Texas Oil & Gas Operators

Wells, counties, fields and production for the most active RRC operators in Texas.

Showing 3,000 of 3,000

UNIDENTIFIED

XTO ENERGY INC.

OCCIDENTAL PERMIAN LTD.

APACHE CORPORATION

PIONEER NATURAL RES. USA INC.

BASA RESOURCES INC.

SCOUT ENERGY MANAGEMENT LLC

CHEVRON U. S. A. INC.

EOG RESOURCES INC.

UPP OPERATING LLC

ENDEAVOR ENERGY RESOURCES L.P.

HILCORP ENERGY COMPANY

BLACKBEARD OPERATING LLC

EXXON CORP.

FDL OPERATING LLC

OXY USA WTP LP

SABINAL ENERGY OPERATING LLC

COG OPERATING LLC

KINDER MORGAN PRODUCTION CO LLC

BKV BARNETT LLC

OXY USA INC.

DIAMONDBACK E&P LLC

FOUR CORNERS PETROLEUM II LLC

CHESAPEAKE OPERATING L.L.C.

CONOCOPHILLIPS COMPANY

VINLAND TEXAS SERVICES LLC

LEGACY RESERVES OPERATING LP

TEP BARNETT USA LLC

MERIT ENERGY COMPANY

DEVON ENERGY PRODUCTION CO L.P.

EPIC PERMIAN OPERATING LLC

OVINTIV USA INC.

LEWIS PETRO PROPERTIES INC.

ROVER PETROLEUM OPERATING LLC

TEXACO INC.

CITATION OIL & GAS CORP.

MARATHON OIL EF LLC

AMOCO PRODUCTION COMPANY

WALSH & WATTS INC.

TEXAS PETROLEUM INVESTMENT CO.

SM ENERGY COMPANY

AGHORN OPERATING INC.

PARSLEY ENERGY OPERATIONS LLC

TEXACO E & P INC.

DISCOVERY NATURAL RESOURCES LLC

DENBURY ONSHORE LLC

BURLINGTON RESOURCES O & G CO LP

LAREDO PETROLEUM INC.

SN EF MAVERICK LLC

EAGLERIDGE OPERATING LLC

CONOCOPHILLIPS CHITTIM OPER LLC

EXXON MOBIL CORPORATION

BRIDWELL OIL CO.

FASKEN OIL AND RANCH LTD.

AVALON TX OPERATING LLC

GRIZZLY OP OF DELAWARE LLC

4P ENERGY TEXAS LLC

EP ENERGY E&P COMPANY L.P.

CCI EAST TEXAS UPSTREAM LLC

BEDROCK PRODUCTION LLC

PANTERA ENERGY COMPANY

ANADARKO E&P ONSHORE LLC

R2Q OPERATING LLC

LARGE OPERATING LLC

SABINE OIL & GAS CORPORATION

UNIT PETROLEUM COMPANY

UNION OIL COMPANY OF CALIFORNIA

ROCKCLIFF ENERGY OPERATING LLC

PRESIDIO PETROLEUM LLC

HUNT OIL COMPANY

MAGNOLIA OIL & GAS OPERATING LLC

PHILLIPS PETROLEUM COMPANY

CROWNQUEST OPERATING LLC

TEXLAND PETROLEUM L.P.

BP AMERICA PRODUCTION COMPANY

WHITE KNIGHT PRODUCTION LLC

ZARVONA ENERGY LLC

CHEVRON MIDCONTINENT L.P.

MOBIL PRODUCING TX. & N.M. INC.

UNITEX OIL & GAS L.L.C.

KILLAM OIL CO. LTD.

ROCKER A OPERATING COMPANY

MEWBOURNE OIL COMPANY

MITCHELL ENERGY CORPORATION

WHITE ROCK OIL & GAS LLC

RING ENERGY INC.

ARCO OIL & GAS CO.

CONOCO INC.

SHERIDAN PRODUCTION CO III LLC

STRONGHOLD ENERGY II OPER LLC

STANOLIND PRODUCTION LLC

STEPHENS & JOHNSON OPERATING CO.

PONDEROSA TX OPERATING LLC

SUN EXPLORATION & PRODUCTION CO.

SOUTH SAM OPERATING COMPANY LLC

COMSTOCK OIL & GAS LLC

MURPHY EXPL. & PROD. CO. - USA

QUATRO OIL AND GAS INC.

QEP ENERGY COMPANY

URBAN OIL & GAS GROUP LLC

LIME ROCK RESOURCES IV-A L.P.

GTG OPERATING LLC

WINCHESTER OIL & GAS LLC

WPX ENERGY PERMIAN LLC

BREITBURN OPERATING L.P.

PEBA OIL & GAS INC.

PRIME OPERATING COMPANY

GULF OIL CORP.

WAGNER OIL COMPANY

SLANT OPERATING LLC

MOMENTUM OPERATING CO. INC.

SABLE PERMIAN RESOURCES LLC

INDEPENDENCE RESOURCES MGMT LLC

BAR L PRODUCERS

ATLAS OPERATING LLC

BPX OPERATING COMPANY

AMPLIFY ENERGY OPERATING LLC

CALLON PETROLEUM OPERATING CO

SHELL WESTERN E&P

DE3 OPERATING LLC

SOJOURNER DRILLING CORPORATION

L.C.S. PRODUCTION COMPANY

LATIGO PETROLEUM LLC

VALENCE OPERATING COMPANY

OCCIDENTAL W TX OVERTHRUST INC.

WALSH PETROLEUM INC.

ORLAND OIL & GAS LLC

MARATHON OIL COMPANY

JAY MANAGEMENT COMPANY LLC

FAULCONER VERNON E. INC.

V & H OIL L.P.

D10 ENERGY LLC

CROSS TIMBERS ENERGY LLC

BROWN GEO. R PARTNERSHIP LP THE

SHERIDAN PRODUCTION COMPANY LLC

SOUTHWEST ROYALTIES INC.

SURGE OPERATING LLC

SHALLOW PRODUCTION OPER LLC

CHOLLA PETROLEUM INC.

AZTECA PETROLEUM LLC

JOHNSON & ERNST OPERATING CO.

DALLAS PRODUCTION INC.

LINDER JOHN OPERATING CO. LLC

PARALLEL PETROLEUM LLC

CIMAREX ENERGY CO.

DAYLIGHT PETROLEUM LLC

SUN EXPL. & PROD. CO.-CORPUS

ENSIGN OPERATING LLC

WHITING OIL AND GAS CORPORATION

ANADARKO PETROLEUM CORPORATION

CALLON (EAGLE FORD) LLC

SUMMIT PETROLEUM LLC

BURLINGTON RESOURCES OIL&GAS CO.

ROSETTA RESOURCES OPERATING LP

TANOS EXPLORATION II LLC

ORYX ENERGY COMPANY

TXO PRODUCTION CORP.

UNION PACIFIC RESOURCES COMPANY

SMITH PRODUCTION INC.

SUE-ANN OPERATING L.C.

CHESAPEAKE OPERATING INC.

TORRENT OIL LLC

NOBLE ENERGY INC

SHELL OIL COMPANY

TEXAS SECONDARY OIL CORPORATION

THOMPSON J. CLEO

ARCH OIL & GAS LLC

GREAT WESTERN DRILLING COMPANY

WHITE OAK OPERATING COMPANY LLC

TRINITY OPERATING (USG) LLC

JO MILL OIL COMPANY LLC

4-SIGHT OPERATING COMPANY LTD.

REPSOL OIL & GAS USA LLC

PETEX

POLARIS OPERATING LLC

QUAIL CREEK OIL CORPORATION

MOBIL OIL CORPORATION

DELRAY OIL INC.

CROSSROADS OPERATING LLC

COX JOHN L.

STASNEY WELL SERVICE LLC

O RYAN OIL AND GAS

BURK ROYALTY COMPANY

ATLANTIC RICHFIELD CO.

SN OPERATING LLC

BOAZ ENERGY II OPERATING LLC

MCGOWAN WORKING PARTNERS INC.

WFW PRODUCTION COMPANY INC.

T & R OPERATING LLC

REVERENCE OPERATING LLC

PETCO PETROLEUM CORP.

VAQUERO HUNTER INC.

JONES ENERGY LLC

FELDERHOFF PRODUCTION COMPANY

SCHLACHTER OPERATING CORPORATION

HUMBLE OIL & REFINING CO.

PENN VIRGINIA OIL & GAS L.P.

ACADIA OIL LLC

TREK RESOURCES INC.

SARATOGA PRODUCTION COMPANY LLC

PRODUCTION RESOURCES INC.

EL DORADO GAS & OIL INC.

JUNO OPERATING COMPANY III LLC

CIMAREX ENERGY CO. OF COLORADO

MAVERICK ENERGY GROUP INC.

APV MCCAMEY LLC

JETTA OPERATING COMPANY INC.

OILEX INT L INVESTMENTS INC.

SEM OPERATING COMPANY LLC

TENNECO OIL CO.

COLUMBUS ENERGY LLC

CONTINENTAL OIL COMPANY

COMPASS ENERGY OPERATING LLC

SAGE NATURAL RESOURCES LLC

CRESCENT PASS ENERGY LLC

WILLOWBEND INVESTMENTS INC.

VIRTEX OPERATING COMPANY INC.

CCI GULF COAST UPSTREAM LLC

SHELL WESTERN E&P INC.

VICEROY PETROLEUM LP

DISCOVERY OPERATING INC.

SEAGULL OPERATING CO. INC.

JUST OIL & GAS INC.

T-C OIL COMPANY LLC

OAKRIDGE OIL AND GAS LP

PERDURE PETROLEUM LLC

S.B. STREET OPERATING INC.

GAITHER PETROLEUM CORPORATION

GETTY OIL CO.

EXCO OPERATING COMPANY LP

SAGE ENERGY COMPANY

CML EXPLORATION LLC

HEXP OPERATING LLC

DELTA OIL & GAS LTD.

DP PERMIAN OPERATOR LLC

MILLENNIUM RESOURCES LP

BANNER OIL & GAS LLC

BUFFCO PRODUCTION INC.

CORSICANA CRUDE COMPANY LLC

THREE P OPERATING CO. GP L.L.C.

BETTIS BOYLE & STOVALL

BAYLOR OPERATING LLC

JACOBS C. E. CO.

RIDGE OIL COMPANY

FIREBIRD ENERGY LLC

BRG LONE STAR LTD.

EXTEX OPERATING COMPANY

PROLINE ENERGY RESOURCES INC

BIRCH OPERATIONS INC.

XOG OPERATING LLC

SAGA PETROLEUM LLC OF COLORADO

HENRY PETROLEUM LLC

TEMPLAR OPERATING LLC

WTG EXPLORATION

BTA OIL PRODUCERS LLC

VAN OPERATING LTD.

CENTENNIAL RESOURCE PROD LLC

TRIVISTA OPERATING LLC

WELDER EXPLORATION & PROD. INC.

SUN EXPL. & PROD. CO.-ABILENE

RELENTLESS PERMIAN OPERATING LLC

NEG OPERATING LLC

REMORA OPERATING LLC

SWANNER PROPERTIES

FROSTWOOD ENERGY LLC

BTA OIL PRODUCERS

STOUT ENERGY INC.

AMERADA HESS CORPORATION

COURSON OIL & GAS INC.

KAISER-FRANCIS OIL COMPANY

MAC 5 OPERATING LLC

MASSIE OIL COMPANY

FOREST OIL CORPORATION

P.O.&G. OPERATING LLC

BRECK OPERATING CORP.

HADLEY OIL COMPANY LLC

SUNDOWN ENERGY LP

ROMAC OIL COMPANY INC.

HAWKWOOD ENERGY OPERATING LLC

SILVERBOW RESOURCES OPER LLC

RED LINE COMPANY LTD.

RADCO OPERATIONS L.P.

