Federal-Land O&G Operators

Wells, BLM leases, and royalty exposure for top federal-land operators.

Showing 1,656 of 1,656

NOBLE ENERGY INC

TEP ROCKY MOUNTAIN LLC

PDC ENERGY INC

CARBON CREEK ENERGY LLC

QB ENERGY OPERATING LLC

CONTANGO RESOURCES LLC

CROWHEART ENERGY LLC

PUREWEST RESOURCES INC

OWN RESOURCES OPERATING LLC

HESS BAKKEN INVESTMENTS II, LLC

JONAH ENERGY LLC

WHITING OIL AND GAS CORPORATION

EVERGREEN NATURAL RESOURCES LLC

HILCORP ENERGY COMPANY

MARATHON OIL COMPANY

CRESTONE PEAK RESOURCES OPERATING LLC

DEVON ENERGY WILLISTON, L.L.C

FDL OPERATING LLC

ANADARKO E&P ONSHORE LLC

MERIT ENERGY COMPANY

STORM CAT ENERGY USA OPERATING CORP

OASIS PETROLEUM NORTH AMERICA LLC

LARAMIE ENERGY LLC

XTO ENERGY INC

EXTRACTION OIL & GAS INC

SCOUT ENERGY MANAGEMENT LLC

KP KAUFFMAN COMPANY INC

HIGH PLAINS GAS LLC

BURLINGTON RESOURCES OIL & GAS COMPANY LP

SIMCOE LLC

PATRIOT ENERGY RESOURCES LLC

ENCANA OIL & GAS (USA) INC

GREEN RESERVE ENERGY HOLDINGS LLC

EOG RESOURCES, INC.

BISON IV OPERATING LLC

DEVON ENERGY PRODUCTION COMPANY LP

BONANZA CREEK ENERGY OPERATING COMPANY LLC

PETRO-HUNT, L.L.C.

WEXPRO COMPANY

HIGHPOINT OPERATING CORPORATION

UNKNOWN

GREYLOCK PRODUCTION LLC

PENNACO ENERGY INCORPORATED

CITATION OIL & GAS CORPORATION

BP AMERICA PRODUCTION COMPANY

WPX ENERGY ROCKY MOUNTAIN LLC

M & K OIL COMPANY LLC

TRUE OIL LLC

LORAL OPERATING LLC

FIDELITY EXPLORATION & PRODUCTION CO

SUMMIT GAS RESOURCES INC

RED WILLOW PRODUCTION COMPANY

UTAH GAS OP LTD DBA UTAH GAS CORP

AMERADA HESS CORPORATION

VERDAD RESOURCES LLC

COBRA OIL & GAS CORPORATION

BEARCAT ENERGY LLC (COLORADO)

PRAIRIE OPERATING CO LLC

BREITBURN OPERATING L.P.

POWDER BATTALION HOLDINGS LLC

OSAGE PARTNERS LLC

FUNDARE RESOURCES OPERATING COMPANY LLC

AMOCO PRODUCTION COMPANY

URBAN OIL & GAS GROUP LLC

MULL DRILLING COMPANY INC

OGRIS OPERATING LLC

BERRY PETROLEUM COMPANY LLC

DUNAMIS ENERGY OPERATING LLC

NEPTUNE OPERATING LLC

FORMENTERA OPERATIONS, LLC

DENBURY ONSHORE, LLC

USA EXPLORATION & PRODUCTION LLC

PADCO LLC

KRAKEN OPERATING, LLC

LANCE OIL & GAS COMPANY INC

HUNT OIL COMPANY

CAERUS PICEANCE LLC

SNYDER OIL CORP

WHITING OIL & GAS CORPORATION

SUNSHINE VALLEY PETROLEUM

LIME ROCK RESOURCES III-A, L.P.

TIGER OIL COMPANY

AMPLIFY ENERGY OPERATING LLC

LOCIN OIL CORPORATION

MATRIX PRODUCTION COMPANY

CIVITAS NORTH LLC

MUREX PETROLEUM CORPORATION

E & B NATURAL RESOURCES MANAGEMENT

RESOLUTE WYOMING INC

BRITISH AMERICAN OIL PROD CO

CONOCO PHILLIPS COMPANY

AETHON ENERGY OPERATING LLC

DAVIS OIL COMPANY

J W OPERATING COMPANY

SHELL OIL COMPANY

PIONEER NATURAL RESOURCES USA INC

BAYSWATER EXPLORATION & PRODUCTION LLC

ALLISON DRILLING COMPANY INC

PURE PETROLEUM LLC

PETRO-CANADA RESOURCES (USA) INC

Zavanna Energy Operating, LLC

GERRITY OIL & GAS CORP

RICHARDSON OPERATING CO

WINDSOR ENERGY GROUP LLC

BLACK THUNDER OIL LLC

PLAINS EX

LONGS PEAK RESOURCES LLC

8 NORTH LLC

ATLANTIC RICHFIELD COMPANY

PEABODY NATURAL GAS LLC

ANADARKO PETROLEUM CORPORATION

EDGE ENERGY II LLC

WIND RIVER ENERGY COMMISSION

HS RESOURCES INC

Silver Hill Energy Operating, LLC

OLD OPERATORS - STATUS UNKNOWN

ANSCHUTZ EXPLORATION CORPORATION

EXETER DRILLING CO

PCR OPERATING LLC

WIEPKING-FULLERTON ENERGY LLC

TOLTEK DRILLING CO

ROSEWOOD RESOURCES INC

LANGLEY ENERGY

Phoenix Operating LLC

VAQUERO BIG HORN LLC

SNOWY OWL LLC

ENERGY MINERALS CORP

AXIS EXPLORATION LLC

POC-I LLC

CHANDLER & ASSOCIATES LLC

PAINTED PEGASUS PETROLEUM LLC

CIRIS ENERGY INC

KODA RESOURCES OPERATING, LLC

WME YATES LLC

KIMBARK OIL & GAS COMPANY

STANOLIND OIL & GAS COMPANY

COLORADO INTERSTATE GAS COMPANY LLC

LOGOS OPERATING LLC

RENEGADE OIL & GAS COMPANY LLC

VERMILION ENERGY USA LLC

BLACK BEAR OIL CORPORATION

IMPETRO RESOURCES LLC

CHAMPLIN PETROLEUM COMPANY

SAMEDAN OIL CORPORATION

SIGNAL HILL COMPANY LLC

OXY USA WTP LP

SMITH ENERGY LLC

SKAER ENTERPRISES

CONTINENTAL RESOURCES INC

WESTPORT OIL & GAS COMPANY LP

EOG Y RESOURCES INC

MORNINGSTAR OPERATING LLC

NORTH SHORE EXPLORATION & PROD LLC

GMT EXPLORATION COMPANY LLC

WRC ENERGY LLC

BXP OPERATING LLC

EXXON MOBIL OIL CORPORATION

APACHE CORPORATION

PETRO-HUNT DAKOTA, LLC

STUARCO OIL CO INC

MAGPIE OPERATING INC

CONFLUENCE DJ LLC

GRANITE CREEK ENERGY LLC

VISION ENERGY LLC

RANGEVIEW RESOURCES OPERATING CO

GREAT WESTERN OPERATING COMPANY LLC

ANTLER ENERGY LLC

TWIN ARROW INC

PINE HAVEN RESOURCES LLC

CHACO ENERGY COMPANY

WAPITI OPERATING LLC

KINDER MORGAN CO2 CO LLC

ENDURING RESOURCES LLC

FOUNDATION ENERGY MANAGEMENT LLC

VESSELS OIL & GAS COMPANY

CITATION OIL & GAS CORP.

EMPIRE NORTH DAKOTA LLC

ABUNDANCE ENERGY SERVICES LLC

AMERICAN HELIUM LLC

STRACHAN EXPLORATION INC

TEXACO EXPLORATION & PRODUCTION INC.

WESTERN OPERATING COMPANY

SUNDANCE OIL COMPANY

COWBOY CLEAN FUELS LLC

MONAHAN* REX FAMILY TRUST

DIVERSIFIED OPERATING CORPORATION

GULF OIL CORPORATION

DAVIS, LLC* EDWARD MIKE

TEXACO EXPLORATION AND PRODUCTION INC

WARD & SON* ALFRED

BHP PETROLEUM COMPANY, INC.

