.
MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION
BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC.
SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC.
MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION
COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT.
LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC.
RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC.
ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R.
HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY
LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC
CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY
BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO.
SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS
ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION
HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC.
SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY
AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY
CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA
SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC.
WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC.
PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC.
HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J.
ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY
KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC
EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP.
HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY
INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC.
KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP.
MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC.
FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY
KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY
HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY
WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY
PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC
LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC.
AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A)
LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY
HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD.
BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC.
PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR.
SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC.
PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC.
RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE
JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC.
R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A.
TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO.
BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY
READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC.
DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON
J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN
DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC
WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC.
ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC.
STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I.
KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON
ATLANTIC RICHFIELD CO. FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC.
BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP.
H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC.
DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD.
PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS
RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN
DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY
CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC
SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY
PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC.
CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION
ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES
CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY
SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION
PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY
BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC.
HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP.
M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY
LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION
TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C.
MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY
XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY
LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING
TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO.
SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY
TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP.
SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION
CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC.
WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC.
ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE
CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP.
HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC.
GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC.
PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON
NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION
ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC.
NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC.
BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC.
URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W.
ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO.
HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP.
CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C.
ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD.
COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY
EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC.
PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC.
SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC.
DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP.
SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC.
HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS
DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC
RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS
LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC.
LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC
HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION
CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT
CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC.
THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY
BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY
SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE
LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE
HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP.
KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY
STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP.
REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC.
HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC
FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS
MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY
SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC.
CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC.
M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO.
WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY
VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION
ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS
RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP.
CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD
ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC.
OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC.
TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION
HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY
TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY
ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC.
CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY
PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP.
PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L.
PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G.
CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS
ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO
TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC.
WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC.
JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC.
PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC.
ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S.
TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC.
WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC
MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC.
TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION
VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX
PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC.
LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP.
ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC.
DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC.
VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC.
SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC.
SUN EXPL. & PROD. CO.-HOUSTON MOBIL OIL CORPORATION FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY
GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC
HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION
J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC.
ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP.
BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY
KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC.
RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION
SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E.
CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC.
J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY
ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L.
C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC.
NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC.
BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC.
DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P.
NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC.
MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC.
HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC.
APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING
STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC
GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY
ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC.
SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED
TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION
FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO.
SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC
NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC
FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION
VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC.
PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC.
EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION
JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY
BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S.
SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC
GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC.
PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC.
CONOCO INC. BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC.
CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL
CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC.
PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC.
FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM
TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC.
GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC.
MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC.
SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY
AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J.
SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO.
RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC.
CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS
SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO.
C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC.
SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION
AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP.
WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC.
ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC.
PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P.
KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION
TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC.
G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC.
SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION
CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC.
INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY
VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC.
FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC.
NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C.
AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC BREWSTER, EMPIRE, LTD.
PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO.
SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC.
CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC.
SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY
PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC.
KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO. CALK OPERATING CO.
MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC CHARRO PETROLEUM, INC.
PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN DILLEY PRODUCTION CO.
BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC.
NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC. MID-TEXAS RESOURCES, INC.
C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION
GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC. SOMEX ENERGY COMPANY
TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION
MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY
GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V.
DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC. UNITED PET. DISTRIBUTORS, INC.
REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO. OSYKA OIL & GAS, INC.
BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY
BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C. MIL AIR OIL & GAS
SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL K-N OPERATING CORP.
PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R. PETREX INCORPORATED
QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC.
B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC.
AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP. BMW RESOURCES, INC.
LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY
PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC.
HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS BALCONES OIL CO.
JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY
ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K. PETROLIA DRILLING CORP.
DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO. FOSTER, W.P.
MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION
STX PERRYMAN & MURCHISON J. D. PRODUCTION EVERGREEN ENERGY CORP.
REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY
PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN
DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION
HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K. GREAT BAY OPERATIONS, LLC
WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR
MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON SHELL OIL COMPANY FLAG-REDFERN OIL COMPANY
RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP
EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY GUINN OPERATING COMPANY
MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP.
CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC
CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC. EOG RESOURCES, INC.
MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC. TURNER, M. O.
J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP.
TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY RAINER ENERGY, INC.
CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES PNP PETROLEUM, INC.
LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION
RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP.
STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC. FAIR, RALPH E. INC.
PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY
CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC. REH ENERGY, INC.
ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N. CHESAPEAKE OPERATING, INC.
EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY
FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC. EXPORT PETROLEUM CORPORATION
SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION
PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC.
GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP.
ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC. ENERGY EQUITY COMPANY
SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP
EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO.
ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC. QUINTANA PET. CORP.
EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION HUNT ENERGY CORP.
K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C. MG EXPLORATION, INC.
HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY
LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO. PETRUS OPERATING CO., INC.
BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC PINNERGY, LTD.
EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND WELHAUSEN COMPANY, THE
TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL
PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL
MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY
SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC. MANTI OPERATING COMPANY
MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC.
ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY
CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC. WEN-BE
LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC.
R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC. WAYNE OIL COMPANY
AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP.
ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G. TRACE OIL & GAS COMPANY
S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC. LITTLE OIL & GAS, INC.
HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY
MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC.
FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM
EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC
BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC.
BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY PRIMARY FUELS, INC.
DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC.
ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC.
SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION
K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC. MIL AIR OIL CO., INC.
MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC.
TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC.
PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC. RIO-TEX, INC.
SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY
EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R. HOWARD, DOUGLAS J.
RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY LAJET, INC.
S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC CAL-WACO OIL CO. INC.
SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY
WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC.
GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC.
HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD.
TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC. SAN PATRICIO CORPORATION
NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY AOP OPERATING CORPORATION
HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY CJ ENERGY, LLC
BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA SAMS EXPLORATION, INC.
HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC. WISER OIL COMPANY, THE
DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC. PETROLEUM UNLIMITED, INC.
LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC. HAYDEN OIL CO., INC.
SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J. ELLSWORTH, H. P. O&G PROPERTIES
GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY KIMBY OPERATING CO.
CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC EDCO PRODUCTION INC
CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP. HERRERA, MARTIN
DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY INCO INVESTMENTS CORPORATION
BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC. KELPETRO, INC.
MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP. MID-CONTINENTAL PETROLEUM, INC.
RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC. FAR, INC.
SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY KIMBERJAY OIL & GAS COMPANY
DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY HARVEY BROTHERS OIL & GAS
COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY WIMMER, ARTHUR LLOYD, JR.
DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY PEDECO, INC.
UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC LANG EXPLORATION CO.
OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC. AMERICAN GULF ENERGY, INC.
ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A) LONG, JOHN M., L.C.
MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY HAILEY OIL
K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD. BENSON, W. R.
PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC. PETROLEUM CAPITAL, L.C.
FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR. SOUTHERN ENERGY & EXPLORATION CO
NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC. PETROLERO CORP.
BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC. RAY JR. CO., INC.
GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE JADE OPERATING CO.
DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC. R-A-R INTERESTS
BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A. TEXAS & GREAT WESTERN OIL CO.
HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO. BLUMBERG, ROLAND K.
PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY READING & BATES OIL AND GAS CO.
FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC. DURANGO PRODUCTION COMPANY, INC.
STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON J. D. PRODUCTION
EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN DESERT RESOURCES, INC.
SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC WINDSOR PRODUCING CO.
HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC. ESENJAY PETROLEUM CORP.
PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC. STOKES, O. K.
GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I. KILLAM & HURD, LTD.
BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON UNION OIL COMPANY OF CALIFORNIA
FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC. BARNES-HOLDER, INC.
EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP. H. & J. DRILLING COMPANY
GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC. DIXIE EXPLORATION CO.
ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD. PIONEER NATURAL RES. USA, INC.
CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS RAINBOW MINERALS, INC.
EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN DORCHESTER EXPLORATION, INC.
TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY CABOT OIL & GAS CORPORATION
TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC SPAIN OIL COMPANY
RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY PAISANO RESOURCES
PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC. CHRISTIE ENERGY CO., INC.
STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION ZAPATA-FENDER, L. L. C.
SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES CHEVRON U. S. A. INC.
FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY SUE-ANN OPERATING CO.
D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION PROTEUS PETROLEUM INC.
REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY BLAIR, JACK N.
CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC. HARRISON INTERESTS, LTD.
HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP. M. J. G., INC.
EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY LIVINGSTON COMPANY, THE (A)
LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION TEXAS EMPIRE PETROLEUM CORP.
P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C. MATADOR PRODUCTION COMPANY
EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY XTO ENERGY INC.
ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY LONE STAR NATURAL RESOURCES, INC
COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING TEAL EXPLORATION, LTD.
AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO. SABRE OPERATING, INC.
QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY TRIAD ENERGY CORPORATION
HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP. SUE-ANN OPERATING, L.C.
MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION CARTER, J.E. ENERGY, INC.
KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC. WAGNER, DUER & CO.
PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC. ENSERCH EXPLORATION, INC
PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE CORSICANA FIELD FUND
WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP. HAWKEN ENERGY CORPORATION
CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC. GRANDE OPERATING & EXPL. COMPANY
CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC. PEARL, BILL H. PRODUCTIONS, INC.
LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON NOD, INC.
MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION ESCONDIDO ENTERPRISES CO.
PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC. NORTH AMERICAN OIL & GAS, INC.
WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC. BALCONES OIL CO., INC.
WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC. URSA PETROLEUM CO., INC.
N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W. ZOOM, INC.
WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO. HOLLUB, LAMBERT DRILLING COMPANY
ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP. CATLETT, E. G.
TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C. ATASCO, INC.
LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD. COMPLETE VACUUM AND RENTAL INC
H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY EAGLE FORD ENVIRO. SERVICES, LLC
AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC. PETROL CONSORTIUM, INC.
TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC. SEEKER OIL COMPANY, INCORPORATED
COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC. DORRIS PETROLEUM, INC.
MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP. SOMERSET OIL COMPANY
PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC. HOUTEX PETROLEUM, INC.
MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS DEWBRE PETROLEUM CORPORATION
BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC RIVER RESOURCES, INC.
SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS LONGHORN GAS CO., INC.
MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC. LABELLE CORPORATION
COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC HARRIS, LLOYD A. OPERATING ACCT.
LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION CUDE PETROLEUM, INC.
RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT CORPUS CHRISTI LEASEHOLDS, INC.
ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC. THORNE, JAMES R.
HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY BAY ROCK OPERATING COMPANY
LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY SNG OPERATING, LLC
CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE LITTLE OAK OIL COMPANY
BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE HELTZEL DRILLING&EXPLORATION CO.
SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP. KIMBELL OIL COMPANY OF TEXAS
ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY STANDARD ENERGY CORPORATION
HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC. FILON EXPLORATION CORP. REGAL MANAGEMENT, INC.
SAN PATRICIO CORPORATION NIMROD EXPLORATION, INC. NORWEGIAN CONSORTIUM INC. HARKINS & COMPANY
AOP OPERATING CORPORATION HUNTINGTON ENERGY, L.L.C. AURORA USA DEVELOPMENT, LLC FAIR ENERGY
CJ ENERGY, LLC BREWSTER, EMPIRE, LTD. PECAN GAP OIL & GAS MURPHY EXPL. & PROD. CO. - USA
SAMS EXPLORATION, INC. HAMILTON BROTHERS OIL CO. SPIRIT PETROLEUM COMPANY SHANNON OIL & GAS, INC.