ECHO PRODUCTION INC.

ASPEN OPERATING COMPANY L.L.C.

GEOSOUTHERN ENERGY CORPORATION

STRAT LAND EXPLORATION COMPANY

HAMMAN OIL & REFINING COMPANY

ENRON OIL & GAS COMPANY

PARKER & PARSLEY DEVELOPMENT L.P

DEWBRE PETROLEUM CORPORATION

ENERVEST OPERATING L.L.C.

BURK ROYALTY CO. LTD.

ANADARKO E&P COMPANY LP

NEWMAN OPERATING COMPANY

DIAMOND S ENERGY COMPANY

JONES CO.

KOVAR OPERATING LLC

NORTH RIDGE CORPORATION

VENADO OPERATING COMPANY LLC

SEVEN CROSS OPERATING LLC

BCE-MACH II LLC

J. W. RESOURCES INC.

CLEAR FORK INCORPORATED

PETROSAURUS INC.

BLS PRODUCTION CO. INC.

MERCURY OPERATING LLC

MECO IV LLC

GUIDON ENERGY MGMT SERVICES LLC

OLSEN ENERGY INC.

HIBERNIA RESOURCES III LLC

DIAMOND CHEMICALS COMPANY

W.T. WAGGONER ESTATE INC.

TAMARACK PETROLEUM COMPANY INC.

FINLEY RESOURCES INC.

VANCO OIL & GAS CORP.

TEXXOL OPERATING COMPANY INC.

HNG OIL COMPANY

LONG TRUSTS THE

FLINT OAK ENERGY LLC

ISKANDIA ENERGY OPERATING INC.

AMERICAN PETROFINA CO. OF TEX.

BLACKBRUSH O & G LLC

LONESTAR OPERATING LLC

HOPEWELL OPERATING INC.

HIGHMOUNT EXPL & PROD TEXAS LLC

ARMOR PETROLEUM INC.

OILWELL OPERATORS INC.

BAKER OPERATING INC.

ERNEST OPERATING COMPANY

SULPHUR RIVER EXPLORATION INC.

MAGNUM PRODUCING LP

BRADLEY OPERATING CO.

PARKER & PARSLEY DEVELOPMENT CO.

PETROLEGACY ENERGY II LLC

FOUNDATION ENERGY MANAGEMENT LLC

AMERICO ENERGY RESOURCES LLC

T - C OIL COMPANY

ROGERS S. K. OIL INC.

NEWFIELD EXPLORATION COMPANY

ROBERTSON RESOURCES INC.

DJH OIL & GAS LLC

RJD MANAGEMENT CO. INC.

KJ ENERGY LLC

SEABOARD OPERATING CO.

1849 ENERGY PARTNERS OPRTNG LLC

FOUNDERS OIL & GAS OPERATING LLC

PELES LLC

BXP OPERATING LLC

RICHEY RAY MANAGEMENT CO. INC.

MAMMOTH EXPLORATION LLC

ARROWHEAD PRODUCTIONS LP

EXXCEL PRODUCTION COMPANY

COOPER OIL & GAS LLC

CRD OPERATING LLC

MATADOR PRODUCTION COMPANY

BRAKA OPERATING L.L.C.

SEEKER OIL COMPANY INCORPORATED

SAMSON LONE STAR LLC

R. LACY SERVICES LTD.

AETHON ENERGY OPERATING LLC

TRIVIUM OPERATING LLC

STOVALL OPERATING CO.

KEBO OIL & GAS INC.

BORDERLINE OPERATING CORP.

G & F OIL INC.

PITCOCK INC.

SEA EAGLE FORD LLC

PITTS ENERGY CO.

TEXLAND-RECTOR & SCHUMACHER

FINA OIL & CHEMICAL COMPANY

ACOCK/ANAQUA OPERATING CO. LP

MD AMERICA ENERGY LLC

COX OIL & GAS INC.

GUNN OIL COMPANY

MCCLURE OIL COMPANY INC.

CENTURY PETROLEUM INC.

SILVER CREEK OIL & GAS LLC

EARTHSTONE OPERATING LLC

UNION TEXAS PETROLEUM CORP.

VERADO ENERGY INC.

BRP ENERGY LLC

THRONE PETROLEUM RESOURCES LLC

SHARP IMAGE ENERGY INC.

SURGE SOLUTIONS INC.

THREE R OIL COMPANY

S&G OIL LLC

CHARRO OPERATING L.L.C.

REMUDA OPERATING COMPANY

KERR-MCGEE OIL & GAS ONSHORE LLC

VERDUN OIL & GAS LLC

HUBER J. M. CORPORATION

MYERS JAMES B.

PRIMEXX OPERATING CORPORATION

SONAT EXPLORATION COMPANY -TYLER

CROWN CENTRAL PETROLEUM CORP.

S & J OPERATING CO.

HIGH RIVER RES OPERATING LLC

WILLIAMS CLAYTON ENERGY INC.

LINN OPERATING INC.

OXBOW PETROLEUM LLC

HENRY PETROLEUM CORP.

RANGE PRODUCTION COMPANY

WEATHERLY OIL & GAS LLC

LECLAIR OPERATING CO. INC.

SOUTHWEST GAS SYSTEMS INC.

ENCANA OIL & GAS(USA) INC.

REYNOLDS J. C. & W. F.

ABRAXAS PETROLEUM CORPORATION

TAPSTONE ENERGY LLC

VESS OIL CORPORATION

MCDAY ENERGY CORP.

BRAMMER PETROLEUM INC.

OPERATOR P-5 NOT ON FILE

ALCO OIL & GAS CO. LLC

WG OPERATING INC.

MONSANTO OIL COMPANY

CLARK OIL CO.

LARIO OIL & GAS COMPANY

U.S. ENERGY DEVELOPMENT CORP

GEOMEG ENERGY OPERATING CO. LLC

TEXAS PACIFIC OIL COMPANY INC.

KILMARNOCK OIL COMPANY INC.

MIKEN OIL INC.

COBRA OIL & GAS CORPORATION

C. W. RESOURCES INC.

PEARL BILL H. PRODUCTIONS INC.

CHAMPLIN PETROLEUM CO.

ARCADIA OPERATING LLC

RUSK PRODUCTION INC.

ARCO PERMIAN

EAGLE OIL & GAS CO.

HESS JERRY OPERATING CO.

HOUSTON OIL & MINERALS CORP.

SAHARA OPERATING COMPANY

BEREN CORPORATION

STAMPER OPERATING CO. INC.

PAN AMERICAN PETROLEUM CORP.

KERR-MCGEE OIL & GAS ONSHORE LP

WES-MOR DRILLING INC.

UPHAM OIL & GAS COMPANY

COALINGA CORPORATION

AURORA RESOURCES CORPORATION

U. S. OPERATING INC.

KERR-MCGEE CORPORATION

BROOKSTON ENERGY INC.

RHEACO OIL COMPANY LTD.

CAMBRIAN MANAGEMENT LTD.

BJG OPERATING COMPANY

PG-M INTERNATIONAL OPERATING LLC

KODIAK OPERATING LLC

WELLS OILFIELD SERVICES INC.

SAMEDAN OIL CORPORATION

DALF ENERGY LLC

HENRY RESOURCES LLC

CONTOUR EXPL AND PROD LLC

LMH ENERGY

WAGGONER W. T. ESTATE

C & E OPERATING INC.

CRIMSON ENERGY PARTNERS IV LLC

GUIDANCE OIL DEVELOPERS

THREE SPAN OIL & GAS INC.

MUIRFIELD EXPLORATION LTD.

HAYNIE ENERGY SERVICES LLC

CITIES SERVICE OIL CO.

WO OPERATING COMPANY

FLETCHER OPERATING LLC

MEDDERS OIL COMPANY INC.

TEXAS ENERGY OPERATIONS LC

DYNAMIC PRODUCTION INC.

SOUTHEASTERN RESOURCES CORP.

HARPER CLINT

ATAPCO

BEISCH RUSTY

C & C OIL PRODUCERS

LAREDO ENERGY OPERATING LLC

HUNT CIMARRON LTD. PARTNERSHIP

PRODUCTION CONSULTANTS INC.

QUANTUM RESOURCES MANAGEMENT LLC

CMR ENERGY L.P.

CUMMING COMPANY INC. THE

PATTERSON PETROLEUM INC.

WILLIAMS OIL COMPANY

AMOCO PRODUCTION CO.-ANDREWS

DREYFUS LOUIS NATURAL GAS CORP

BUD OIL INC.

AKINS OIL COMPANY

STEPHENS AUTRY C.

PENNZOIL EXPLORATION & PROD. CO.

PETROLEUM CORPORATION OF TEXAS

TEXACO PRODUCING INC.

COASTAL OIL & GAS CORPORATION

DOUBLE E OIL & GAS L. P.

MORIAH OPERATING LLC

TANDEM ENERGY CORPORATION

MCDANIEL COMPANY INC. THE

JM COX RESOURCES L.P.

TOC ENERGY RESOURCES LLC

NEWPORT OPERATING LLC

FINNELL OIL SERVICES INC.

FAGADAU ENERGY CORPORATION

ENSERCH EXPLORATION INC

MDF OIL COMPANY

SANDRIDGE EXPL. AND PROD. LLC

DOMINION OKLAHOMA TEXAS E&P INC

PRI OPERATING LLC

PHARAOH OIL & GAS INC.

GANADOR OPERATING LLC

HEADINGTON ENERGY PARTNERS LLC

ENHANCED ENERGY PARTNERS CORP

SHENANDOAH PETROLEUM CORPORATION

ANDERSON JAMES K. INC.

DICK LINDSAY OIL COMPANY INC.

EASTLAND OPERATING L.L.C.

LAGUNA PETROLEUM CORPORATION

D.J. & T. ENERGY

RAY LOVELESS ENTERPRISES L.L.C.

DRY FORK PRODUCTION CO. LLC

SUPERIOR OIL COMPANY THE

NORTH CENTRAL OIL CORP.

BOPCO L.P.

B. J. P. OPERATING

SOUTHWEST OPERATING INC.-TYLER

YOUNG MARSHALL R. OIL CO.

WINCHESTER PRODUCTION COMPANY

W T X CAPITAL INVESTMENTS LLC

SD ROYALE ENERGY INC.

BOLING PRODUCTION COMPANY INC.

CHAPARRAL ENERGY L.L.C.

ENERGEN RESOURCES CORPORATION

KINGWOOD EXPLORATION LLC

HANNATHON PETROLEUM LLC

ENDEAVOR NATURAL GAS LP

HOCO INC.

GRUY PETROLEUM MANAGEMENT CO.

DEMINEX U. S. OIL CO.

FALCON RESOURCES INC.

STRAND ENERGY L.C.

JAMEX INC.

WISE PRODUCTION COMPANY

COASTAL STATES GAS PROD. CO.

ABA OIL LLC

CRAIG ROBERT A.

RUSK CO. WELL SERVICE CO. INC.

ARUBA PETROLEUM INC.

CANAN OPERATING INC.

BASS ENTERPRISES PRODUCTION CO.

C-D OIL COMPANY INC.

DALLAS PETROLEUM GROUP LLC

BLACK GOLD OPERATING CO LLC

MAXUS EXPLORATION COMPANY

ETX ENERGY LLC

CONTANGO RESOURCES INC.

ROSE CITY RESOURCES LLC

PROTEGE ENERGY III LLC

WHITE MARLIN OPERATING CO LLC

TXP INCORPORATED

HAIR ROGER D.

WORSHAM-STEED GAS STORAGE LLC

TITAN ROCK E&P LLC

RKI ENERGY RESOURCES LLC

W & W PRODUCTION LLC

B-3 OIL CO.

PIEDRA OPERATING LLC

INCLINE ENERGY

SWIFT ENERGY COMPANY

REC LLC

RAY HERRING OPERATING CO. LLC

EP OPERATING COMPANY

WISCHKAEMPER KENNETH

IRON ORCHARD OPERATING LLC

CRAIG BOB

BALLARD EXPLORATION COMPANY INC.