BERENERGY CORPORATION

PAR PACIFIC HOLDINGS INC

NOBLE ENERGY PRODUCTION INC

SM ENERGY COMPANY

UNION PACIFIC RESOURCES CO.

SOGC, INC.

MUSTANG RESOURCES LLC

QEP ENERGY COMPANY

BARN OWLS LLC

ANR PRODUCTION COMPANY

CONOCO INC.

KENNEDY OIL

ANTERO RESOURCES PICEANCE LLC

SINCLAIR OIL & GAS COMPANY

TOCO CORPORATION

HYPERION OIL & GAS LLC

EMERALD OPERATING COMPANY

SAMSON RESOURCES COMPANY

31 OPERATING, LLC

TEXACO EXPLORATION & PROD

WPX ENERGY WILLISTON, LLC

PATINA OIL & GAS CORPORATION

SHELL OIL CO.

BEREN CORPORATION

TOWNSEND COMPANY

UNION OIL COMPANY OF CALIFORNIA

EVERGREEN OPERATING CORPORATION

AMOCO PRODUCTION CO.

CHESAPEAKE OPERATING, INC.

JOHNSON* S D

BASIN EXPLORATION INC

MID-CON ENERGY OPERATING LLC

SKELLY OIL COMPANY

PHILLIPS PETROLEUM CO

CORONADO OIL COMPANY

UNDERWOOD OIL & GAS

BILL BARRETT CORPORATION

BW OIL LLC

EMERALD RESTORATION & PROD

FOUNDATION ENERGY MANAGMENT LLC

HIBBERT* ESTATE OF R E

FULCRUM ENERGY OPERATING, LLC

ENERGY & CARBON MANAGEMENT COMMISSION

SG INTERESTS I LTD

OKMAR OIL CO

ZARGON OIL (ND) INC.

WAMSUTTER E&P LLC

ZENERGY, INC

WYOMING OIL & DEVELOPMENT CO

MARLIN OIL CO* THE

PETERSON ENERGY OPERATING INC

UNION TEXAS PETROLEUM

EXXON MOBIL CORPORATION

NEW DRILLING COMPANY

OILFIELD SALVAGE & SERVICE COMPANY

SRC ENERGY INC

ROBERT L BAYLESS PRODUCER LLC

KT RESOURCES LLC

TEXACO INC.

REMUDA ENERGY DEVELOPMENT LLC

CAERUS WASHCO LLC

BIG MUDDY OPERATING LLC

ROCK OIL CORP

PETROSHALE (US) INC.

BLACK DIAMOND ENERGY INC

NATURAL GAS PROCESSING COMPANY

MITCHELL ENERGY CORPORATION

GULF OIL CORP.

ARCO OIL & GAS COOMPANY

WEBB RESOURCES INC

VESSELS* TOM

SWN PRODUCTION COMPANY LLC

SOIS-OSAGE INC

KAISER FRANCIS OIL CO

BANDER & COUCH

CITY & COUNTY OF DENVER

GRAND MESA OPERATING CO

MEDALLION EXPLORATION

LARAMIE ENERGY II LLC

CCRP OPERATING INC

FRAM OPERATING LLC

KOCH INDUSTRIES, INC.

BARRETT RESOURCES CORP

BURLINGTON RESOURCES OIL & GAS COMPANY

DNR OIL & GAS INC

FINLEY RESOURCES INC

CHEVRON USA, INC.

COASTAL OIL & GAS CORPORATION

ROCKY MOUNTAIN GAS INC

ROCKY MOUNTAIN PROD CO

CENEX

PLANET ASSOCIATES INC

PETROSHARE CORPORATION

HESS CORPORATION

VISTA OPERATING INC

HUBER CORPORATION* J M

UNIOIL

ALLISON ESTATE* B F

JIMS WATER SERVICE INC

PACIFIC ENTERPRISES OIL CO USA

GEAR DRILLING COMPANY

MCOR OIL & GAS CORP.

LION OIL COMPANY

BURLINGTON RESOURCES OIL & GAS LP

COSEKA RESOURCES (USA) LTD

PHILLIPS PETROLEUM COMPANY

TEXAS COMPANY

NIGHTHAWK PRODUCTION LLC

TIPPS DRILLING CO., INC.

ROCK RIVER OPERATING INC

ENDEAVOR ENERGY LLC

STANOLIND OIL & GAS CO

SKULL CREEK A LLC

CRESCENT POINT ENERGY U.S. CORP.

STEPHENS PRODUCTION COMPANY

PUBLIC SERVICE COMPANY OF COLORADO

LIME ROCK RESOURCES V-A, L.P.

STEALTH ENERGY USA INC

KANSAS-NEBRASKA NATURAL GAS CO

LUFF EXPLORATION COMPANY

GIBSON* J W

UNION OIL CO OF CALIFORNIA

TR OPERATING LLC

CONTINENTAL OIL COMPANY

CHESAPEAKE OPERATING LLC

BENCHMARK ENERGY LLC

WYOIL CORP

NORTH FINN LLC

PETROGLYPH OPERATING CO INC ADBA PETROGLYPH ENERGY

T-REX OIL INC

CARRIZO NIOBRARA LLC

HOWELL PETROLEUM CORP

MIDWEST OIL CORPORATION

NEW ERA PETROLEUM INC

HONDO OIL & GAS

BEEMAN OIL & GAS INC

ROSETTA RESOURCES OPERATING LP

WALSH* FRANK H

THREE FORKS RESOURCES LLC

ANSCHUTZ CORP0RATION* THE

SAMSON OIL COMPANY

W. H. HUNT TRUST ESTATE

DAWSON OIL CORPORATION

SNYDER DRILLING CO* JIM

VAUGHEY & VAUGHEY

MIDGARD ENERGY COMPANY

HUGHES* WILLIAM E

ARMSTRONG OPERATING, INC.

CRAMER* J.L.

SOHIO PETR CO AKA STANDARD OIL

RED MESA HOLDINGS/O&G LLC

NORTHWEST EXPLORATION CO

WINSLOW RESOURCES INC

CABOT OIL & GAS CORPORATION

SAGE BUTTE PRB OPERATING, LLC

PETROX RESOURCES INC

BURK ROYALTY CO LTD

RED TIGER OIL & GAS LLC

FIDELITY EXPLORATION & PRODUCTION COMPANY

DIAMOND BACK DRILLING & SUPPLY INC

KENTEX WORLAND LLC

BERRY* WALTER V DBA BERRY ENERGY INC

COLEMAN OIL & GAS INC

CARDINAL DRILLING CO.

LUFF EXPLORATION

TRIGOOD OIL COMPANY

SCHNEIDER ENERGY SERVICES INC

SWEPI LP

MIDWEST OIL CORP

UNITED STATES EXPLORATION INC

CORNERSTONE NATURAL RESOURCES LLC

NYLUND* J. W.

KOCH EXPLORATION COMPANY LLC

REDBUD E&P INC

D90 Energy, LLC

RANCH OIL COMPANY

PENNZOIL CO.

OSAGE HOT OIL SERVICE

PETRO OPERATING COMPANY LLC

1876 RESOURCES LLC

SUN EXPLORATION & PRODUCTION CO.

PRODUCTION SERVICE & EQUIPMENT

INTERNATIONAL NUCLEAR CORP.

SOVEREIGN OPERATING COMPANY LLC

HOME PETROLEUM CORPORATION

KEM VENTURES LP

HEWIT* WILLIAM D

SIMON OIL LLC

L & J OPERATING INC

TOP OPERATING COMPANY

SMITH OIL PROPERTIES INC

WYTEX OIL CORP

HORIZON OIL & GAS CO

EAST CHEYENNE GAS STORAGE LLC

FUEL RESOURCES DEVELOPMENT CO

NORTH AMERICAN RESOURCES COMPANY

EARL SCHWARTZ CO.

TYLER ROCKIES EXPLORATION LTD

GARY-WILLIAMS OIL PRODUCER INC

WARD-WILLISTON COMPANY

WELLSTAR CORPORATION

NEWPORT EXPL INC

RIDGE OIL & GAS, LLC DBA RIDGE ENERGY

ALLISON BROS DRILLING CO INC

OXY USA INC.

WHITE ROCK OIL & GAS LLC

LIBERTY RESOURCES MANAGEMENT COMPANY, LLC

LASSO OIL & GAS LLC

BLACK HILLS EXPLORATION & PRODUCTION INC

SUMMIT OIL CO

NORTHERN RESOURCES, INC.