WISER OIL COMPANY, THE DEEP ROCK RESOURCES, INC. CES SWD TEXAS, INC. CIRCLE SEVEN OIL & GAS, INC.
PETROLEUM UNLIMITED, INC. LAURITZEN ENERGY, INC. SOMERSET INSULATION INC. M-RAY PETROLEUM, INC.
HAYDEN OIL CO., INC. SIERRA EXPLORATION COMPANY PLAINS PETROLEUM OPERATING CO. WOFFORD, C. J.
ELLSWORTH, H. P. O&G PROPERTIES GSI OIL & GAS, INC. KIRKWOOD & COMPANY VIRTEX PETROLEUM COMPANY
KIMBY OPERATING CO. CALK OPERATING CO. MCA PETROLEUM CORPORATION ATASCOSA EXPLORATION, LLC
EDCO PRODUCTION INC CHARRO PETROLEUM, INC. PROLIJO INVESTMENTS RICKAWAY ENERGY, CORP.
HERRERA, MARTIN DILLEY PRODUCTION CO. BAYSIDE PETROLEUM CORP. CHRISTICO PETROLEUM COMPANY
INCO INVESTMENTS CORPORATION BRAGG DRILLING CO., INC. NELSON, LLOYD ALCOR ENERGY, INC.
KELPETRO, INC. MID-TEXAS RESOURCES, INC. C-K RESOURCES, INC. OUTLINE OIL CORP.
MID-CONTINENTAL PETROLEUM, INC. RGR PRODUCTION GREAT WEST ENERGY & EXPL., INC. TIDAL PETROLEUM, INC.
FAR, INC. SOMEX ENERGY COMPANY TEJAS PETROLEUM CORPORATION HNG OIL COMPANY
KIMBERJAY OIL & GAS COMPANY DITTMAN PRODUCTION MARK IV ENERGY TEXOMA PRODUCTION COMPANY
HARVEY BROTHERS OIL & GAS COTTONWOOD EXPLORATION COMPANY GRANDE OIL COMPANY ARENA OIL & GAS COMPANY
WIMMER, ARTHUR LLOYD, JR. DAVIS, R.V. DELTA EXPLORATION COMPANY, INC. CASHCO OIL COMPANY
PEDECO, INC. UNITED PET. DISTRIBUTORS, INC. REDMAN OPERATING COMPANY PARKER, G.R. COMPANY, INC
LANG EXPLORATION CO. OSYKA OIL & GAS, INC. BRAYTON OIL CORP. PULLIN LEASE SERVICE, INC.
AMERICAN GULF ENERGY, INC. ACTION DRILLING COMPANY BERGMAN, OWEN L. PHOENIX OIL & GAS, INC. (A)
LONG, JOHN M., L.C. MIL AIR OIL & GAS SCHIMMEL, V.G. CSA EXPLORATION COMPANY
HAILEY OIL K-N OPERATING CORP. PROLER - HARKINS ACIETEROS, LTD.
BENSON, W. R. PETREX INCORPORATED QUINTANILLA, LEO TXO MINERALS, INC.
PETROLEUM CAPITAL, L.C. FERRIER OIL & GAS, INC. B D PRODUCTION CO., INC. WETZEL, A. H. JR.
SOUTHERN ENERGY & EXPLORATION CO NRG RESOURCES, INC. AMERICAN COASTAL ENERGY, INC. JJRS INVESTMENTS INC.
PETROLERO CORP. BMW RESOURCES, INC. LAHOMA PROPERTIES, INC. PROPERTY DEVELOPMENT GROUP, INC.
RAY JR. CO., INC. GLOBAL PRODUCTION COMPANY PETRONOMICS PETROLEUM, INC. ROLLERT CO., INC., THE
JADE OPERATING CO. DELAWARE ROYAL PROPERTIES, INC. HOUSER, PHILIP S. TOMLINSON OIL CO., INC.
R-A-R INTERESTS BALCONES OIL CO. JS PETROLEUM, INC. WILBANKS, JOE A.