ABLEREADY INC.

TRP OPERATING LLC

GRAND BANKS ENERGY COMPANY

O. H. M. OPERATING

HARVICK GEORGE R.

DAVIS KELLY J.

MCA PETROLEUM CORPORATION

COSTA ENERGY LLC

ESCONDIDO RESOURCES OPER CO LLC

OVERTON PARK OIL & GAS LP

BM OIL COMPANY LLC

WOODBINE PRODUCTION CORPORATION

KINCAID ETAL INC.

DFG ENERGY COMPANY LLC

JONES COMPANY LTD.

TEXAKOTA INC.

ENERGYPRO INC.

HUGHES DAN A. COMPANY L.P.

SND OPERATING L.L.C.

RESOLUTE NATURAL RES. CO. LLC

MOSAIC PECOS LLC

S N D ENERGY COMPANY INC.

LEWIS OPERATING COMPANY

GAUGE OIL COMPANY

WASH ROBERT C. INC.

ADA BELLE OIL & GAS COMPANY

M & K OPERATING LLC

LINC GULF COAST PETROLEUM INC.

GRAHAM ROYALTY LTD.

HARDWICK ROSS H. OIL COMPANY

QUANAH PANHANDLE LLC

BROWN OIL & GAS CO.

RINCON PETROLEUM CORPORATION

NADEL AND GUSSMAN PERMIAN L.L.C.

JNK ENERGY CORPORATION

SPINDLETOP OIL & GAS COMPANY

CHEYENNE PETROLEUM COMPANY

GENIE OIL COMPANY

WAGNER & BROWN LTD.

WILLIAMS A. OIL

RIFE M. O. JR.

MILLWEE OIL INC.

BURNETT OIL CO. INC.

QUINTANA PET. CORP.

BAXTER MURPHY H.

CONCHO OILFIELD SERV & OPER CO.

STAR PRODUCTION INC.

SABALO OPERATING LLC

BEST PETROLEUM EXPLORATIONS INC.

DECLEVA PAUL

HEXAGON OIL AND GAS INC.

PENNZOIL PRODUCING CO.

HALCON OPERATING CO. INC.

XPLORE OPERATING LLC

PALMER PETROLEUM INC.

PETROBAL OMEGA 1 LLC

BETRO INC.

LEJAN INC.

INTERSTATE EXPLORATIONS LLC

PHOENIX OIL & GAS INC. (A)

VENETO EXPLORATION LLC

ANTLE OPERATING INC.

MOSAIC MIDLAND LLC

FTC CONSULTING LLC

SUN EXPL. & PROD. CO.-MIDLAND

LIME ROCK RESOURCES III-A L.P.

BIG COUNTRY PIPE & SUPPLY INC.

PARDUS OIL & GAS OPERATING LP

ROCKY POINT OIL INC.

BIG D ENERGY COMPANY

PORTER JAMES W. SPECIAL

ENPOWER RESOURCES INC.

TRACKER RESOURCE DEV III LLC

HERSCHAP BROS.

COSTILLA ENERGY INC.

HYPERION OIL & GAS LLC

GARRISON LTD.

TRIO CONSULTING & MANAGEMENT LLC

3-T EXPLORATION INC.

SNYDER DRILLING CORP.

SARATOGA OIL COMPANY

PDC PERMIAN INC.

TRITON OPERATING LLC

WHEELER OPERATING CORPORATION

PROCO OPERATING CO. INC.

AMERICAN EXPLORATION COMPANY

CREBBS OIL COMPANY

HWH PRODUCTION LLC

ROFF OPERATING COMPANY LLC

LE NORMAN OPERATING LLC

DAVIS BROTHERS

BIG RUN PRODUCTION COMPANY

MAGNUM ENGINEERING COMPANY

BEACH EXPLORATION INC.

KD ENERGY LLC

R K PETROLEUM CORP.

DEC OPERATING INC.

CIVRON PETROLEUM RES. LLC

DILLARD & DILLARD INC.

CEMCO OIL

ROLLERT CO. INC. THE

PETRODOME OPERATING LLC

RILEY PERMIAN OPERATING CO LLC

BLACK ARROW OPERATING LLC

L.T.D. EXPLORATIONS INC.

POWELL GENE INVESTMENTS INC.

NORTEX ENERGY INC.

YUCCA ENERGY INC.

AUTERRA OPERATING LLC

ROSEHILL OPERATING COMPANY LLC

BRACKEN OPERATING L.L.C.

MISTEX OPERATING INC.

MILAGRO EXPLORATION LLC

RANGER OPERATING CO.

S & W OIL & GAS LLC

ROCKDALE ENERGY LLC

HUNTINGTON ENERGY L.L.C.

HOUSTON OIL PROD ENTERPRISES INC

HUGHES DAN A. COMPANY

LEM OPERATING CO. INC.

KISMET PROPERTIES INC.

STONE GREGORY W.

ARCOOIL CORP

BENNETT PRODUCTION CORPORATION

SAMSON LONE STAR LP

TRAVELERS OIL COMPANY

BAYOU OPERATING COMPANY INC.

AZTECA OPERATING INC.

MINERAL TECHNOLOGIES INC.

BRIDGE OIL COMPANY L. P.

SKELLY OIL CO.

QUAIL WELL SERVICE INC.

RENEAU JAMES SEED CO.

KURAN RESOURCES

KLAEGER OPERATING COMPANY LLC

STEWARD ENERGY II LLC

ARCH OPERATING LLC

ROBERTS & HAMMACK INC.

MONSANTO COMPANY

LASATER & CO INC.

W.B. RUSK OIL & GAS LLC

PATTON EXPLORATION INC.

GRACE PETROLEUM CORP.

TANGLEHEAD OPERATING LLC

ENERGY PRODUCTION CORPORATION

SUNERGON OIL OPERATING LLC

COMSTOCK OIL & GAS LP

SELLERS LEASE SERVICE INC.

RICHARDS TOT OIL CO.

MCCOMMONS OIL COMPANY

ENRICH OIL CORPORATION

RADCO OPERATIONS

APPROACH OPERATING LLC

MELROSE OPERATING COMPANY

MERIDIAN OIL INC.

TARPON OIL & GAS CO.

REED PRODUCTION INC.

TRIPLE G WELL SERVICE INC.

PRIMAL ENERGY CORPORATION

LERA

BAY ROCK OPERATING COMPANY

ADOBE RESOURCES CORPORATION

WALTER EXPLORATION INC.

BARGO ENERGY COMPANY

ABRAXAS PRODUCTION CORPORATION

JONES L. E. OPERATING INC.

BUSTAMANTE OIL COMPANY

PALMER MIKE OIL

FRESNO OIL COMPANY

REMORA MANAGEMENT LLC

BC OPERATING INC.

FRACO SERVICES INC.

BKM PRODUCTION

ATROPOS PRODUCTION CORPORATION

D & D ENTERPRISES

SHOCO PRODUCTION LLC

TETTLETON STEVEN B.

RAMTEX ENERGY LLC

DIMOCK OPERATING COMPANY

CHISHOLM OIL INVESTMENTS

IRON HORSE OIL & GAS INC.

QUEST EMG INC.

ROVER OPERATING COMPANY LLC

BORGER RESOURCES 2 LLC

SPH DEVELOPMENT LLC

ROG ENTERPRISES LLC

TIDAL PETROLEUM INC.

MARALO INC.

BEACON PETROLEUM CORPORATION

LEADING EDGE ENERGY LLC

TRANSTEXAS GAS CORPORATION

TRIPLE CROWN RESOURCES LLC

DORADO DRILLING INC.

TEXAS AMERICAN RESOURCES COMPANY

BOWLES ENERGY INC.

ROSEWOOD RESOURCES INC.

QUESTA ENERGY CORPORATION

FORT WORTH NATURAL GAS INC.

COCKRELL PRODUCTION CO. INC.

COTTONWOOD PETROLEUM CO.

GALVESTON BAY OPERATING CO LLC

L & M OPERATING INC.

BROWN GEORGE R.

RWA LLC

VAQUERO OPERATING

V-F PETROLEUM INC.

CABOT OIL & GAS CORPORATION

MARSHALL EXPL. INC.

J-R OIL INC.

RECOIL RESOURCES OPERATING INC.

AWP OPERATING COMPANY

MARJAC OIL COMPANY INC.

SCOTT OPERATING INC.

SISSOM OIL FIELD SERVICES LLC

RUST OIL CORP.

THURSTON TEXAS OPERATING CO LLC

TEXAS SHALLOW OIL & GAS LLC

HYDROGEO ENERGY LLC

MIDGARD ENERGY COMPANY

FELTY DRILLING CO. INC

MON CORP.

CHEVRON OIL COMPANY

BARROW-SHAVER RESOURCES CO.

BLUFF CREEK PETROLEUM LLC

SUBSURFACE PRODUCTION INC.

HARLETON OIL & GAS INC.

DEWEY PETROLEUM

AVRA OIL COMPANY

DEWBRE JERRY C. TRUSTEE

HELTON PAT A. & ALBERTA

CDJ OIL CO.

KLAEGER OPERATING COMPANY II LLC

GEURIN OIL & GAS

BORGER RESOURCES 3 LLC

KEM ENERGY INC.

MOORE ENERGY SERVICES LLC

JDL OPERATING LLC

NORDSTRAND ENGINEERING INC.

WILLIAM FLEMING PRODUCTIONS LLC

STROUD PETROLEUM INC.

WINDOW OPERATING CO. THE

OSBORN HEIRS COMPANY

MODERN EXPLORATION INC.

UNITED OIL & MINERALS INC.

LAKOTA ENERGY LTD.

SANGUINE GAS EXPLORATION LLC

MOMENTUM ENERGY CORPORATION

WILCOX ENERGY COMPANY LLC

LYNX OPERATING CO. INC.

ROLLO RESOURCES LLC

HUGHES BILL DRILLING INC.

O NEAL OIL COMPANY

SOUTHLAND ROYALTY COMPANY

DECKER OPERATING CO. L.L.C.

WETZEL OIL COMPANY

PALMER OIL PROPERTIES

LDF ENERGY LLC

RUSH CREEK OPERATING LLC

XOPHI ENERGY LLC

SIGNAL OIL COMPANY LLC

DARTEX ENERGY CORPORATION

KING ENERGY RESOURCES

ITX CORPORATION

U. D. MAN INC.

WCS OIL & GAS CORPORATION

GOOPCO INC.

OHLHAUSEN OIL COMPANY

BRIGGS & CROKER OIL LLC

CITIES SERVICE OIL & GAS CORP.

DIAMOND SHAMROCK EXPLORATION CO.

MICHAELSON PRODUCING COMPANY

BUSTAMANTE RESOURCES LLC

DURANGO RESOURCES CORP.

ANDERSON OIL LTD.

TEAL OPERATING LLC

PRONTO SERVICES

SELF CHARLES LYNN

LAMCO OIL LLC

MAZCO ENERGY LLC

TREADSTONE ENERGY PRTNR OP LLC

RATTLESNAKE OPERATING CO LLC

TAM2 SQUARED OPERATING LLC

BROWER OIL & GAS CO. INC.

MILESTONE OPERATING INC.

K R WELL TECHNOLOGY LLC

GOLDSTON OIL CORPORATION

AMPAK OIL COMPANY

MEADCO PROPERTIES

HERRING RAY

KATSCO ENERGY INC.

GRAYSON PETROLEUM COMPANY

CROSS TIMBERS OPERATING COMPANY

EL PASO E & P COMPANY L. P.

KALER ENERGY CORP.

J.A.G. OIL & GAS

DOEGE DONALD

GUNGOLL CARL E. EXPLORATION LLC

WILSON WELL SERVICE INC.