CHANDLER & ASSOCIATES, INC.

JP OIL WYOMING LLC

PINELAND OPERATING COMPANY LLC

FRITZLER RESOURCES INC

KINGWOOD OIL CO

PROSPER ENERGY CORP.

FARMERS UNION CENTRAL EXCHANGE, INC.

GRMR OIL & GAS LLC

BLACK GOLD SERVICES INC

TEXAS AMERICAN OIL CORPORATION

MESA VERDE DRILLING

WPX ENERGY RYAN GULCH LLC

ST CROIX OPERATING INC

ENBROOK OIL & GAS CO

KCS MOUNTAIN RESOURCES INC

MCBRIDE INC* W C

SLAWSON EXPLORATION COMPANY INC

SPOTTED HAWK DEVELOPMENT, LLC

CUB CREEK ENERGY LLC

SUN OIL COMPANY

MGF OIL CORPORATION

WILLIFORD RESOURCES LLC

NEWFIELD PRODUCTION COMPANY

I. J. WILHITE

LEGADO DJ, LLC

STELBAR OIL CORP INC

DOVER ATWOOD CORPORATION

STARLIGHT RESOURCES LLC

DEPCO, INC.

SUNSET PLUGGING & EQUIPMENT INC

ARGO PETROLEUM CORPORATION

O'BRIEN ENERGY RESOURCES CORP

STATOIL OIL & GAS LP

FALCON SEABOARD DRLG CO

AMERADA HESS CORP

SANDLIN OIL CORP

BLUE CHIP OIL INC

REUNION ENERGY COMPANY

UNION PACIFIC RESOURCES COMPANY

CRYSTAL EXPLORATION & PRODUCTION COMPANY

MAXIM DRILLING & EXPL INC

PROSPECT ENERGY LLC

ENERPLUS RESOURCES (USA) CORPORATION

CARDINAL PETROLEUM CO

MERIDIAN OIL INC

MONSANTO CHEMICAL COMPANY

FOSSIL ENERGY INC

C & H WELL SERVICING INC

ENERGY SEARCH CO ADBA ENERGY SEARCH CO INC

RIM OPERATING, INC.

Phoenix Petroleum, LLC

MOBIL OIL CORPORATION

ARGALI EXPLORATION COMPANY

ROSA PETROLEUM

JAVERNICK OIL

PETROLEUM, INC.

EL PASO NATURAL GAS COMPANY

PARKER & PARSLEY DEV L P

BOBCAT OIL CO

NEBRASKA DRILLERS INC

RUNNING FOXES PETROLEUM INC

ST JAMES ENERGY OPERATING INC

INVESTMENT EQUIPMENT LLC

MOUNTAIN PETROLEUM CORP

ROUNDS CO* DON M

CATAMOUNT ENERGY PARTNERS LLC

M K M OIL COMPANY

RED RIVER RANCH HOLDINGS LLC

HUCKABAY LTD* E DOYLE

ANSCHUTZ EXPLORATION CORP

BUSH DRLG CO

OSAGE OPERATING COMPANY LLC

ATLANTIC INTERNATIONAL

NEW HORIZON RESOURCES LLC

INDIAN CREEK RESOURCES INC

YOUNG OIL CO* MARSHALL R

SAMSON RESOURCES COMPANY LLC

PATRICK PETROLEUM CO.

NAUTILUS EXPLORATION LLC

BEAVER MESA EXPLORATION CO

PETROLEUM ENERGY CORP

THE TERMO COMPANY

PAN AMERICAN PETROLEUM CORP.

LECLAIR-WESTWOOD INC

OSBORN HEIRS COMPANY LTD

MCELVAIN ENERGY INC

BALLANTYNE OIL, LLC

TENNECO OIL COMPANY

SANDS-AMERICAN CORP

MARALEX RESOURCES INC

IMPACT ENERGY OPERATING LLC

REGAL PETROLEUM LTD

CABOT PETRO CORP.

STONE ENERGY LLC

RYAN OIL CO

MANEWAL BRADLEY OIL COMPANY

GRYNBERG* JACK DBA GRYNBERG PETROLEUM CO

PETROLEUM RESOURCE MANAGEMENT CORP

CEDAR RIDGE LLC

UNITED STATES SMELTING REFINING & MINING COMPANY

QUEST OIL CO

KLABZUBA OIL & GAS INC

DAWSON-CRAMER OIL CORP

W C OPERATOR LLC

SCHUMACHER* JOHN

THORSON HARRY T

QUESTAR GAS COMPANY

SUPERIOR OIL COMPANY

COORS ENERGY COMPANY

ABRAXAS PETROLEUM CORP.

ANSCHUTZ OIL CO.

TUDEX PETROLEUM INC

GREAT WESTERN DRILLING COMPANY

TRIBAR RESOURCES LLC

MORGAN OIL CO

RITCHIE EXPLORATION INC

HUNT*H.L.

INEXCO OIL COMPANY

31 OPERATING

NGL WATER SOLUTIONS DJ LLC

TRIGOOD OIL CO

SMITH ENERGY CORP

TENNECO OIL CO

PINE RIDGE OIL & GAS LLC

CONTINENTAL OIL CO.

CONTINENTAL INDUSTRIES LC

DENVER BASIN OIL CO

INDUSTRIAL GAS SERVICES INC

CALPINE NATURAL GAS LP

KGH OPERATING COMPANY

PRIME OPERATING COMPANY

P & M PETROLEUM MANAGEMENT LLC

MOUNTAIN HAWK ENERGY LLC

BATAA OIL INC

CITIES SERVICE OIL & GAS CORP

BLACK HILLS PLATEAU PRODUCTION LLC

MONCRIEF W A JR

TOBINSNET OIL & GAS LTD

PRIMA EXPLORATION, INC.

CKT ENERGY LLC

TIMKA RESOURCES LTD

BTA OIL PRODUCERS, LLC

MCCARTNEY ENGINEERING LLC

NIELSON & ASSOCIATES, INC

TEXAS AMERICAN RESOURCES COMPANY

KERR-MCGEE CORP.

WILLIAMSON INC* LOWELL

1ST NRG WYOMING INC

ALLEN OIL

DIAMOND SHAMROCK EXPLORATION CO.

MERRION OIL & GAS CORPORATION

JN EXPLORATION & PRODUCTION LIMITED PARTNERSHIP

HIGH RIVER RESOURCES OPERATING LLC

XO EXPLORATION INC

FALCON MIDSTREAM SERVICES LLC

CHIPCORE LLC

KAISER-FRANCIS OIL COMPANY

ARNELL OIL COMPANY

WHEDON OIL

WEXPRO II COMPANY

BERENERGY CORP

BLACKSTONE OPERATING INC

TRUE OIL CO.

PRINCIPLE PETROLEUM LLC

WESCO OPERATING, INC.

SIX BAR OIL LLC

HUDSON GROUP LLC

CONTINENTAL PRODUCTION CO LLC

DYNA RAY OIL & GAS COMPANY, INC.

BENSON-MONTIN-GREER DRILLING CORPORATION

T2 OPERATING CORPORATION

TIPPS* KENNETH L

GOFOR OIL, INC.

J & L OIL CORP

CABEEN EXPL

YOUNG GAS STORAGE COMPANY LTD

BRIGHT & SCHIFF

WILLISTON INDUSTRIAL SUPPLY CORPORATION

CHEMCO INC

GINTHER WARREN & CO

LUFF EXPLORATION CO

D & D RESOURCES INC

BWAB, INC.

DYCO PETROLEUM CORP

MERRION OIL & GAS CORP

CORK PETROLEUM CORPORATION

PASTERNAK IRVING ETAL

DAVIS OIL CO.

WINTER RIDGE ENERGY LLC

WESTPORT OIL & GAS COMPANY, L.P.

WELLINGTON OPERATING COMPANY

FLYING J EXPLORATION & PRODUCTION, INC.

WOLD OIL PROPERTIES INC

WESTERN NATURAL GAS INC

ENERGY ALLIANCE COMPANY INC

KASE ENERGY LLC

CROWN CENTRAL PETROLEUM CORP

LADD PETROLEUM CORP

PDS RESOURCES LLC

SUPERIOR OIL CO.