TEXAS & GREAT WESTERN OIL CO. HUGHES, DAN A. COMPANY ALLTEX DISPOSAL SOLUTIONS LLC MERCURY EXPLORATION CO.
BLUMBERG, ROLAND K. PETROLIA DRILLING CORP. DELRAY OIL, INC. TX PETROLEUM COMPANY
READING & BATES OIL AND GAS CO. FOSTER, W.P. MAPCO MINERALS CORPORATION VALENTINE CONSULTANTS, INC.
DURANGO PRODUCTION COMPANY, INC. STRATCO PRODUCERS CORPORATION STX PERRYMAN & MURCHISON
J. D. PRODUCTION EVERGREEN ENERGY CORP. REPUBLIC RESOURCES, LLC. LINDHOLM, CHARLES STEVEN
DESERT RESOURCES, INC. SMITH PETROLEUM COMPANY PENINSULA RESOURCES CORP. ATASCOSA DISPOSAL WELL SVCS LLC
WINDSOR PRODUCING CO. HILL PRODUCTION CO.-WISCONSIN DIRNETT, INC. DELCAR, INC.
ESENJAY PETROLEUM CORP. PUEBLO MIDSTREAM GAS CORPORATION HARPER HEFTE, INC. VIRTEX PETROLEUM COMPANY, INC.
STOKES, O. K. GREAT BAY OPERATIONS, LLC WJC, INC. SCHIMMEL, V. I.
KILLAM & HURD, LTD. BLEDSOE, R.K. TRUST OIL OPERATOR MORROW, D. B. INC. SUN EXPL. & PROD. CO.-HOUSTON
GETTY OIL CO. FLAG-REDFERN OIL COMPANY RODESSA OPERATING COMPANY GATHINGS OIL, INC.
BARNES-HOLDER, INC. EP OPERATING LIMITED PARTNERSHIP EXCALIBUR E & P, LLC HENRY PETROLEUM CORP.
H. & J. DRILLING COMPANY GUINN OPERATING COMPANY MIRANDA ENERGY CORPORATION J-A-H, INC.
DIXIE EXPLORATION CO. ARLEDGE PETROLEUM CORP. CROMOCO, INC. ENEXCO U.S.A., LTD.
PIONEER NATURAL RES. USA, INC. CARRIZO (EAGLE FORD) LLC CINCO NATURAL RESOURCES CORP. BARROW, WILLIAM R. INTERESTS
RAINBOW MINERALS, INC. EOG RESOURCES, INC. MILLER, W. C. OPERATING COMPANY KARNEI, HARLAN
DORCHESTER EXPLORATION, INC. TURNER, M. O. J & L RESOURCES, INC. RADER OIL COMPANY
CABOT OIL & GAS CORPORATION TEXAS OIL & GAS CORP. TANA OIL & GAS CORPORATION SOUTH TEXAS DRILLING & EXPL, INC
SPAIN OIL COMPANY RAINER ENERGY, INC. CARL, W. E. CICO OIL & GAS COMPANY
PAISANO RESOURCES PNP PETROLEUM, INC. LIBERTY ENERGY CO. OF TEX., INC. J3 OIL CO., INC.
CHRISTIE ENERGY CO., INC. STACCATTO ENERGY CORPORATION RIO EXPLORATION COMPANY ALLIANCE EXPLORATION CORPORATION
ZAPATA-FENDER, L. L. C. SANDIA OPERATING CORP. STONE, M. L. C4 SERVICES
CHEVRON U. S. A. INC. FAIR, RALPH E. INC. PINTEX OPERATING INC. NORTHRIDGE OIL COMPANY
SUE-ANN OPERATING CO. D & G GAS & OIL COMPANY CARRIZO OIL & GAS, INC. BLEDSOE, R. N. OIL PRODUCTION
PROTEUS PETROLEUM INC. REH ENERGY, INC. ARGYLE DRILLING COMPANY, INC. DISCORBIS OIL COMPANY
BLAIR, JACK N. CHESAPEAKE OPERATING, INC. EL PASO FIELD SERVICES, L.P. NIXON DRILLING CO., INC.