PERIMETER RESOURCE COMPANY

CANAN MOWREY OPERATING LLC

THOMPSON-CARLILE VENTURES

PMR ENERGY LLC

ADKINS R. L. CORP.

TAYLOR-LINK OPERATING CO.

XYZ OIL INC.

RUSSELL BROS. OIL & GAS INC.

RIO PETROLEUM INC.

RAPTOR RESOURCES INC.

KELLY MAHLER OPERATING LLC

QUIEN SABE OPERATING LLC

AMERICAN STAR ENERGY & MIN. CORP

KOKOMO ENERGY INC.

AMAX OIL & GAS INC.

DST OIL COMPANY

ROMCO OPERATING LLC

WINRIGHT RESOURCES OPERATING LLC

CAPITAN ENERGY INCORPORATED

DAHAB ENERGY INC.

GRANITEBAY OPERATING INC.

DOMINION EXPL. & PROD. INC.

RYAN JOSEPH G.

SHILOH OIL COMPANY LLC

DEVON ENERGY OPERATING CO. L.P.

MOKAN CAPITAL LLC

BROWNING OIL COMPANY INC.

SCHKADE BROS. OPERATING COMPANY

ARCH PETROLEUM INC.

R & R ENERGY LTD.

PARALLEL PETROLEUM CORPORATION

CALLON (PERMIAN) LLC

BURLINGTON RES O & G CO-MIDLAND

SHEFTS & SHEFTS INC.

PPC OPERATING COMPANY LLC

GILMORE LEO OIL INC.

M. E. OPERATING & SERVICES INC.

B D PRODUCTION CO. INC.

BROWN TOM INC.

INDIAN WELLS OIL COMPANY

PETROPLEX ENERGY INC.

QUEST PETROLEUM COMPANY

NICHOLS OIL CO.

CODA ENERGY INC.

GULF OIL CORP.-KILGORE

RYDER SCOTT OIL COMPANY

ATLAS ENERGY CORPORATION (DEL.)

CAMERON PAUL E. JR. INC.

INEOS USA OIL & GAS LLC

BLACK SWAN OPERATING LLC

MEB LLC

OASIS PETROLEUM PERMIAN LLC

EL TORO RESOURCES LLC

RED TANK RESOURCES LLC

BARNETT ENERGY INC.

SPINDLETOP DRILLING CO.

B.P. PRODUCTIONS INC.

TEMA OIL AND GAS COMPANY

CADDO OPERATING INC.

WORTHAM J. R.

DOUBLE PLAY OIL & GAS INC

SAUDER MANAGEMENT COMPANY

BRANDY PRODUCTION

LACY R. INC.

B.W.O.C. INC.

MOUNTAIN CREEK OIL COMPANY INC.

ARES ENERGY LTD.

UPLAND OPERATING LLC

OS&S OPERATING INC.

MAS OPERATING CO.

TERRELL OIL & GAS PRODUCTION CO.

ACTIVA RESOURCES LLC

SULLIVAN HOLLIS R. INC.

GREAT NORTHERN ENERGY INC

MDC TEXAS OPERATOR LLC

SONERRA RESOURCES CORPORATION

RANGER 40 PETROLEUM LLC

ENERGON OIL INC.

SANDEL OPERATING COMPANY

PRASAD HARI PRODUCTION CO.

BYRD OPERATING COMPANY

SAGUARO PETROLEUM LLC

MAYNARD OIL CO.

TRIPLE S GAS INC.

WAKO OIL CO. LLC

PHOENIX OIL & GAS

DELTA OIL & GAS COMPANY

MEHAFFEY INVESTMENTS INC.

HOME PETROLEUM CORP.

MCCLELLAND CREEK PROPERTIES INC.

3 S PRODUCTION INC.

SWJN OIL COMPANY

MABEE PETROLEUM CORP.

BROWN H.L. OPERATING L.L.C.

NATURAL GAS ANADARKO COMPANY

PRYOR PETROLEUM CORPORATION

THREE-B OIL COMPANY THE

MARQUEE CORPORATION

DAMSON OIL CORP.

SOCORRO EXPLORATION INC.

CALK ROGER D.

WEST OIL RESOURCES LLC

RELIANCE ENERGY INC.

FASKEN BARBARA

TABOR CREEK OIL COMPANY

ROGERS DRILLING CO. INC.

ENR OPERATING LLC

TEX/CON OIL & GAS COMPANY

ENERGY RESERVES GROUP INC.

K & W VANPELT COMPANY

ALFARO PRODUCTION LLC

PETERSON OIL AND GAS LLC

TOMSHA LLC

SEITZ J. R. & ADAM LTD.

CHISHOLM OPERATING INC.

HURD ENTERPRISES LTD.

SIANA OIL & GAS

WCS OIL AND GAS CORPORATION

STABLEROCK ENERGY L.L.C.

THREE-C PRODUCTION COMPANY

BAKER RESOURCES

AOCO OPERATING L.P.

COMSTOCK ENERGY LLC

ALFARO OIL & GAS

POLARIS PRODUCTION CORP.

KIMBROUGH OIL COMPANY

KEATING ENERGY INC.

ATOKA OPERATING INC.

TEMBER OIL COMPANY

BUCCANEER OPERATING LLC

PRIMROSE OPERATING COMPANY

P & A OPERATING INC.

ORIGIN PRODUCTION GROUP LLC

MARSHALL & WINSTON INC.

FORTUNE PRODUCTION CO.

PETRO-LEWIS CORPORATION

SORTO PETERS GOD

ALCORN RESOURCES LLC

WYNCO ENERGY INC.

CROWN EQUIPMENT CO.

BLACK GOLD WELL SERVICE

PHOENIX PETROCORP INC.

ABB OIL CO. INC.

WATSON ENERGY INVESTMENTS LLC

MARTIN JIMMY INC

NEWBRIDGE RESOURCES LLC

CXL ENERGY LLC

SOHIO PETROLEUM CO.

MOGUL RESOURCES LLC

MIDDLETON OIL COMPANY

TAYLOR & SMITH

CAPITAL STAR OIL & GAS INC.

DOUBLE M PETROPROPERTIES INC.

MARTIN FOREE OPERATING LLC

CANYON RIDGE ENERGY LLC

INPEX EAGLE FORD LLC

QP INC.

D-BAR LEASING INC.

RIATA ENERGY INC.

FOUR DIAMOND OPERATING LLC

RICHEY & COMPANY INC.

ZIEGLER-PERU INC.

GRIFFIN PETROLEUM COMPANY

ZK PETROLEUM CO. L.L.C.

VENTEX OPERATING CORP.

WALLIS ENERGY INC.

SWIFT ENERGY OPERATING LLC

TRANSAMERICAN NATURAL GAS CORP.

SUN EXPL. & PROD. CO.-LONGVIEW

WESTLAND OIL DEVELOPMENT CORP.

LADD PETROLEUM CORP.

MONCRIEF W. A. JR.

SAMSON RESOURCES COMPANY

BAM PERMIAN OPERATING LLC

BAIR S LEASE SERVICE INC.

STELZER DRILLING CO. INC.

DJ EXPLORATION INC.

MORTIMER PRODUCTION COMPANY

A.C.T. OPERATING COMPANY

ENERQUEST CORPORATION

LINDEMANN ROBERT OPERATING

ALLEGIANT RESOURCES LLC

BOYD & MCWILLIAMS ENERGY GROUP

CONTINENTAL TREND RESOURCES INC

S & M DRILLING LLC

DJM BEASLEY WELL SERVICE

TORCH OPERATING COMPANY

CARRIZO OIL & GAS INC.

NORTH AMERICAN ROYALTIES INC.

APR OPERATING LLC

TRILOGY OPERATING INC.

RUFF OIL CO.

YET PROFITS LLC

HOOVER PETROLEUM COMPANY LLC

VINTAGE PETROLEUM INC.

NELSON JAMES L.

SALVADOR OIL LLC

JLA RESOURCES COMPANY

PEDERNALES PETROLEUM OP LLC

BULLIN R. E. OPERATING INC.

CORDOVA RESOURCES INC.

BONFIRE OPERATING LLC

CREATIVE OIL AND GAS OP II LLC

FORTUNE ENERGY INC.

J V A OPERATING COMPANY INC.

TRACER OPERATING INC.

OILY DOG OPERATORS TEXAS LLC

ATEX EXPLORATION & OPERATING CO.

AMERICAN PETROLEUM CORP.

ROYAL PRODUCTION COMPANY INC.

TELESIS OPERATING CO. INC.

D L OPERATING

FOSSIL ENERGY INC.

REMNANT ENERGY INC.

MASH OILFIELD SERVICES LP

M2 SQUARED OPERATING LLC

TMR EXPLORATION INC.

GRECO OPERATING LLC

FAIR OIL LTD.

OVERLAND OPERATING COMPANY LLC

OIL GAS ETC. LLC

LUTZ AND BOYD

GEN. AMER. OIL CO. OF TEXAS

WAGNER DUER & CO.

BROWN H. L. JR.

PATTERSON PETROLEUM LP

EVEREST ENERGY LLC

CHASE PRODUCTION COMPANY

VENOCO INC.

ELLORA ENERGY INC.

REIN PUSHER OPERATING LLC

DON PETERSON COMPANY LLC -

RASMUSSEN TOM

CEDAR RIDGE ENERGY INC.

ESCONDIDO PETROLEUM COMPANY INC

RUTLEDGE-NEWSOM

PLUMLEY M. C. & ASSOCIATES

FRATELLI EXPLORATION L.P.

FAMCOR OIL INC.

PETRO LIONS LLC

BLACK MAC OIL INC.

AOCO OPERATING COMPANY L.L.C.

CYCOHL ENERGY LLC

TWILCO OPERATING LLC

DH OPERATING INC.

GUIDANCE OIL DEVELOPERS INC.(1)

RLU OIL & GAS INC.

SYDRI OPERATING LLC

FOUR C OIL & GAS CORP.

CORDELE DEVELOPMENT CORPORATION

PETRA OLEUM CORP.

SANDSTONE SERVICES LLC

BLUEBONNET LAND & CATTLE CO.

PURSLEY JOHN

MCCLYMOND LTD.

BEEHIVE OPERATING LLC

5L PROPERTIES INC.

AZUL INC.

RIFE ENERGY OPERATING INC.

BRITANCO L.L.C.

CRAMPTON FREDDIE

STOBER OIL AND GAS SERVICES LLC

HRB OPERATING COMPANY INC.

SEELY OIL COMPANY

DORCHESTER OPERATING COMPANY LLC

CD CONSULTING & OPERATING CO.

CHESTNUT EXPLOR. AND PROD. INC.

COVENANT OPERATING LLC

PRESTONWOOD OPERATING LLC

TEXSTAR OIL & GAS LLC

ARD DRILLING COMPANY INC.

EL RAN INC.

ESTANCIA OIL & GAS LLC

RMB OPERATING LLC

BLEDSOE PETRO CORPORATION

SBJ OIL & GAS LLC

NWG OPERATING LLC

PARTEN OPERATING INC.

CHISOS LTD.

ATOKA OPERATING PERMIAN LLC

EIGHTY-SIX OIL COMPANY INC.

JONCO

HARVARD PETROLEUM COMPANY LLC

MERKAZ DRILLING LLC

BROWN DARRYL OPERATING L.L.C.

PRIDE ENERGY COMPANY

5 SCHKADE

RME PETROLEUM COMPANY

CIMARRON ENGINEERING LLC

SPILLER ROBERT S.

PALO PINTO BOND COMPANY LLC

BITTER CREEK PETROLEUM CO.

LEONARD BROTHERS OPERATING CO.

NAVARRO EXPLORATION CO. INC.

BANNER OPERATING LLC

OCCIDENTAL ENERGY COMPANY INC.

PORTER OPERATING COMPANY L.L.C.