USA ENERGY LLC

LOIL OIL LLC

CASCADE PETROLEUM LLC

STEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLC

LOCKRIDGE OPERATOR, INC.* JOHN P

PETRO-LEWIS CORPORATION

HUSKY OIL COMPANY

CRESLENN OIL CO

DAVIS DRILLING INC

WESTERN GAS RESOURCES INC

THOMAS L SPRING LLC

MCDERMOTT CO INC* J RAY

GAS VENTURES LLC

BURTON/HAWKS

PONCHO PRODUCTION COMPANY

PRENALTA CORPORATION

CALVERT EXPLORATION CO.

TURTLE MOUNTAIN GAS & OIL, INC.

JORDAN* TOM

EDWARDS OPERATING COMPANY LLC

BEHRENS RESOURCES INC

CODY ENERGY INC

SPIRE STORAGE WEST LLC

UPDIKE RESOURCES INC

BAYHORSE PETROLEUM LLC

CARTER OIL COMPANY

BALDERSON-DENVER DRILLING CO

GENESIS GAS & OIL COLORADO LLC

CABOT OIL & GAS PRODUCTION

Swanson Oil & Gas LLC

ANTELOPE ENERGY COMPANY LLC

PHOENIX PRODUCTION COMPANY

COMET ENERGY SERVICES LLC

THE BRINKERHOFF COMPANY

CORDERO OIL AND GAS LLC

MESA PETROLEUM COMPANY

MIDLANDS GAS CORPORATION

GRAYSON MILL OPERATING, LLC

HUGHES* C W

WOODS PETROLEUM CORPORATION

MARTIN EXPLORATION MANAGEMENT CO

EMPIRE DRILLING COMPANY

MOORE INC* L P

ST MARY LAND & EXPLORATION COMPANY

VERDAD OIL & GAS CORPORATION

UNION TEXAS PETROLEUM CORP.

ENTEK GRB LLC

VECTA OIL & GAS LTD

DUNCAN ENERGY CO.

BRACK DRILLING CO INC

BIG FOUR PETROLEUM CO

NATIONAL COOP REFINERY ASSOC

GREAT AMERICAN ROYALTIES, INC.

PETROHUNTER OPERATING COMPANY

FOREST OIL CORPORATION

BIG HORN OIL & GAS

GEORESOURCES, INC.

GUEST & MOLLER OIL CO

GUNNISON ENERGY LLC

VOSS ENTERPRISES

SPELLBOUND ENERGY LLC

BROWN OIL & GAS LLC

BURNS* THOMAS B

PLAINS PETROLEUM OPERATING CO

SPRINGLINE OPERATING LLC

ANSCHUTZ CORPORATION

PRONGHORN OPERATING LLC

LONGHORN SUPPLY CO

LARIO OIL & GAS COMPANY

QUICKSILVER RESOURCES INC

ELM RIDGE EXPLORATION COMPANY LLC

COLTON & COLTON

GRIZZLY OPERATING LLC

GRIFFIN PETROLEUM CORP

NORTH SHORE EXPLORATION AND PRODUCTION LLC

JELLCO LLC

SPRING VALLEY PETROLEUM

EXXON COMPANY, U.S.A.

MONSANTO OIL CO

SOUTH PASS PETROLEUM INC

COLTON LIMITED LIABILITY CO

DECLAR OIL & GAS INC

MACHII-ROSS PETROLEUM CO

MANX OIL CORPORATION

TRIANGLE J OIL CO

SEELEY OIL COMPANY LLC

HAWKS* JEFF

CONTINENTAL OPERATING CO

MDS ENERGY DEVELOPMENT LLC

CARTER OIL CO.

DAUBE COMPANY THE

HOUY* CARL A

RESOURCE ENERGY CAN-AM LLC

PRESIDIO EXPLORATION, INC.

PLUG NICKEL OIL COMPANY INC

AMERADA PETROLEUM CORPORATION

PINEDALE INVESTMENT INC

PILOT OIL COMPANY

GUIDA* ARTHUR M

MILLENNIUM OIL & GAS LLC

RELIABLE OIL & GAS INC

PEAK PETROLEUM COMPANY

TEOCALI ENERGY LLC

KISSINGER PETROLEUM CORP

DUNCAN OIL, INC.

WARREGO OIL & GAS LLC

SOUTH TEXAS DEVELOPMENT CO

ALASKA OIL & MINERALS CORP

HALBERT, JENNINGS & SIMIC

SCHLAIKJER A L

HERNDON DRILLING CO

STATES OIL COMPANY

DUKE GAS COMPANY LLC

TINDALL OPERATING COMPANY

CORAL PRODUCTION CORPORATION

COCKRELL OIL CORP

CHALLENGER POINT ENERGY, LLC

CELSIUS ENERGY COMPANY

PURE OIL CO.

BRINKERHOFF DRILLING COMPANY

BOVAIRD SUPPLY COMPANY

WRIGHT* ROBERT L

ATR ENERGY CORP

ARCH CREEK DEVELOPMENT

NEWARD CORPORATION

WOLVERINE RESOURCES LLC

OLDS OIL COMPANY

NORTH PARK ENERGY INC

INEXCO OIL CO

HRC OPERATING, LLC

GETTY OIL CO.

LOEB LLC* HERMAN L

CAVANAUGH & CAVANAUGH INC

WYTEX SERVICE CORP

PATHFINDER ENERGY INC

WINKLER L W & SON

SOUTHERN OIL LLC

JOEMAR WYOMING OPERATING LLC

IMPACT ENERGY INC

WHISLER ENTERPRISE COMPANY

BEARTOOTH OIL AND GAS CO

GREAT AMERICAN EXPLORATION, INC.

TEXAS TEA OF COLORADO LLC DBA TEXAS TEA LLC

PETRON DEVELOPMENT COMPANY

PGC LLC

FERRIS* W W

HABCO, INC

AEON ENERGY CORP

NORTHERN PRODUCTION CO

HOUSTON EXPLORATION COMPANY* THE

HYDRA SERVICES LLC

THREE STATE WELL SERVICE INC

GIFFIN DRILLING INC

PATARA OIL & GAS LLC

TERRA RESOURCES INC

Tallgrass Water North Dakota, LLC

CM PRODUCTION LLC

SANDS OIL COMPANY INC

IRON CREEK PROPERTIES INC

RETAMCO OPERATING INC

BUCK CREEK OIL COMPANY

ORYX ENERGY CO.

WINTERSHALL CORPORATION

FRANCIS ENERGY INC

BURLINGTON NORTHERN INC

PUCKETT-WARREN OIL CO

SOUTHWESTERN PRODUCTION CORP

MIAMI OIL PROD INC

ATLANTIC RICHFIELD CO

CAMWEST LIMITED PARTNERSHIP

DIAMOND OPERATING INC

WHITE BUTTE OIL OPERATIONS, LLC

RIO MESA RESOURCES INC

NORTHERN PUMP CO.

RED HAWK PETROLEUM LLC

RAVEN OIL & REFINING CO

EDWARD MIKE DAVIS

TRIANGLE USA PETROLEUM CORPORATION

EMRE OIL LLC

ENCANA ENERGY RESOURCES INC

LAMAR HUNT

CHAPMAN OIL COMPANY

ENCORE OPERATING, L.P.

CAZA DRILLING COMPANY

HLM DRILLING COMPANY

NORSK HYDRO PETROLEUM CO

LYCO ENERGY CORPORATION

PLATTE VALLEY PETRO ENERGY INC

GUNNISON ENERGY CORPORATION

SELECT WATER SOLUTIONS, LLC

BEARTOOTH OIL & GAS COMPANY

BALLANTYNE OIL

AUGUSTUS ENERGY PARTNERS LLC

NANCE PETROLEUM CORPORATION

SNOWDEN OIL CO

ANADARKO PRODUCTION CO.

RESONANCE EXPLORATION (NORTH DAKOTA) LLC

GRIFFIN *BENNIE C

RAMPIKE RESOURCES LTD

ALPHA PETROVISION US INC

PRIVATE OIL INDUSTRIES INC

LOW D J

MESA HYDROCARBONS LLC

CLAYTON OIL CO

SUNDANCE ENERGY INC

ORYX ENERGY COMPANY

BONNEVILLE FUELS CORP

SIDWELL JR* WILLIAM A

MINERAL RESOURCES INC

BOWERS OIL & GAS INC

PACIFIC ENTERPRISES OIL COMPANY (USA)

RAYMOND OIL & GAS CO., INC

JOHN B. HAWLEY, JR. TRUST #1

LFC NO 68 CORP

FDF RESOURCES

C & J FIELD SERVICES

HELENA RESOURCES INC

PRB OIL & GAS INC

EAGLE OPERATING INC

DYER* J G

INCREMENTAL OIL & GAS (FLORENCE) LLC

DON BILLS & ST. CLAIR

APOLLO OPERATING LLC

MORMAC OIL & GAS CO.