HARRISON INTERESTS, LTD. HOLLOWAY OIL COMPANY FOURESS, INC. MOMENTUM PRODUCTION CORP.
M. J. G., INC. EXPORT PETROLEUM CORPORATION SHORELINE OPERATING, INC. HAYDEN OIL COMPANY
LIVINGSTON COMPANY, THE (A) LANCER PETROLEUM CORPORATION PETROLITHICS, INC. APACHE CORPORATION
TEXAS EMPIRE PETROLEUM CORP. P-B-G PRODUCTION, INC. GREAT SOUTHWEST EXPLOR&DRILLING STINSON, M. C.
MATADOR PRODUCTION COMPANY EXPLORER ENERGY CORP. ACTIVA RESOURCES, LLC GLENCO OIL & GAS COMPANY
XTO ENERGY INC. ENERGY EQUITY COMPANY SANDEFER PETROLEUM COMPANY ANADARKO PRODUCTION COMPANY
LONE STAR NATURAL RESOURCES, INC COMSTOCK OIL & GAS, LP EMERY ENERGY, INC. SOUTHWEST OPERATING
TEAL EXPLORATION, LTD. AMERICAN ENERGY DEVELOPMENT CO. ULTRAMAR OIL AND GAS LIMITED TOWNSEND THE CO.
SABRE OPERATING, INC. QUINTANA PET. CORP. EVERGREEN OIL CORPORATION FINA OIL & CHEMICAL COMPANY
TRIAD ENERGY CORPORATION HUNT ENERGY CORP. K.O.G. OPERATING CO. SILVER FALLS PETROLEUM CORP.
SUE-ANN OPERATING, L.C. MG EXPLORATION, INC. HAT CREEK OPERATING COMPANY LLC NUGGET OIL CORPORATION
CARTER, J.E. ENERGY, INC. KEMP ENERGY COMPANY LATIMER, D. GAIL ENTERPRISES,INC FINGER OIL & GAS, INC.
WAGNER, DUER & CO. PETRUS OPERATING CO., INC. BALD OPERATING & EXPLORATION VIRTEX OPERATING COMPANY, INC.
ENSERCH EXPLORATION, INC PINNERGY, LTD. EL DORADO OIL & GAS INC. PROSPECTORS LTD., THE
CORSICANA FIELD FUND WELHAUSEN COMPANY, THE TORONADO ENERGY CO., INC. EXXETER PETROLEUM CORP.
HAWKEN ENERGY CORPORATION CUDE, JAMES W. OIL PHYLKO ENERGY CORPORATION JOYCE & HILTY, INC.
GRANDE OPERATING & EXPL. COMPANY CHANDLER, RANDALL MURMAK OIL COMPANY BYNUM-WEAVER OIL COMPANY, INC.
PEARL, BILL H. PRODUCTIONS, INC. LA ROCA OIL COMPANY SPILLER, ROBERT S. SONAT EXPLORATION CO. - HOUSTON
NOD, INC. MANTI OPERATING COMPANY MARATHON OIL EF LLC GEOSOUTHERN ENERGY CORPORATION
ESCONDIDO ENTERPRISES CO. PROPET OIL & GAS INC. ANAQUA OIL & GAS, INC. PETREX OPERATING COMPANY INC.
NORTH AMERICAN OIL & GAS, INC. WILBANKS, BRUCE A. COMPANY CUMMINS & WALKER OIL CO., INC. CONOCO INC.
BALCONES OIL CO., INC. WEN-BE LAWBAR PETROLEUM, INC. CHARO ENERGY CO., INC.
URSA PETROLEUM CO., INC. N.F. OIL & GAS, INC. R-A-R SPECIAL CAMPBELL, L. W.
ZOOM, INC. WAYNE OIL COMPANY AM-TEX OIL & GAS, INC. PLYMOUTH OIL & GAS CO.