J-TEC PRODUCTION LLC

HILL R.M. OPERATING INC.

L & G OPERATING INC.

GENERAL CRUDE OIL CO.

TRITON ENERGY LLC

BURLESON OIL COMPANY

TAM2 SQUARED ENERGY SERVICES LLC

KEWANEE OIL COMPANY

ELAND ENERGY INC.

FINALY RESOURCES LLC

MITCHELL ENERGY COMPANY L.P.

VANTAGE FORT WORTH ENERGY LLC

PACIFIC ENTERPRISES OIL CO.(USA)

HIBBARD ENERGY LP

BEREXCO LLC

FJH OIL COMPANY

GOLDEN OIL AND RANCH LLC

OTEX LLC

MYERS A. J.

TXCO RESOURCES INC.

FRONT STREET OPERATING LLC

CRESCENDO RESOURCES L.P.

MANDARIN OIL & GAS COMPANY

TERRA RESOURCES INC.

SHAPPELL OIL COMPANY L.L.C.

ROCKING R INVESTMENTS INC.

KIMBELL OPERATING COMPANY

SMITH ENERGY OPERATING COMPANY

HIGHPEAK ENERGY HOLDINGS LLC

FORTAY INC.

PALMER JOHN LLC

WESTERN CHIEF OPERATING L.L.C.

MIDLAND OIL AND GAS INC.

VERDAD OIL & GAS CORPORATION

GO OIL CORP.

WESTERN ENERGY GROUP LLC

CARDONA LLC

FORTUNE RESOURCES LLC

TOWER RESOURCES INC

HAZELETT OIL INC.

LUCKY BIRD TOO

SEVENX LLC

ENHANCED RS INC.

AUSTRAL OIL COMPANY INCORPORATED

PEN-TEX PRODUCTION CO. INC.

SATANTA OIL COMPANY

KARPER OIL & GAS CORPORATION

GORDY OIL COMPANY

BRICO OIL INC.

PETROQUEST ENERGY L.L.C.

ARCHER PETROLEUM

WHITT OIL & GAS INC.

OZARK EXPLORATION INC.

CATLIN CARL

JOINT RESOURCES COMPANY

HOOD J. FRANK JR.

MITCHELL GEO. & ASSOC. INC.

LYON OPERATING COMPANY INC.(III)

MANGES CLINTON

OXXN

ICE BROTHERS INC.

KORNYE-TILLMAN COMPANY

MOSS PETROLEUM COMPANY

SANCHEZ OIL & GAS CORPORATION

ADOBE OIL & GAS CORP.

WALTON PRODUCING INC.

SQUARE MILE ENERGY L.L.C.

SUN EXPL. & PROD. CO.-HOUSTON

EXOIL RESOURCES INC.

OTEX RESOURCES LLC

THREE J ENERGY INC.

AZTEC ENERGY LLC

SABRE OPERATING INC.

KRAMER OPERATING LLC

PATTON E. N. OIL COMPANY INC.

LP ROBINSON HOLDINGS L.L.C.

R & C OIL COMPANY LLC

HUMBLE PRODUCTS INC.

CREST OPERATING COMPANY

LANEXCO INC.

TORTUGA OPERATING COMPANY

IMPERIAL GAS RESOURCES LLC

COLUMBUS ENERGY CORP.

CONTINENTAL OPERATING CO.

GILLRING OIL COMPANY

HANSON MINERALS CO.

SHELBY OPERATING COMPANY

AMERICAN PATRIOT OPERATING CORP.

HAWTHORN ENERGY PARTNERS LLC

LINCOLN ENERGY PARTNERS LLC

FURRY PRODUCING COMPANY

RKI EXPLORATION & PRODUCTION LLC

5 G RESOURCES LLC

HECI EXPLORATION COMPANY

BENCHMARK OIL & GAS COMPANY

ARNOT W. G. JR.

D. A. B. OIL SERVICE INC.

CORONA OPERATING LLC

J-D OIL CO.

CAZAR ENERGY INC

BLACK BANDANA LLC

ARNOT OIL COMPANY LLC

KLH OIL & GAS INC.

CORLENA OIL COMPANY

BLUEFIN RESOURCES LLC

SAFARI RESOURCES LLC

SAXET OIL CORPORATION

ROWAN AL

CANTERA OPERATING LLC

RESERVE OPERATING CORP.

ELLIOTT OIL & GAS OPERATING CO.

HENRY PETROLEUM LP

PETRO-HUNT L.L.C.

INLAND OCEAN INC.

GINNINGS COMPANY

STASNEY H. R. & SONS LTD.

WESTPORT OIL AND GAS COMPANY LP

JUNO OPERATING COMPANY II LLC

DARST CREEK OIL COMPANY

ARMOR LONESTAR LLC

CAPROCK INC.

PALMER SCOTT OIL

WSM

PENDRAGON OIL CO.

BROWN INDUSTRIAL GAS OP INC.

GOLDEN MARTY JOE

EVERETT OIL INC.

J-O B OPERATING COMPANY

ANADARKO PRODUCTION COMPANY

LUFKIN PRODUCTION COMPANY INC.

GRETA OPERATING COMPANY LLC

RIO-TEX INC.

SQUYRES OIL CO. INC.

EXLCO INC.

SANDERS ENERGY LLC

H & D OPERATING COMPANY

BIGFOOT OIL LLC

PLAINS EXPLORATION & PROD. CO.

AMERICAN SHORELINE INC.

GOOD OL BOYS OIL COMPANY

MAGUIRE OIL COMPANY

TUG HILL OPERATING LLC

STINE MASSIE OIL LLC

DELFIN OPERATING LLC

JQL ENERGY LLC

ROSENTHAL STANLEY H.

FAR INC.

SOTOL ENERGY INC.

STELLER ENERGY & INVESTMENT CORP

TRIPLE L OPERATING COMPANY LLC

LC OPERATING LLC

4J OIL CO. LLC

HAYS & CROKER PARTNERSHIP

KNOX INDUSTRIES INC.

N & O OIL CO.

STROUBE FAMILY PARTNERSHIP #2

CRAWFORD HUGHES OPERATING CO.

VIPER S.W.D. LLC

OUTLINE OIL COMPANY LLC

BEND PETROLEUM CORP.

PREMIER ROYALTIES L.L.C.

GEOSOUTHERN OPERATING II LLC

DAMRON ENERGY LLC

TURNBOW DRILLING CO.

ENERQUEST OPERATING L.L.C.

ATLANTIS OIL COMPANY INC.

WILBANKS RESERVE CORPORATION

D & S OIL COMPANY

TEXAS INDEPENDENT EXPLOR LTD.

CEDAR OIL COMPANY

BRIGHT & CO.

KIDD PRODUCTION CO.

BRAMMER SUPPLY INC.

AMERICAN COMETRA INC.

CRATON OPERATING LLC

BAYSWATER OPERATING COMPANY LLC

LUXE OPERATING LLC

SYNERGY OPERATING CO. LLC

FALCON PRODUCTION LLC

PARTEE DRILLING INC.

TRIANGLE THREE RESOURCES L.L.C.

RESOURCE OIL AND GAS LLC

MANTI TARKA PERMIAN OP LLC

DRAKE PETROLEUM LLC

SCHALK OIL COMPANY INC.

AGAVE OPERATING COMPANY INC.

SAWTOOTH OPERATING CO. INC.

KIRKPATRICK OIL COMPANY

GERRY-MAC OIL INC.

OLEUM EXPLORATION LLC

CIRRUS PRODUCTION COMPANY

NGEZI LCC

PEARCE ROY F. JR.

YOUNG L. M.

OVERFLOW ENERGY LLC

LAST DOLLAR LLC

GW ENERGY INC.

PERDIDO ENERGY LLC

PREMIER MINERALS INC.

LEEXUS OIL LLC

GLOBAL DRILLING LLC

ETOCO L.P.

MARWELL PETROLEUM LTD PARTNRSHIP

AMEN OIL LLC

VINSON EXPLORATION

LEGEND NATURAL GAS II LP

CHISOS OPERATING INC.

3-D OIL & GAS

R & S OIL PRODUCTION CO.

HELMS OIL & GAS LLC

JOSEY LENOIR M. INC.

MCBEE OPERATING COMPANY L.L.C.

BOYD & MCWILLIAMS OPERATING LLC

BURLESON PETROLEUM INC.

JM CALK OPERATING LLC

RLU OPERATING LLC

TRUE WOLF OPERATING LLC

SKY RESOURCES INC.

SNYDER OIL CORPORATION

REATTA ENERGY INC.

MEANS OIL COMPANY LLC

ESCO OIL OPERATING COMPANY LLC

RIM OPERATING INC.

TEXAKOMA OPERATING L.P.

KILLINGSWORTH OIL CO.

FIELDS BERT JR.

SOUTHCOAST PRODUCTION INC

MARINER ENERGY INC.

RUBY OPERATING COMPANY INC

H AND H PROD. CO.

KEETON HOLLOW EXPLORATION CO INC

ARETE OPERATING COMPANY LLC

VIN FISHER OPERATING INC.

DONOCO OIL COMPANY

BASIN OPERATING INC.

RHYNE J.V.

ZACHRY OIL AND GAS PROPERTIES

GAINES OPERATING LLC

HGN OPERATING I LLC

SUB SURFACE OPERATIONS

FIELD PETROLEUM CORP.

M & A OIL COMPANY LTD.

L-R PRODUCTION

BHP PETROLEUM (AMERICAS) INC.

SMITH PRODUCTION CO.

KILLER RABBIT FIELDS LLC

KAMPRESCO ENERGY LLC

BREEZE OIL LLC

CANNAN MORRIS

MICHAEL PETROLEUM CORPORATION

OTB OPERATING LLC

RECOVERY OPERATING LP

DELTA C02 LLC

BURLESON LEWIS B. INC.

CLIFFWOOD PRODUCTION CO.

UNION GAS OPERATING COMPANY

PASH ENERGY INC.

IPR ENERGY PARTNERS LLC

MIDSCO

PHILLIPS JACK L. CO.

WYNN-CROSBY OPERATING LTD.

CASTILLO OIL COMPANY LLC

REO OPERATING LLC

BEAR CREEK OPERATING

BORGER RESOURCES 4 LLC

ADA EXPLORATION

CHAMPLIN EXPLORATION INC.

COMSTOCK OIL & GAS INC.

JLH PETROLEUM LLC

HIGHMARK ENERGY OPERATING LLC

ORLA PETCO INC.

TEHUACANA CRUDE OIL LLC

PK GATH & OILFIELD SVCS INC.

ALTURA ENERGY LTD.

SHAMROCK TEXAS PARTNERS L.P.

ABACO OPERATING LLC

BOYD DEE WELL SERVICE

MILLER GLENN J.

TACOR RESOURCES INC

IMPETRO OPERATING LLC

WEST INLAND ENERGY INC.

PATRIOT PRODUCTION LLC

GRAND OPERATING INC.

BLACK RIVER OPERATING LLC

TEX-LEE OPERATING COMPANY

DEL MAR ENERGY INC.

HAMILTON J. R.

SHOREHAM OIL & GAS COMPANY INC.

R & D OPERATING INC.

FREE REIN OPERATING LLC

WALKER OIL AND GAS LTD

FOSSIL PETROLEUM LLC

FORELAND OPERATING LLC

GAEA SERVICES INC.

REMINGTON OIL

PINE CREEK OPERATING LLC

STEWART CONSTRUCTION

O NEILL PROPERTIES LTD.

WEST TEXAS ROYALTIES INC.

ASSENT ENERGY PARTNERS LLC

SUPREME ENERGY COMPANY INC.

WADE JIM

DUNIGAN JAMES P. INC.

MUELLER EXPLORATION INC.

EVEREST RESOURCE COMPANY

VASTAR RESOURCES INC.

UPHAM CHESTER R. JR.

ENCON SERVICES INC.