NORTH AMERICAN ROYALTIES, INC.

CHARTER EXPLORATION & PROD

HIGH SUMMIT OIL & GAS INC

ENERVEST OPERATING LLC

CHAMPLIN PETROLEUM CO.

CAROL-HOLLY OIL CORPORATION

ENTERPRISE ENERGY, INC.

EOG (NEW MEXICO) INC.

EMPIRE STATE OIL

EQUITABLE RESOURCES ENERGY CO.

EQUITY OIL COMPANY

KLT GAS INC

HEARTLAND OIL & GAS COMPANY

POLARIS PRODUCTION OPCO LLC

L & M VENTURES INC

AMERICAN RESOURCES MGMT CORP

BULLOCK A O

FEES JR AND SON OIL & GAS* WALTER S

ANDERSON OIL COMPANY

MEDORA MINERALS, LLC

ANDERSON-PRICHARD OIL CORP

BMW OIL CO

GEM OIL COMPANY

SHAWNEE OIL DEVELOPMENT CO INC

BIG PINEY OIL & GAS COMPANY

GLG ENERGY LP

HUBER J M CORP

KEBA OIL & GAS CO

P.O. & G. OPERATING, LLC

LADD & LUKOWICZ

PETROGULF CORPORATION

STREAM INC

KENNEDY & MITCHELL, INC.

OXFORD EXPLORATION CO

QUINTANA PETROLEUM CORP

UTAH SOUTHERN OIL CO

PALO ALTO ENERGY, LLC

ELLBOGEN JOHN P LTD

MILINDA OIL COMPANY

BP EXPLORATION INC

PERLMAN* WILLIAM

SOUTHWESTERN PRODUCTION CORPORATION

TIMBERLINE ENERGY INC

SHAKESPEARE OIL CO INC

SUNBEHM GAS, INC.

CARDINAL WYOMING LLC

KNIGHT & MILLER OIL CORP

ROMAC EXPLORATION CO INC

GENERAL PETROLEUM CORPORATION

BTA OIL PRODUCERS

DUNNE EQUITIES OPERATING INC

GREAT NORTHERN GAS COMPANY

VISUAL OPTICS INC

CHS MCPHERSON REFINERY INC

CAT OIL

CONQUEST OIL COMPANY

SPRECHER J D

HADLEY/JACKSON ENERGY LLC

FRICK & FRACK DRILLING INC

ALAMOSA DRILLING INC

HUNTINGTON ENERGY LLC

GENERAL AMERICAN OIL CO OF TEXAS

AXEM RESOURCES, INC.

JERRY CHAMBERS EXPLORATION CO.

FINA OIL & CHEMICAL CO

BREW* R D

RAYMOND OIL COMPANY INC

BRANDLY OILMAN CONSULTANTS INC

FISHER EDDIE

MEDALLION PETROLEUM INC

WASHAKIE ENERGIES COMPANY

ANTELOPE RESOURCES INC

TOC OIL INC

QUINOCO PETROLEUM INC

COLORADO PACIFIC PETR CORP

HENDERSON PETROLEUM CORP

SHELL WESTERN E&P

RINCON OPERATING CO

TRANS TEXAS ENERGY INC.

PETCON ASSOCIATES LTD

WESCO PRODUCTION LLC

GOLDEN BEAR ENERGY INC

MIRACLE FIFER DRLG

BASELINE DRILLING CO

H. L. HUNT

CAROLINE HUNT TRUST ESTATE

MOBIL EXPL & PRODUCING NORTH AMERICA INC

DIETLER & OLESON, INC.

INTERMOUNTAIN OIL CO

UTAH SOUTHERN OIL

AMERICAN BERYLLIUM OIL CORP

PLACID OIL CO.

HIGHPOINT ENERGY LLC

PEASE OIL & GAS COMPANY

BUTTES RESOURCES CO

CUMMINS* DEAN L.

INLAND DRILLING CO

HUSKY OIL CO

UTE PRODUCTION COMPANY

HAYES PETROLEUM COMPANY

OVERLAND RESOURCES LLC

BENSON MINERAL GROUP INC

PENNZOIL EXPLORATION & PRODUCTION CO.

CORINTHIAN EXPLORATION (USA) CORP

WILLIS L. WALKER

PETRO HARVESTER OPERATING COMPANY, LLC

WASHBURN LEE

WILLIAM HERBERT HUNT

SANDRIDGE EXPLORATION & PRODUCTION LLC

JETTISON, INC.

OVINTIV USA INC.

CALVERT DRILLING, INC

HOME PETROLEUM CORP.

CHAPARRAL RESOURCES INC

UNIVERSAL RESOURCES CORP.

KISSACK WATER & OIL SERVICE INC

PROVIDENCE OPERATING LLC DBA POCO OPERATING

ENRON OIL & GAS COMPANY

CARRIZO OIL & GAS INC

CALVERT DRILLING & PRODUCING CO.

STAR OIL OPERATING COMPANY LLC

C & K PETROLEUM INC

SALT CREEK OPERATING LLC

MARLIN OIL COMPANY LLC

CONDOR ENERGY TECHNOLOGY LLC

ADAMS H D LLC

WACKER OIL, INC.

MIAMI PETROLEUM COMPANY, INC.

SOUTHERN STATES PETR CORP

FRANKFORT OIL CO

HUNT ENERGY CORP.

GPO OPERATIONS LLC

ARROWHEAD EXPLORATION COMPANY

AMBASSADOR OIL CORP

ANSCHUTZ DRILLING CO. INC.

CLAYCOMB & GUIDA OIL PROPERTY

TRINITY ENERGY CORPORATION

L & B OIL CO INC

CHEVRON MIDCONTINENT LP

GENERAL ATLANTIC ENERGY CORP.

Legacy Reserves Operating LP

BELCO PETROLEUM CORP.

GARFIELD SAMUEL S ETAL

TIPPERARY OIL & GAS CORP

L & R DRILLING COMPANY

SOUTHLAND ROYALTY COMPANY

WESTERN GAS RESOURCES-SAND WASH INC

LEWIS & CLARK EXPLORATION COMPANY

WESTERN AMERICAN RESOURCES LLC

GRIFFIN MANAGEMENT LLC

GRIFFIN OIL & GAS, INC.

THUNDERBIRD RESOURCES LP

BONANZA CREEK OIL COMPANY LLC

FIREBIRD SERVICES, LLC

ANCHOR BAY CORPORATION

SOVEREIGN ENERGY LLC

BRITISH AMERICAN ENGY RES INC

TOPAZ SOUTHWEST INC

COLUMBIA GAS DEVELOPMENT CORP.

SAGE ENERGY COMPANY

CACHE EXPLORATION INC

CUMBERLAND OPERATING LLC

NOFFSINGER MANUFACTURING CO

CANTERRA PETROLEUM, INC.

LUBAUER PETROLEUM COMPANT

ENPRO LLC

CENTRAL OPERATING INC

CENTURY ENERGY

DEADWOOD OSAGE OIL

CHARTER PRODUCTION COMPANY

OSAGE TRUST

CENTENNIAL OIL CO

SIX TEN OPERATING COMPANY INC

ARNOLD* H C

GADECO LLC

ATOMIC OIL & GAS LLC

AUGUSTUS ENERGY RESOURCES LLC

MORTON OIL

BAKKEN HUNTER, LLC

RITTER, LABER & ASSOCIATES, INC.

AMAX OIL & GAS INC

AMERICAN INTERNATIONAL ENERGY CORP

ANTELOPE GAS PRODUCTS COMPANY

ARROWHEAD EXPLORATION CO.

BIRD OIL CORPORATION

BLACKROCK ENERGY CORP

CITIES SERVICE OIL CO.

CLINE PRODUCTION COMPANY

CLYDE W. JONES

DIAMOND B INDUSTRIES INC

DIAMOND OIL & GAS LLC

ENERGY QUEST II LLC

EP ENERGY MANAGEMENT LLC

EPIC ENERGY LLC

GERMANY INVESTMENT CO

GORDON ENGINEERING INC

GREAT WESTERN DRILLING CO.