HOLLUB, LAMBERT DRILLING COMPANY ENERGY RESOURCES OIL & GAS CORP. ALLEGRO INVESTMENTS, INC. FLORI-TEX ENERGY CORP.
CATLETT, E. G. TRACE OIL & GAS COMPANY S & S PETROLEUM TUCKER, ALLAN C.
ATASCO, INC. LITTLE OIL & GAS, INC. HILLSIDE EQUITIES, INC. GASPER RICE RESOURCES, LTD.
COMPLETE VACUUM AND RENTAL INC H-M OIL COMPANY MESQUITE LAND & MINERALS, INC. MARATHON OIL COMPANY
EAGLE FORD ENVIRO. SERVICES, LLC AUSTEX MANAGEMENT, INC. FOSSIL EXPLORATION, INC. SOUTHWEST ENERGY GROUP, INC.
PETROL CONSORTIUM, INC. TEXAS BISON PETROLEUM EMERSON OIL COMPANY AMERICAN COMETRA, INC.
SEEKER OIL COMPANY, INCORPORATED COASTAL PLAINS DISPOSAL #1, LLC BAILEY, L. J. SANTEX ENERGY INC.
DORRIS PETROLEUM, INC. MOBIL PRODUCING TX. & N.M. INC. BOMMER ENGINEERING CO. RICKAWAY ENERGY CORP.
SOMERSET OIL COMPANY PRIMARY FUELS, INC. DRILL-CO., INC. CHAPARRAL NATURAL RESOURCES,INC.
HOUTEX PETROLEUM, INC. MONROE WELL SERVICE, INC. ZERO CORPORATION OF TEXAS SUNCO OIL & GAS
DEWBRE PETROLEUM CORPORATION BISHOP PETROLEUM INC. SANTA FE - WINDSOR PRODUCING CO. C&E PRODUCTION, LLC
RIVER RESOURCES, INC. SHALLOW ZONES ENERGY CORPORATION K2 PETROLEUM, INC. SUN EXPL. & PROD. CO.-CORPUS
LONGHORN GAS CO., INC. MIL AIR OIL CO., INC. MAGNA OIL & GAS CORPORATION AUSTIN PETRO, INC.
LABELLE CORPORATION COLLIER DIAMOND -C- OILS, INC. TEXAS AMERICAN OIL CORP. WAPITI OPERATING, LLC
HARRIS, LLOYD A. OPERATING ACCT. LANTANA RESOURCES, INC. PENTEX EXPLORATION, INC. ABRAXAS PETROLEUM CORPORATION
CUDE PETROLEUM, INC. RIO-TEX, INC. SKIDMORE EXPLORATION, INC. PRUD-HOMME, GILBERT
CORPUS CHRISTI LEASEHOLDS, INC. ENRON OIL & GAS COMPANY EPGT TEXAS PIPELINE, L.P. KEBO OIL & GAS, INC.
THORNE, JAMES R. HOWARD, DOUGLAS J. RICHLAND EXPLORATION CORPORATION TEAL PETROLEUM COMPANY
BAY ROCK OPERATING COMPANY LAJET, INC. S & R OIL CO., INC. G. R. C. PRODUCTION COMPANY
SNG OPERATING, LLC CAL-WACO OIL CO. INC. SAHARA OIL AND GAS, INC. SANTA CLARA CORP., THE
LITTLE OAK OIL COMPANY BURK ROYALTY COMPANY WATSON OIL CORPORATION CUMBERLAND, CHARLIE
HELTZEL DRILLING&EXPLORATION CO. SEAGULL OPERATING CO., INC. GIERHART, B. J. INC. INTERNATIONAL WESTERN OIL CORP.
KIMBELL OIL COMPANY OF TEXAS ESCONDIDO OPERATING, INC. HUNT OIL COMPANY VALENCE OPERATING COMPANY
STANDARD ENERGY CORPORATION HUGHES TEXAS PETROLEUM, LTD. TOPAZ ENERGY, INC.