DALES OIL COMPANY

ATLANTIC OPERATING II LLC

JANDAR EXPLORATION L. C.

GREAT AMERICAN RESOURCES INC.

GAUNTT INC.

UPLAND RESOURCES LLC

SANTA FE ENERGY CO.

ATROPOS EXPLORATION COMPANY

MILTEX OIL COMPANY

SEGURO OIL AND GAS LLC

CORDA CORPORATION

SUTHERLAND ENERGY CO. LLC

GRAY KIT JR.

B AND G PRODUCTION INC.

TRINIDAD ENERGY LLC

DIAMOND ENERGY SERVICES LP

ROYAL PETROLEUM CO.

DRILLOGIX EXPLORATION LLC

HELMERICH & PAYNE INC.

BACON ENERGY

EXPANDO PRODUCTION COMPANY

TYCO OPERATING CO.

HARPER WILLIAM E.

NEW CENTURY EXPLORATION INC.

FAIR OIL COMPANY

1776 ENERGY OPERATORS LLC

SHELDON RESOURCES L.P.

BULLET DEVELOPMENT LLC

MURPHY & ASSOCIATES INC.

DDC PRODUCTION COMPANY

WILCOX PETROLEUM OPERATING LLC.

CR REED PRODUCTION INC.

MERIDIAN OIL PRODUCTION INC.

BETA-TEX AN OKLAHOMA CORP.

HARPER WAYNE

BENNETT RESOURCES INC.

RAW OIL & GAS INC.

KRF PRODUCTION COMPANY LLC

3D OIL COMPANY LLC

TITAN ENERGY INC.

PATTERSON ENERGY CORPORATION

CRAIG CARL

FIRST ROCK INC.

GINGER PETROLEUM COMPANY INC.

MORRELL W. R.

HINDS PETROLEUM LLC

MOSBACHER ENERGY COMPANY

HOFFMANN OIL COMPANY

LTX OIL COMPANY L.L.C.

DELTA EXPLORATION COMPANY INC.

SAMSON EXPLORATION LLC

LILLIS MICHAEL D.

TEXAS INDEPENDENT EXPLOR. INC.

DAS OIL CO. L.L.C.

SHINNERY OIL COMPANY INC.

H.E.R. OPERATING LLC

GAS PRODUCING ENTERPRISES INC.

ANDERSON PRODUCTION

PUMP-N-PRODUCTION LLC

TALL CITY OPERATIONS III LLC

CARPCO EFFICIENT ENERGY CO. LLC

BUCK WHEAT RESOURCES L.P.

CINRON ENERGY LLC

MINCO OIL AND GAS CO.

GANNETT OPERATING LLC

TEXOMA OIL TOOLS INC.

MLC OPERATING LP

FORTUNA EXPLORATION INC.

HUGHES TEXAS PETROLEUM LTD.

DUNCAN PRODUCTION

RE-OP CORP.

E.G.L. RESOURCES INC.

ARCO OIL & GAS CO.-SILSBEE

TEXAS EMPIRE PETROLEUM CORP.

FLORI-TEX ENERGY CORP.

CARAWAY OPERATING CO.

PED OIL CORPORATION

3B RANCH

DIEKEMPER RAY J. JR.

STINGRAY OIL COMPANY INC.

CAMINO REAL TECHNOLOGIES INC

BARRON PETROLEUM LLC

G. A. HAWKINS OPERATING LLC

SETAB PROD.

LAINCO INC.

ESTATE OF C.B. CHRISTIE JR

DUNCAN LAND & EXPLORATION INC.

JNS PRODUCTION LLC

HUGHES & PATTERSON OPER. CORP.

D90 ENERGY LLC

WYLIE BROS. PROD. & DRGL. CO INC

DAVIS SOUTHERN OPERATING CO LLC

ATHENA RESOURCES INC.

XTRA ENERGY LLC

MID-STATES OPERATING COMPANY

TRINIDAD PETROLEUM INC.

CHITAL PETROLEUM CORP.

WINN EXPLORATION/DULCE COMPANY

HANVEY DON H. OIL INTERESTS INC

NEWBERRY CHARLES

ATLANTIC RICHFIELD CO.-SILSBEE

RICE DRILLING COMPANY

MCCLYMOND INC.

THRESHOLD DEVELOPMENT COMPANY

ALARON ENERGY INC.

CROSSBOW RESOURCES LLC

PERRYMAN OPERATING CO. INC.

CLAUSEN A. G.

SANCHEZ PRODUCTION LLC

CLEAR WATER INC.

LEXGAS INC.

TEXRON OPERATING LLC

MIDLAND ENERGY INC.

RUSK ENERGY OPERATING LLC

LINDENMUTH & ASSOCIATES INC.

O BENCO INC.

SWARTZ OIL COMPANY

TEXAS AMERICAN OIL CORP.

MW PETROLEUM CORPORATION

TEJAS JACK SALES INC.

BRANDY OPERATING LLC

RICOCHET ENERGY INC.

SCHLACHTER DAVID A.

TESUQUE OIL & GAS LLC

SWEET CRUDE OPERATING LLC

A2R RESOURCES LLC

GRAY GORDON OPERATOR

BKJ OIL LLC

GRACE PETROLEUM OPERATING LLC

OAKTREE OIL COMPANY

JEFF DOOLEY OPERATING LLC

J B J OIL PROPERTIES INC.

WINFIELD OPERATING COMPANY

COASTAL PLAINS ENERGY INC.

JOPLIN OIL CO. INC.

DJ & T SERVICES LLC

HEWIT & DOUGHERTY

GOODROCK NATURAL RESOURCES LLC

ROCKER A WELL SERVICE INC.

LODE HOLDINGS LLC

HEADWATERS ENERGY PARTNERS LLC

WESTERN RESERVES OIL COMPANY INC

INTERNATIONAL WESTERN OIL CORP

DRUM OIL & GAS INC.

F. H. B. COMPANY

HEYDRICK PETROLEUM COMPANY

PARK AVENUE RESOURCES INC.

KCS RESOURCES INC.

BAXTER KELLY H.

WIND RIVER ENERGY INC.

HUNT WM. HERBERT TRUST EST.

BSE PRODUCTION CO.

ARRINGTON OIL&GAS OPERATING LLC

TEXANA OPERATING COMPANY

HUMBLE EXPLORATION CO. INC.

L & M OIL CO.

E. T. OIL COMPANY

MADDOX OPERATING

LASMO ENERGY CORPORATION

TEXAKOMA E & P LLC

N & B OIL AND GAS LLC

GOLDEN HORSE GROUP CORP.

TREJIM OPERATORS LLC

WARREN AMERICAN OIL COMPANY LLC

CACTUS GAS & OIL INC.

COLGATE OPERATING LLC

PABLO ENERGY II LLC

J-LYN OIL CO.

GILSTRAP JOEL

LAMAR ENERGY

PURVIS OPERATING CO.

MID-AMERICA PETROLEUM INC.

BROWN GEORGE R. PARTNERSHIP THE

KIMLAR OIL COMPANY INC.

STATEX PETROLEUM INC.

ROSS DWIGHT M. DRLG. CO. INC.

FRONTIER OPERATING CORPORATION

SYNTAX ENERGY CORPORATION

PURE RESOURCES L.P.

PROGENIES OPERATING LLC

SINCLAIR CARL OIL WELL SERVICE

BROOKS E. B. JR.

ADOBE OPERATING COMPANY

WINEGLASS PRODUCTION LLC

CARRIZO (PERMIAN) LLC

SCHENK OIL CO.

TRANSPACIFIC ENERGY LLC

SMC OIL & GAS INC.

BANKHEAD OPERATING CORP.

RABALAIS F.W. INC.

OVERSTREET JAMIE L

DUNCAN DRILLING CO.

MLB OPERATING SERVICES LLC

LONGSHOT ENERGY LLC

ADS OIL & GAS INC.

ALLEDER INC.

FORT APACHE ENERGY INC.

J-TEC OPERATING LLC

LARGO OIL COMPANY

SO OPERATING COMPANY

CASE OIL

CLAVO OIL LLC

GRAWARD OPERATING INC.

CARLOW CORP.

PECOS COUNTRY OPERATING INC.

ENSOURCE INC.

EXPRO ENGINEERING INC.

BANDERA PETROLEUM INC.

MAVERICK PROD. CO. INC.

NORTH SOUTH OIL LLC

PETRO-SMITH OPERATING LLC

KADANE OIL COMPANY

ERGON ENERGY PARTNERS L.P.

LUTEX OIL LTD.

HARPER WILLIAM E. ESTATE OF

ECHOLS OIL COMPANY L.L.C.

ELEVATION RESOURCES LLC

PECOS OPERATING COMPANY LLC

STRAWN PETROLEUM OPERATING LLC

SHADY OIL CO.

WEST TEXAS OPERATING COMPANY LLC

CLARK OPERATING INC.

GREENHAW MORRIS R.

LANEER RESOURCES COMPANY

RHB EXPLORATION & PRODUCTION LLC

ORO RESOURCES LLC

STETSON PETROLEUM CORP.

SENORA RESOURCES INC.

DELTA DRILLING CO.

HUNT PETROLEUM CORPORATION

DEVON LOUISIANA CORPORATION

MYRIAD RESOURCES CORPORATION

FORBES PRODUCING LLC

OAK ENERGY LLC

COLBY PRODUCTION RESOURCES LLC

WFMMS INC.

CRUTHIRD MARK OIL

AMARILLO EXPLORATION INC.

NRM PETROLEUM CORP.

BATSON ENT VENTURES L.L.C.

E.C. HINDMAN OIL AND GAS

WEATHERS EXPLORATION INC.

J & TG LLC

TEXSTAR ENERGY OPERATORS INC.

GENERAL OPERATING COMPANY

H-M RESOURCE MANAGEMENT INC.

THP OPERATING LLC

CATLIN RANDY

ARIES OPERATING LP

SSC INC.

EP OPERATING LIMITED PARTNERSHIP

MR OIL COMPANY

AKEA INC.

OMNI OIL & GAS INC.

CARDWELL OIL CORPORATION

GRAHAM BILL J. OIL & GAS CORP.

VANGUARD OPERATING LLC

FREDCO

BENSON & SCHOEN OIL CO. INC.

SCHKADE HAROLD

ZIVNEY ENERGY

RFE OPERATING LLC

MIRANDA ENERGY CORPORATION

GLORI ENERGY HOLDINGS INC.

LIONHEART ENERGY CORPORATION

JOHN P. BOGDANICH OPERATING LLC

JACK RUSSELL OIL LLC

ARROW OIL & GAS LLC

KALA OIL COMPANY

KEELEY OIL L.L.C.

TACTICAL OPERATING COMPANY LLC

QUESTA OIL & GAS CO.

MOSAIC OIL LLC

PINNACLE MINING CORPORATION

DEVON ENERGY CORPORATION(NEVADA)

BHP PETROLEUM COMPANY INC.

CALTATE ENERGY CORP.

EASTLAND OIL COMPANY THE

D.J.F. SERVICES INC.

GHISELLI OIL INC.

HERD PRODUCING COMPANY INC.

OCEAN ENERGY INC.

GHA BARNETT LLC

CASTLEROCK OPERATING LLC

TEXEGY OPERATING COMPANY LLC

HELTON PETROLEUM

MITO RESOURCES TX LLC

HAZELETT LEASE SERVICE INC.

CONTRAST ENERGY LLC

EQT PRODUCTION TEXAS LLC

IRONHORSE OPERATIONS LLC

BRYMER CONTRACTING INCORPORATED

TEXAS ROYALTY CORP.

CAMINAR OIL & GAS LLC

BARKER PRODUCTION CO. LP

CUSTER & WRIGHT OPERATING INC.

MOONTOWER RESOURCES OP LLC

HANE POWER L.L.C.