GREYBULL REFINING CO

HUNT PETROLEUM CORP.

JVA OPERATING COMPANY INC

KING RESOURCES CO.

MCCULLISS RESOURCE COMPANY INC

MCELROY RANCH CO

MEGA ENERGY LLC

MESA PETROLEUM CO.

MISSOURI BASIN WELL SERVICE, INC.

MITCHELL ENERGY CORP.

MORNING GUN EXPLORATION LLC

NATURAL RESOURCE GROUP INC

RICHMOND PETROLEUM INC

STROUD OIL PROPERTIES INC

TOM JORDAN

ULTRA RESOURCES INC

UPTON RESOURCES U.S.A. INC.

VORTEX PETROLEUM INC

WESTPORT OIL & GAS CO., INC.

WISER OIL CO.

Valkyrie Operating, LLC

TXO PRODUCTION CORP.

BALLARD PETROLEUM HOLDINGS, LLC

FLYING J OIL & GAS INC

TRANSTEXAS GAS CORPORATION

TAYLOR OIL COMPANY

SUN EXPLORATION AND PRODUCTION COMPANY

NATION* C E

JUSTICE OIL & GAS LLC

STATEX PETROLEUM INC

BRADEN OIL COMPANY

EXCELSIOR OIL CORP

MUNDELL F E

MAR-WIN DEVELOPMENT CO.

VITRUVIAN EXPLORATION LLC

VIKING RESOURCES CORP

GEARY OIL CO

ARLIAN, INC.

GEOCHEMICAL SURVEYS

GETTY OIL COMPANY

SHERROD & APPERSON

C M & W DRILLING

CENEX INC

LOMITA OPERATING COMPANY

OMNI OPERATING COMPANY

MONUMENT GLOBAL RESOURCES INC

SCHREIDER & COMPANY INC

RALPH O. BROWN

CHAMPLIN OIL & REFINING CO

UNION PACIFIC RAILROAD CO

KIESLING OIL COMPANY

BEAMS* R J

MINGO OIL PRODUCERS

JOSEPH J. C. PAINE & ASSOCIATES

WRIGHTS OIL & GAS

BITTERROOT ENERGY PARTNERS LLC

OUTLAW OIL AND GAS LLC

LADMER* JACK G.

OHIO OIL

O'DONNELL & EDMONDSON

NORTHSTAR GAS COMPANY INC

PHOENIX RESOURCES LLC

TEXOTA OIL CO.

DICKINSON EXPLORATION

SHEPLER & THOMAS INC

AMERICAN PETROLEUM ENERGY CO

WOLF EXPLORATION COMPANY

TOMBERLIN* BILL

O'BRIEN ENERGY RESOURCES CORPORATION

WAVETECH HELIUM INC

BASIC EARTH SCIENCE SYSTEMS, INC.

PATTERSON GAS & OIL CO

MINERAL RESOURCES & ENGINEERING

KAREN OIL CO

BOB DENNIS

WBI ENERGY TRANSMISSION INC

BRADEN, HOOVER, KEJR

TRANSHORIZON ENERGY INC

LODESTONE OPERATING

MARKUS PRODUCTION, INC

DAMSON OIL CORP

KEWANEE OIL COMPANY

FERGUSON ENERGY INC

FIVE STATES OPERATING COMPANY LLC

TETON ENERGY

MEYER OIL COMPANY

FUNDAMENTAL OIL CORP

SOHIO PETROLEUM COMPANY

PREMIUM OIL CO

RANGELY OIL & GAS CO

BLACK RAVEN ENERGY INC

GENESIS GAS & OIL LLC

NATIONAL FUEL CORPORATION

CIMARRON OIL CO INC

DEVON ENERGY CORPORATION

VIKING PETROLEUM INC

SKAER PROPERTIES LTD PARTNERSHIP

HRM RESOURCES II LLC

GREAT BASINS PETR CO

BEARD OIL CO

CONDOR PETROLEUM, INC.

H & R WELL SERVICES INC

BASS ENTERPRISES PRODUCTION CO.

BROOKS EXPLORATION, INC.

DIABLO DRLG INC

HATHAWAY OPERATORS, INC

HENRY HILL OIL SERVICES, LLC

HUNT OIL CO

HYCO OIL INC

INTERNATIONAL NUCLEAR CORPORATION

JUHAN* EDWARD N

KENNEY* K O

RAISA II OPERATING LLC

BIG HORN POWDER RIVER CO

BLACK DIAMOND ENERGY OF DELAWARE INC

BNL (ENTERPRISE) INC

PAUL RANKIN INC.

MUSH CREEK PRODUCERS ETAL

BURLINGTON RESOURCES OIL & GAS COMPANY L

CENTURY OIL & GAS CORP.

CHANDLER-MUSGROVE, INC

CHOLLA PRODUCTION LLC

MISSOURI RIVER RESOURCES ND, LLC

TULEY & CARTER

TREND RESOURCES LTD

AMBRA OIL & GAS CO

TRANSCONTINENT OIL COMPANY

MICHIGAN WISCONSIN PIPE LINE C

COLTEX PETROLEUM INC

COLUMBUS ENERGY CORP.

CORAL PRODUCTION CORP

MCKENZIE ENERGY PARTNERS, LLC

PACIFIC WESTERN OIL COMPANY

STRATOGRAPHIC OIL CO

STERLING DRILLING COMPANY

ENERGY EQUITY COMPANY

WOLD OIL & GAS

MATRIX ENERGY LLC

EUCLID OIL

EVERTSON OPERATING INC

MARTENS C F

EXETER EXPLORATION COMPANY

SPOKANE-WYOMING OIL

ANDRIKOPOULOS RESOURCES* A G

FEDERATED OIL & GAS PROPERTIES

SOUTH RANCH OIL COMPANY, INC.

M W PETROLEUM COMPANY

SKELLY OIL CO.

GOULD & ASSOCIATES* JOSEPH B

LONG PETROLEUM, INC.

GREYBULL OIL COMPANY

SENTINEL PETR INC

LOUISIANA LAND & EXPLORATION CO

MILESTONE PETROLEUM INC

BLACK COAL RESOURCES COMPANY

OCCIDENTAL PETROLEUM CORP

NORTHWEST PIPELINE CORP

NAUTILUS EQUIPMENT INC

PARKER & PARSLEY PRODUCING LP

NATIONAL ASSOC PETR CO

MORAN EXPLORATION, INC.

MILLER-CHRISTENSEN OIL CORP

PETROMAX ENERGY CORPORATION

MCLAUGHLIN* C T

PINTAIL PETROLEUM LTD

PIONEER EXPLORATION LLC

MAXIMUS OPERATING LTD

POINT LOOKOUT DRILLING

PRIDE ENERGY, AN OKLAHOMA GENERAL PARTNERSHIP

PUBCO PETR CORP

LEWIS BROTHERS, INC.

LEWIS & CLARK EXPLORATION

RANGER OIL CO.

KERR-MCGEE CORPORATION

INFINITY OIL & GAS OF WYOMING

HRBEK* RANDALL L

RODEN, DARDEN, & MCRAE, LTD

ROUSE * JACK

H & M OIL PRODUCERS

FREEDOM ENERGY INC

FIFTH CREEK ENERGY OPERATING COMPANY LLC

SPRING VALLEY DEVELOPMENT CO LLC

ENRON OIL & GAS CO.

EMERALD OIL, INC

AKA ENERGY GROUP LLC

DUNWICK CO

DOLPHIN ENERGY CORPORATION

DODGE* JOSEPH V

TBI PRODUCTION COMPANY

DELANEY PETROLEUM CO

DEKALB ENERGY CO.

TEXAS CRUDE ENERGY, INC.

CORTEZ OIL CO

CONTINENTAL

CHATHAM OIL CO

CGT INC

CARTER & CARTER

ABRAXAS PETROLEUM CORPORATION

BOWEN EXPLORATION

WHITE OWL ENERGY SERVICES (US) INC.

WILLIFORD ENERGY COMPANY

ARGO OIL CORPORATION

WINSLOW* DONALD C.

AMPOLEX (USA) INC

ALPHA COAL WEST INC

ALLEN* H C

TEXAS OIL & GAS CORP.

M & J OIL CO.

ENERGETICS OPERATING CO.

E. L. K. OIL COMPANY

SUMMIT OIL & GAS LLC

EARTHSTONE ENERGY INC

ELK EXPLORATION INC

AXIA ENERGY LLC

GIBSON WELL SERVICES CO* J W

STEPHENS ENERGY COMPANY LLC

ENERGY OIL INC

ESENJAY OPERATING INC

WOOSLEY OIL CO

MANNING JACK E

PRAIRIE ENERGY MINERALS

SOUTHLAND ROYALTY COMPANY LLC

QB ENERGY SERVICES LLC

BALCRON OIL CO.

NORTH AMERICAN ENERGY

QUALLS OPERATING* R C

BENNETT PETROLEUM CORPORATION

NATIONAL PRIDE OPERATING

VOYAGER PETROLEUMS INC

PEAKVIEW OPERATING COMPANY LLC

HELIS OIL & GAS COMPANY LLC ESTATE

SAGE PETROLEUM LLC

BROSCHAT ENGINEERING & MANAGEMENT SERVICES, INC.

VIERSEN & COCHRAN

ROCKPORT ENERGY SOLUTIONS LLC

BUTTES GAS & OIL CO.

HARPER OIL CO.

BYRON OIL INDUSTRIES INC

SAMUEL GARY JR. & ASSOCIATES, INC.

HARLAN DRILLING CO

ARGENTIA CORP

MOSBACHER PRODUCTION CO.

CARLSON PETROLEUM COMPANY

ACKMAN-SCHULEIN & ASSOC., LTD

SCARLETT ENERGY ENTERPRISES LLC

CHAMBERS & KENNEDY

CHORNEY OIL CO

PUMA PETROLEUM CO.

JACK M. JOHNSTON DRILLING CO.

CHURCHILL ENERGY INC

KREUGER OIL ETAL

CLARION RESOURCES, INC.

MERCURY RESOURCES LLC

ROEHRS* ROBERT C.

CONOCOPHILLIPS COMPANY

SERVICE DRILLING CO

ALLEN OIL & GAS LLC

CORDERO MINING LLC

CREST RESOURCES INC

SHARPLES OIL

CURTON CAPITAL CORP

TEXAS GAS EXPLORATION CORP

TEXAKOTA, INC.

SHELTER US INC

DELANEY* ED F.

PROSPECTIVE INVEST & TRAD CO LTD

ORM EXPLORATION CO

TENNESSEE GAS TRANSMISSION CO

DIAMONDBACK OIL CORP

SIGNAL DRILLING & EXPLORATION, INC.

DIRECT PETROLEUM EXPLORATION INC

DONALD C. SLAWSON

DONNELLY CASING PULLING CO

DONZOIL INC

SUNBURST INC

SIMCOX OIL CO.

MBI OIL & GAS, LLC

GRACE PETROLEUM CORPORATION

ARGONEX COMPANY LLC

Murfin Drilling Company, Inc.

DOME PETROLEUM CORP

HELMERICH & PAYNE INC

HUMBLE OIL & REFINING COMPANY

ROCKET DRILLING CO

ROCKY MTN NATURAL GAS LLC ADBA BLACK HILLS ENERGY

NORTH RANGE RESOURCES, LLC

HESS WATER SERVICES LLC

SAMSON OIL AND GAS USA, INC

SAND HILLS SOCIETY

HANSON OPERATING COMPANY INC

SCHULEIN* ROBERT

SCHUTZ* HAROLD

GULF ENERGY CORPORATION

LOVE MILLER DRLG

LUBAR OIL COMPANY

LUSK OPERATING LLC

GAS PRODUCING ENTERPRISES, INC.

GALLOWAY BROTHERS

GAGE OIL & GAS

G3 OPERATING, LLC

WONDERLY CORP* THE

MACKINNIE OIL & DRILLING

POGO PRODUCING CO.

PML OPERATING LLC

WORTH* CHARLES E

STEALTH ENERGY INC

MAXUS EXPLORATION CO.

ELGIN* CARL OIL COMPANY

ALPHA ENERGY LLC

TEAPOT OIL & REFINING COMPANY

DELHI TAYLOR OIL CORP

DCD INC

MCMAHON AND BULLINGTON DRL''G CO

DAHILL MURRAY P

CUTLASS OIL CORP

THE TEXAS CO.

THOROFARE RESOURCES, INC

TITAN EXPLORATION LLC

MCMURRY OIL LLC

MIDWEST ENTERPRISES INC

TRANSCONTINENTAL OIL CORP

PETROLEUM CORPORATION OF AMERICA

TREND EXPLORATION CO

MISSOURI RIVER ROYALTY CORPORATION

TUTHILL & BARBEE

TWO J OIL COMPANY

ALLEN AND SCHRAMM INC

CARMACK DRILLING CO

VAUGHN PETROLEUM, INC.

BURCH* BOB

BROWNLIE, WALLACE, ARMSTRONG, BANDER

BRITISH AMERICAN OIL

WARD-WILLISTON DRILLING CO.

BLACK HILLS WYOMING GAS LLC

OEDEKOVEN WATER & HOT OIL

WEST TEXAS OPERATING CO LLC DBA XTREME ENERGYCO

BING HAROLD C

PALO PETROLEUM INC

WESTERN INTERIOR ENERGY INC

NOLBURN ENERGY

WILLARD PEASE OIL & GAS

ANT HILLS PRODUCTION

KETAL OIL PRODUCING CO

KIRKWOOD W C

JUNIPER PETROLEUM CORPORATION

RIATA ENERGY INC

YELLOWSTONE PETROLEUM

IMPACT EXPLORATION & PRODUCTION LLC

HYNDREX RESOURCES

KTM OPERATING LLC

PETRO-LEWIS CORP.

BHP PETROLEUM (AMERICAS) INC.

HARRINGTON* D D

PRECISIONEERING INC

SUPRON ENERGY CORP.

SWEDLUND AND ROLAND

WHITING PETROLEUM CORPORATION

HARPEL JOHN P JR

ALPINE OIL & GAS CORP

CALIFORNIA COMPANY * THE

HOLLANDSWORTH DRILLING CO

DJ RESOURCES INC

VAST OPERATIONS, LLC

CALIFORNIA OIL GROUP, LTD

PACIFIC NATURAL GAS EXPL

TOM F. MARSH

GRAHAM-MICHAELIS DRILLING CO

CARDINAL & GREAT AMERICAN EXPLORATION

CARIBOU ENERGY INC

HALEY/HUGHES OPERATIONS

TOTAL PETROLEUM, INC.

CASCADE OIL

COLUMBINE EXPLORATION CORP

TANDEM OIL CO

NORTH STAR OPERATING COMPANY

MCCOY PETROLEUM CORPORATION

SAPPHIRE-AMERICAN PETROLEUM

CENTURY OIL AND GAS LLC

PETROCORP INCORPORATED

EASTERN AMERICAN ENERGY CORP

UNITED NATURAL RESOURCES CORP.

MONTANA-DAKOTA UTILITIES CO.

NORTHWESTERN PRODUCTION LLC

MONSANTO CHEMICAL CO.

TEAGUE*LE

ENDURO OPERATING LLC

CMO RESOURCES INC

PIONEER OIL & GAS

GLENN OIL

CLARK OIL & GAS INC

HABERSHAM ENERGY COMPANY

CINNAMON CREEK OIL & GAS INC

RAYMOND* C F

BAUMGARTNER* F. W.

BERCO RESOURCES, LLC

MCKNAB PRODUCTION COMPANY

ARJAY OIL COMPANY

TERRA MARINE ENERGY CO

SUMMIT RESOURCES, INC.

DENVER EAST MACHINERY COMPANY

GEORGE-WRATHER

MCLAUGHLIN* STUART W

WINDRIDGE OPERATING LLC

STATES OIL CO.

MARTIN OIL CO.

OIL RESOURCES INC

ZEPHYR DRILLING CORP

TEXAS AMERICAN OIL CORP

DUGAN PRODUCTION CORP

DANIELS * AL

O'HARA* E B

ST MICHAEL EXPL CO

M & G OIL AND GAS INC

DOUGLAS OIL FIELDS

GRIFF OIL & GAS INC

LYNX EXPLORATION CO

J.R. DRILLING & EXPLOR CO. INC

DAKOTA CRUDE, INC.