WORTHAM OPERATING LLC

LAVANCO ENERGY LTD.

DINERO OPERATING COMPANY

BRIAR ENERGY CORPORATION

JET-STAR CO.

SANTA FE MINERALS INC.

VALLEY PETROLEUM COMPANY

SONAT EXPLORATION COMPANY-MCR

EXCO RESOURCES INC.

BOONDOCKS SOLUTIONS LLC

GRIFFIN RESOURCES LLC

CIRCLE W OIL & GAS COMPANY

SILVER OIL & GAS INC.

MORRIS R. GREENHAW OIL&GAS INC

TARE RESOURCES LLC

T.F. WELL SERVICE L.L.C.

RKW OPERATING LLC

HIPP OIL AND GAS INC.

TEXAS CONSOLIDATED PET. CORP.

DCS ENERGY

X STONE ENERGY LLC.

ARCADIAN MINERAL DEVELOPMENT LLC

PARDUE OIL INC.

IT LL DO OIL COMPANY

C.F.O. INC.

OZ GAS CORPORATION

NORTHFIELD ENTERPRISES INC.

ARKLAND PRODUCING CO. INC.

JAMES DERYL

TEXOMA LEGACY PROPERTIES LLC

PERMIAN DEEP ROCK OIL CO. LLC

MCCUTCHIN PETROLEUM CORPORATION

GIANT NRG CO. LP

HAYS PARTNERSHIP

PAISANO PRODUCTION INC.

REDBUD E & P INC.

SANDRIDGE ENERGY INC.

SUTTON PRODUCING CORP.

ENERGON3

GOODRICH PETROLEUM COMPANY

A&M OIL & GAS LLC

HEADINGTON OIL COMPANY LLC

LOGAS ENERGY LLC

GLAHN RESOURCES INC.

PETROLIA GROUP L.L.C.

SUPA ENERGY INC.

SHELBY BOSWELL OPERATOR LLC

PIMA ENERGY LLC

POOR BOY OPERATING CO.

RED OAK OIL COMPANY LLC

EXCEL ENERGY CO.

ARK-LA-TEX ENERGY L.L.C.

GREENWERKS OUTDOOR SERVICES LLC

SHIDLER MARK L. INC.

HALVEY ENERGY LLC

WISCHKAEMPER JAMES K.

NOG PRODUCTION & OPERATING LLC

HW OPERATING LLC

BETWELL OIL & GAS COMPANY

CRISCO OPERATING LLC

PARAGON OIL & GAS LLC

FOURTH FLOOR OPERATING LLC

NATIONAL COOP REFINERY ASSOC

LANDMASTER PARTNERS INC.

COOPER OIL & GAS INC.

WALTER EXPLORATION COMPANY

TRAP ROCK OIL LTD.

HOUSTON PETROLEUM COMPANY

HAGGARD OPERATING GROUP/OIL

BRANDER SAM H.

TROJAN OIL COMPANY LLC

CHARLES D. SELF OPERATING LLC

H & L EXPLORATION COMPANY LLC

GENNESARET INVESTMENTS LLC

WALKER OPERATING (I)

CULVER & CAIN PRODUCTION LLC

EARTHBOUND RESOURCES LLC

LAMB JAMES L. JR.

WILDHORSE OPERATING COMPANY

LOWRANCE INC.

FIVE K PARTNERSHIP

MISSION ENERGY INC.

CAPROCK EXPLORATION INC.

MOENNING VERNIE

MITCHELL EHRLICH OIL & GAS LLC

OAKMONT OIL AND GAS

MARTIN WELL SERVICE

CHAPCO INC.

CANAN THOMAS C.

CLARK LESTER

KEY PRODUCTION CO.

J&R OPERATING

BASS PERRY R.

BRAMMER ENGINEERING INC.

TAYLOR BEN J. INC.

MACHA ENTERPRISES INC.

QUINOCO PETROLEUM INC.

LINDEMANN W. L. DRLG. CO.

ORIGIN PRODUCTION COMPANY INC.

TAMPKE SERVICE CO.

POROSITY OIL LLC

POWELL PROPERTIES INC.

CALK OIL COMPANY

BHP BILLITON PET(TXLA OP) CO

SUN EXPLORATION INC.

SKS OIL

CONWAY ENERGY OPER SERVICES INC.

RICHLAND RESOURCES CORPORATION

MAXIMUS OPERATING LTD.

JATAM INC.

POGO PRODUCING COMPANY LLC

FORTUNA RESOURCES DVLPMENT LLC

LAMAR OIL & GAS INC.

TRI-FORCE OPERATING L.L.C.

LAROCO LLP

BOWERMAN OIL & GAS INC.

GEO-VEST OF TEXAS INC.

RBD-SHELBY AGENCY

DMV PIPELINE LLC

ICE WELL SERVICES INC.

SCANDRILL INC.

CASKIDS OPERATING COMPANY

CAN T COMPLAIN OPERATING CO.

DUKE M.A. ANDY JR.

RENDOVA OIL CO

J-BREX COMPANY

BLACKMAR JIM OIL OPERATOR

SALMON RAYMOND JR ESTATE

STOVALL HOWARD

BLACKWELL EXP & DEVELOPMENT LLC

JILPETCO INC.

CLAY PETROLEUM

NAUMANN OIL & GAS INC.

JENEX OPERATING COMPANY OF TEXAS

FASKEN DAVID

CHI OPERATING INC.

JTC ROYALTIES LLC

GRENADIER ENERGY PARTNERS II LLC

TRIUM LTD.

AVAD OPERATING LLC

MCCAMMON OIL & GAS INC.

OGDEN RESOURCES CORPORATION

H & M RESOURCES LLC

TRIAD ENERGY CORPORATION

SHAMROCK UPSTREAM ENERGY LLC

HOLLUB LAMBERT DRILLING COMPANY

STAL OIL PRODUCTION L.L.C.

V/J OIL COMPANY

SQUAW MOUNTAIN OIL LLC

SEGURO WELL SERVICE INC.

ALLEN C. L. (DOIE)

HEP OIL GP LLC

STONER OIL

LA VERNIA OIL

L. S. K. L. OIL CO.

MWL ENERGY LLC

NEFF MICKEY OIL COMPANY INC.

UPLAND PRODUCTION COMPANY

DORADO OFFSHORE LLC

NORTHLAND PETROLEUM LLC

B.O.L.D. OIL AND GAS LLC

LYNX ENERGY COMPANY INC.

NOSIVAD OIL INC.

IP PETROLEUM COMPANY INC.

STEPHENS ENERGY CORP.

PETROHAWK OPERATING COMPANY

MACHIN & ASSOCIATES INC.

SUNLIGHT EXPLORATION INC.

VISION OIL AND GAS LLC

ARROWHEAD RESOURCES INC.

MUSTANG OIL & GAS CORPORATION

ROBUCK PETROLEUM LLC

TEXAS CITY REFG. INC.

BETA OIL CORPORATION

ENERGY TWENTY OPERATING LLC

MCDONALD PRODUCTION LLC

BLAKENERGY OPERATING LLC

O.G.P. OPERATING INC.

CREEK ENERGY INC.

REMCO OIL & GAS PRODUCTION INC.

STRAY OIL COMPANY

TEXAS OIL AND GAS OPERATING LLC

THREEWAY DRILLING COMPANY

M-TEX RESOURCES INC.

PAUTSKY NORMAN

PERKINS-PROTHRO COMPANY

TRINITY GAS CORPORATION

MEMORIAL PRODUCTION OPER. LLC

LORAC INC.

ERNMAR INVESTMENTS INC.

BULL OIL COMPANY LLC

SLICK INC.

ENCINA RESOURCES LLC

WARREN AMERICAN OIL COMPANY

DSR OIL & GAS INC.

BELLAH & MATHIEWS

RP OPERATING L.L.C.

MURCHISON OIL AND GAS LLC

HALLIBURTON OPERATING COMPANY

GREEN CENTURY EXP & PROD LLC

WILSON OPERATING CO.

BASIC EARTH SCIENCE SYSTEMS INC.

PAUTSKY JIMMY

SALIDA EXPLORATION LLC

TEXAS INDEPENDENT OIL CO. LLC

B & S SALVAGE

TWIN OAKS CONSTRUCTION COMPANY

J & J YORK

RAINBOW SEVEN OIL & GAS INC.

LAKEWOOD OPERATING LTD.

WAGNER & BROWN

KERN CO.

ZAPATA OIL PARTNERS L.L.C.

FLINT ROCK RESOURCES MGMNT INC.

BLUESTONE NATURAL RES. II LLC

JONES ENERGY LTD.

US. FUELS INC.

MORRIS W. DALE INC.

DAVCO OIL LLC

LONE TREE OIL & GAS LLC

D C OIL COMPANY INC.

BRAZOS RIVER EXPLORATION LLC

WALKABOUT OPERATING LLC

ELLIS EXPLORATION INC.

DARR-HEY OIL LLC

WRANGLER PRODUCTION CO.

JCB II ENTERPRISES LLC

STANDARD OIL COMPANY INC.

LEGACY EXPLORATION LLC I

KOONTZ OIL COMPANY

CAROIL LLC

VANEK R. J.

STAPLES JAMES W. PROD. CO.

C & K PETROLEUM INC.

EL PASO PRODUCTION OIL & GAS CO.

CENTAUR PETROLEUM CORPORATION

CHANDLER OIL & GAS LLC

LUXOR OIL & GAS INC.

AKERS B. F.

SOMERSET INSULATION INC.

WALLS G. M. & FRANCES INC.

C. H. LEVENS INC.

GENERAL ATLANTIC RESOURCES INC.

AGERON ENERGY LLC

LAWRENCE ENERGY COMPANY

BURTON SERVICES INC.

FENOGLIO OIL COMPANY

RSP PERMIAN LLC

H & L OPERATING CO. LLC

JL&M ENERGY LLC

MIDWEST OIL CORP.

CREST RESOURCES INC.

PAUTSKY JIMMY ESTATE OF

GEOSURVEYS INC.

SCHLITTLER WILLARD

GALILEE OIL INVESTMENTS LLC

RAGARS OIL & GAS CO.

CABOT CORP.

DORRIS PETROLEUM INC.

FISHER JACK INC.

MONCRIEF C. B.

MORGAN ENTERPRISES INC.

PATNO OIL & GAS COMPANY

UNION PRODUCING CO.

TEJONES OPERATING CORPORATION

SCANA PETROLEUM RESOURCES INC.

CRESCENT EXPLORATION LLC

HOWARD EXPLORATION INC.

SWENSON BACKHOE SERVICE INC.

TERRAFINA ENERGY LLC

CINCO OIL & GAS LLC

PLACE OIL AND GAS CO.

KUEHNE OIL COMPANY

ZENITH OIL & GAS LLC

SILVER CREEK PERMIAN OP CO LLC

ELEON OPERATORS LLC

CULEBRA OIL & GAS LLC

MAVERICK OPERATING LLC

AB RESERVE LLC

CHARTER OAK PRODUCTION CO. LLC

MHM PIPELINE CO. INC.

BIG IRON EXCAVATION L.L.C.

CREATIVE OIL & GAS OPERATING LLC

MOSMAN OPERATING LLC

S & S OPERATING COMPANY INC.

SPENCE RALPH OIL COMPANY INC.

L-TEXX PETROLEUM LP

HAWKINS G. A.

FLINT INTERESTS LLC

EXPORT PETROLEUM CORPORATION

RUWCO OIL AND GAS CORP.

CLEARY PETROLEUM CORP.

ZEPHYR LONE STAR OPER CO. L.L.C.

DANMARK ENERGY SERVICES INC.

BOSS OPERATING LLC

PIONEER PRODUCTION CORP.

DORCHESTER EXPLORATION INC.

KNOBLOCH ALBERT

CANON OIL AND GAS

RIDGLEA ENERGY I LLC

SOUTHERN EXPLORATION INC.