WECO DEVELOPMENT CORPORATION

YALE PETROLEUM CORPORATION

THE CALIFORNIA COMPANY

MULE CREEK OIL COMPANY

HAWKS INDUSTRIES, INC

PENDEXCO

LEAR PETROLEUM EXPL INC

SHARPLES PHILLIP T TRUST

SOUTHPORT EXPLORATION, INC.

CSG EXPLORATION CO

GENERAL CRUDE OIL CO.

SUNSHINE MINING COMPANY

BURNETT ENERGY INC.

SILVER MOUNTAIN ENERGY LLC

PRAIRIE RESOURCES LLC

TOM BROWN, INC.

CONSOLIDATED OIL & GAS, INC.

ADOBE RESOURCES CORP

RAINBOW RESOURCES, INC.

GROSS TODD

HIGGINS BERT

SKELLY OIL

NORTHWEST PROD CORP

SULLIVAN* BRUCE

LUNDVALL OIL & GAS INC

AMAX PETROLEUM CORP

SUNRAY MID-CONTINENT OIL CO

TAYLOR W R

WIND RIVER EXPLORATION

MCDANNALD OIL COMPANY

SIERRA TRADING CORPORATION

DESERT EAGLE OPERATING LLC

DES MOINES OSAGE GAS & OIL CO

TESORO PETROLEUM CORP

SHENANDOAH ENERGY INC

WYATT PETROLEUM CORPORATION

HOLLY OIL COMPANY

GREY HAWK OPERATING LLC

LONE MOUNTAIN PRODUCTION COMPANY

DAMSON OIL CORPORATION

TEXAS PACIFIC OIL COMPANY

ANSCHUTZ DRILLING CO.

CROWN PETROLEUM COMPANY LLC

SHANNON OIL CO

COUGAR PETR INC

COTTON PETROLEUM CORPORATION

COSTILLA ENERGY INC

WYOMING RESOURCES CORPORATION

TIPPERARY OIL & GAS CORPORATION

COQUINA OIL CORPORATION

TRACKER RESOURCE DEVELOPMENT II, LLC

RISING* KEITH L.

RAYMOND T. DUNCAN

COLORADO SOUTHERN PETROLEUM CORP

COLORADO OIL & GAS CORPORATION

COASTAL PLAINS ENERGY INC

CLASSIC PETROLEUM CORP

TROJAN OIL & GAS COMPANY

CIG EXPLORATION INC NDBA EP ENERGY E&P COMPANY LP

MITCHELL JERRY P TRUSTEE

H B B INC

MOBIL OIL CORP.

RIO BLANCO NATURAL GAS CO

PETRO ROUTT INC

CHANDLER - SIMPSON INC

XERIC OIL & GAS CORPORATION

CFG ENERGY, INC

CATAMOUNT EXPL INC

ALLARDYCE* R..L.

KODIAK OIL & GAS (USA) INC.

CAMPBELL-BICKLING

I C GAS AMCANA INC

VERN O. LUND

MTG OPERATING INC

KRAKEN DEVELOPMENT III, LLC

AL-AQUITAINE EXPLORATION, LTD.

HELIS OIL & GAS COMPANY, L.L.C.

MURCHISON OIL & GAS LLC

BRISTOL PRODUCTION INC

BOWDEN ENERGY COMPANY INC

JOHNSON* F KIRK

PDC CORPORATION

JOHNSON* E LYLE

NATIONAL OIL CO

SABINE PRODUCTION CO

NATOMAS NORTH AMERICA INC

JOHNSON D E A INC

ANCORA CORPORATION

QUESTAR EXPLORATION AND PRODUCTION COMPANY

WESTERN GAS SUPPLY COMPANY

OLDS R M

S. D. JOHNSON DRILLING CO.

NEXEN OIL AND GAS U.S.A. INC.

KYE TROUT, JR.

BANEY WELL SERVICE INC

GASCO INC

B. W. DRILLING, INC.

INDIAN WELLS OIL CO

MACDONALD PRODUCTS COMPANY

FRICKEY INVESTMENT MGT CO LLC

SOUTHERN UNION PRODUCTION CO.

FORT COLLINS PROD

POWELL* C A

FALCON-ANDRAU ENERGY CO

F & J OIL LLC

GEOLINEAR CO.

SPRINGDALE PARTNERS LLC

MARSHALL & WINSTON, INC.

EXETER EXPLORATION CO.

EXCEL ENERGY CORP

PLAZA OIL & GAS LTD.

ESCALERA RESOURCES CO

EQUITY OIL CO

MAVERICK OIL COMPANY

STEAMBOAT OIL AND GAS LLC

STEARNS OIL COMPANY LLC

GEOMET OPERATING COMPANY INC

HIGH PLAINS ENERGY LLC

KERR-MCGEE OIL & GAS ONSHORE LP

OMIMEX PETROLEUM, INC.

GRAHAM ROYALTY, LTD.

NORTH CENTRAL OIL CORP

SOUTHLAND ROYALTY CO.

BRAMMER CO* JIM

MURPHY OIL CO

MURPHY SHELDON L & LORETTA

RICHARDSON OPERATING COMPANY

DUNCAN INC* R T

BOW VALLEY PETROLEUM INC

SUNSET HILL OIL CO INC

BOPCO LP

WARREN PETROLEUM CORP

SIMASKO PRODUCTION COMPANY

PIUTE ENERGY CO

NATIONAL DRILLING CO INC

DREILING LTD

AMERICAN PETROFINA CO OF TEXAS

ARAPAHO PETROLEUM INC

RESERVE DRILLING CO INC

BLACK HAWK RESOURCES CORP

SLOSS JAMES P

SPARROW OIL & GAS LLC

SMITH CONLEY P OPERATING CO

WESTATES PETROLEUM COMPANY

NAVAJO TRANSITIONAL ENERGY CO LLC

MCLISH* H P

AMERICAN METAL CLIMAX

AUSCO PETROLEUM INC

A A PRODUCTION INC

DAVIDOR & DAVIDOR

F & M OIL CO INC

GRENORA PARTNERS, L.C.

LOWELL J. WILLIAMSON, INC.

WILTSE H D

BELLWETHER EXPLORATION COMPANY

NORTHLAND ROYALTY OPERATING CO

EXETER NORTHERN

MCGLOTHLIN E O

NONSUCH NATURAL GAS INC

HOUSTON OIL & MINERALS

CIMARRON OIL & GAS CO INC

KD DRILLIING CO AND FOX, PEAKER, ET AL

DISCOVERY OIL LTD

TXO PRODUCTION CORPORATION

EP ENERGY E & P COMPANY L P

LOHMANN DRILLING COMPANY

ZAJIC* WILLIAM E

LANDAUR & ASSOCIATES

CHICAGO CORP

SMOKEY OIL COMPANY, INC.

GEMINI ENERGY RESOURCES INC

COLORADO SOUTHERN GAS INC

PRESCO INC

TRI-W CORP.

HALDE OIL INC

STEARNS* L.G. DRILLING CO

PETROCARBON ENERGY CORPORATION

OILTECH INC

HONDO OIL & GAS CO.

MONUMENT GAS MARKETING INC

MORMAC ENERGY CORP

WIN OIL COMPANY

MEDALLION OIL CO

MCALESTER FUEL COMPANY

COMDISCO EXPLORATION, INC.

MECHALKE* JOE

RATHPRO INC

CANNON RESOURCES INC

UV INDUSTRIES, INC.

NUCOR OIL & GAS INC

VALLEY OPERATING INC

CONNELL D

PUCKETT LAND COMPANY

TOBACCO GARDEN SWD LLC

SOMERS CARLTON J

HANNA SWD, LLC

PETROSTATES RESOURCES INC

COTTON PETROLEUM CORP.

CRAMER CO LTD* THE

GOODALL/CALSTAR

SILER* EARL F

JUNIPER OIL & GAS COMPANY

KINNEY COASTAL OIL CO

VIKING EXPL INC

OKMAR OIL COMPANY

PEL-TEX, INC. & CONOCO

BUFFALO OIL COMPANU

ENERGY SERVICE INVESTMENT CORP

THE POLUMBUS CORP

THE EXPLORATION COMPANY

WILLIAM E. CARL

SAGE DRILLING CO INC

VOYAGER EXPLORATION INC

FOUR STAR OIL & GAS COMPANY

HOUSTON OIL & MINERALS CORP.