BECHTEL INVESTMENTS INC.

ELECTRAGAS INC.

PARKER ENERGY COMPANY

SIMCO OIL LLC

BURGUNDY OIL & GAS INC.

ABERLOUR OPERATING INC.

MONADNOCK RESOURCES OP CO LLC

HOWARD OPERATING CO.

WHITEHEAD RESOURCES LTD.

THREE-C OIL AND GAS

HULEN OPERATING COMPANY

DENTON EXPLORATION INC.

TREE OPERATING LLC

AC EXPLORATION LLC

BYRNE OIL COMPANY

JACKSON JERAL W. INC.

BAH-PEPPER OPERATING LLC

SOUTHERN ALLIANCE OIL CORP.

GREEN ROY W. OIL & GAS

YOUNG JOHN H. INC.

SANDALWOOD EXPLORATION L.P.

HEDRICK PRODUCTION INC.

MGM OIL & GAS COMPANY

MID-CONTINENTAL EXPLORATION INC.

CARIBOU OPERATING INC.

P&B PETROLEUM LLC

PETRUS OPERATING CO. INC.

TAUBERT & STEED

SEAGULL ENERGY E&P INC.

COLUMBIA GAS DEVELOPMENT CORP.

DOWNING MARK

BENNETT PATRICIA

FLAMINGO OIL & GAS

JET-TEX OIL & GAS LLC

CHAMBERS R. H. LLC

ROHMER RESOURCES LP

GUINN OIL COMPANY

GUINN OPERATING COMPANY LLC

AXIS ENERGY CORPORATION

DAVIS DON OIL CO.

HOGGARD KENNETH

JAD OIL INC.

GENIE OIL COMPANY A

CLARK JOHN M. INC.

CHEK OIL CO. LLC

MORGAN CREEK PRODUCTION CO. INC

W.W. ENERGY

BLUESTEM ENERGY HOLDINGS LLC

WHEELER ENERGY LLC

SPECIAL ENERGY CORPORATION

ADEXCO OPERATING COMPANY

PRO-SYSTEMS FAB INC.

SMITH RESOURCES L.L.C.

IRA TESTERS

PHOENIX HYDROCARBONS OPERATING

CH4 ENERGY SIX LLC

BRA-DE OIL & GAS OPERATING LLC

LALOC

D. O. G. OPERATING LLC

YATES ENERGY CORPORATION

NEW HORIZON INVESTMENTS LTD.

BENNETT MILLS ESTATE

TRYMA OPERATING

NAVAJO OIL AND GAS LLC

LEFT BEHIND RECOVERY LLC

JOY RESOURCES INC.

PAR MINERALS CORPORATION

MAP PRODUCTION CO. INC.

ASSOCIATED OPERATING & EXPLOR.

DORFMAN PRODUCTION COMPANY

DALLAS ROYALTY INC.

S & D OPERATING COMPANY INC.

INDIAN OIL LTD.

NBX ENERGY LLC

CARY OIL & GAS INC

HART & MCFARLAND

FIVESTONES ENERGY LLC

WHEELER W. RIDLEY EST.

VISION NATURAL RESOURCES LP

JIMCO ENERGY INC.

MEADOR T. C.

JULANA OIL & GAS

BIG STATE INDUSTRIES INC.

MAKAR PRODUCTION COMPANY

KENWORTHY OIL COMPANY

QUESTA OPERATING COMPANY LLC

STRATA OPERATING INC.

STRAWN OPERATING CO. L.L.C.

RAYDEN

R.J. RILEY OPERATING LLC

WILLIFORD ENERGY COMPANY

CYCLONE EXPLORATION INC.

J&H OIL COMPANY

ABC NRG

BLUE WING ENERGY INC.

LIGHTNING OIL COMPANY

SKLAR EXPLORATION COMPANY LLC

SOUTHEASTERN PIPE LINE COMPANY

CHAPMAN EXPLORATION INC.

LONE STAR OIL & GAS

MUNSON DAVID M. INC.

ARKLA EXPLORATION CO.

GOOCH & ISOM

HORNE & MOORE OIL CO.

JERRY BARNETT & SON

GILSTER RALPH R. III

TEXLAND/JMC JOINT VENTURE

WILLS OIL HOLDINGS L.L.C.

WALBET INC.

SMITH OPERATING AND MGMT CO.

URSUS OIL AND GAS

JOE R. CHEATHAM OIL COMPANY

RIMFIRE RESOURCES LLC

CARTER CATTLE & CRUDE COMPANY

LITTLE OIL & GAS

ENERGETICS INC.

GLASSELL PRODUCING COMPANY INC.

SCRANTON EXPLORATION

SIGNAL OIL & GAS COMPANY

CENTEX PIPE & EQUIPMENT INC.

D. W. R. OIL CO. INC.

E P C OIL & GAS INC.

TOP O TEXAS PRODUCTION CO.

COLLIER OIL FIELD SERVICES INC

TEXSTAR OPERATING INC.

RLS OIL COMPANY

HYDROCARBON OPERATING INC.

T&D OIL

MILLER OPERATING COMPANY LLC

STUBBLEFIELD ENERGY COMPANY

SADDLE RIM ENERGY (TEXAS) LLC

SDX RESOURCES INC.

DUNIGAN OPERATING COMPANY INC.

ELLARD OIL

LINDSAY DICK

LAVANCO ENERGY INC.

RINGO RIG LLC

NADEL AND GUSSMAN L.L.C.

MCDONNOLD OPERATING INC.

RMR OPERATING LLC

WILCOX OPERATING CORPORATION

HOLCOMB ENTERPRISES

FENN BILL INC.

BRIDGE OIL PRODUCTION CO. INC.

TANA OIL & GAS CORPORATION

SOUTHWEST RESOURCES INC.

BRIGADIER OPERATING LLC

BOUNTY PRODUCTION COMPANY

CAMPBELL L. W.

BLUE QUAIL ENERGY LLC

LPR ENERGY LLC

DONNY STELZER OPERATING LLC

DLB OIL & GAS INC.

SCHNEIDER ENERGY EXPLORATION INC

WOLF GENE L.L.C.

ADENRYEN LTD. CO.

GIEBEL PETROLEUM LTD.

FORD R. J. INC.

KELLERVILLE OPERATING LLC

PENNANT DEV. AND PROD. LLC

FENOGLIO ENERGY PRODUCTION LLC

PARKS RHONE INC.

CM TX PRODUCTION LLC

HOLLEY OIL COMPANY LLC

TAURUS EXPLORATION U.S.A. INC.

MORANSCO ENERGY CORPORATION

JOHNSON & MORRIS

OWL CREEK OPERATING CO. INC.

BLACK S OIL & GAS

SAMMY MITCHELL INC.

NEWTON OPERATING & CONSLTNG LLC

OKIE OPERATING COMPANY LTD.

NORTH TEXAS OIL & GAS LLC

CIVCO OPERATING LLC

SARITA ENERGY RESOURCES LTD.

NEWARK E&P OPERATING LLC

R & R WELL SERVICE INC.

LANDRETH ROBERT E.

ATKINS PETROLEUM CORP.

ATASCO INC.

FOAG INC.

TURNING POINT OIL INC.

BENSON W. R.

TEXAS UTILITIES FUEL CO.

LEWIS HEIRS 480 LLC

CLOVER OIL & GAS INC.

HERRMANN J.B.

KRAMER FRANK C.

PRIORITY OIL COMPANY LLC

HOWELL CRANE & RIGGING INC.

LOG OPERATING LLC

DARRAH OIL COMPANY L.L.C.

TRICORE OIL & GAS CORPORATION

UNDERBRINK OIL

D.W.P. PRODUCTION

DENNIS & DAVIS OIL CO.

WHISKEY RIVER OIL & GAS LLC

OILROX RESOURCES LLC

SPALDING ENERGY INC.

MJB PRODUCTION COMPANY INC.

REACH OIL

SIMMONS L.B. ENERGY INC.

BGM PRODUCTION LLC

ESCUDO OIL & GAS LLC

RICKAWAY ENERGY CORP.

LEHNERTZ-FAULKNER INC.

KOUATLI AIMAN M.

PERRY OPERATING INC.

SIETE OIL AND GAS CORPORATION

ZACHRIS INC.

BESCO OPERATING L.P.

TRADITION RESOURCES OPER LLC

PRESTONWOOD WF LLC

K2 PETROLEUM INC.

MALLARD EXPLORATION INC.

PRODECO EXPLORATION INC.

MILLER ENERGY INC.

FOREE OIL COMPANY

WISE OIL GROUP OPERATING LLC

ANDERSON ENERGY CORPORATION

OZTX OIL & GAS L.L.C.

GEMARMI INC.

L & J EXPLORATION LLC

JET OIL PRODUCERS INC.

EXCEL OIL & GAS INC.

MCGOWAN WORKING PARTNERS

HUNT HASSIE EXPLORATION COMPANY

PRIZE OPERATING COMPANY

WEAVER GLOBAL OPERATING LLC

DURANGO OPERATING CO. INC.

BURK-GUNN OIL CO.

RUSSELL OPERATING COMPANY LLC

BOLDING ENERGY LLC

TRI-W OIL

MSD OPERATING LLC

POINT ENERGY PARTNERS PETRO LLC

FMD OIL CO.

LANG ENERGY LP

REDEMPTION OIL & GAS LLC

SLAGEL H. P. PROD. CO.

HUBBARD OPERATING

EUREKA PROSPECTING COMPANY

BRENHAM DRILLING CO.

PASCHAL PHIL A.

JB OIL & GAS WELL SERVICE

A A PRODUCTION INC.

MATADOR OPERATING LLC

DEPCO INC.

SADDLE CREEK OIL LLC

DJ OIL COMPANY INC

BLUCO PRODUCTION CO. INC.

HEIGHTS ENERGY CORPORATION

MERRITT OPERATING INC.

TEJAS PETROLEUM RESOURCES LLC

DRACHEN OIL COMPANY

ANDERSON DORMAN

ALCO OIL COMPANY

MALONE OIL PRODUCTION

DIAMOND A INC.

SOIL ENERGY INC.

TWCS OPERATING CO. LLC

EXTECH OPERATING LLC

SPONTE OPERATING INC.

RS & LS MANAGEMENT L.L.C.

TUMBLEWEED ENERGY LIMITED

MIDSTATES PETROLEUM COMPANY LLC

RBR OPERATING INC.

E R OPERATING COMPANY

A & C OIL COMPANY LLC

BRONCO OIL COMPANY

VICTORY OIL & GAS INCORPORATED

BACHTELL OIL & GAS LTD.

ALCORN JERRY D.

ERWIN OIL COMPANY

ROYALTY LAND & DEV. CO. INC.

RK OIL PRODUCTION

HENRY PAUL PETROLEUM LLC

G D ENERGY CORPORATION

BLUESTAR ENERGY INC.

BPA OILFIELD SERVICES

STONEBRIAR OIL LLC

MAYJAC I LLC

WAGGONER-BALDRIDGE OPER. CO INC

LANDRUM WEST INC.

SIOUX NATURAL GAS CORPORATION

QUINTX EXPLORATION INC.

WINCO OIL INC.

REESE WELLSITE SUPERVISION LLC

G-M-K OIL CO. INC.

LECLAIR OPERATING L.L.C.

EL PASO PRODUCTION COMPANY

KEY PRODUCTION COMPANY INC.

LONE STAR PRODUCTION

TEXCEL EXPLORATION INC.

MARALO LLC

JRP PRODUCTION LLC

BALD EAGLE OPERATING INC.

RIO OIL AND GAS (PERMIAN) II LLC

MARTIN FOREE OPERATING II LLC

SWANSON TOMMY OIL CO. INC.

PETRALIS ENERGY RESOURCES LLC

CAZADOR OPERATING LLC

CPMAK INVESTMENTS INC.

HILLWOOD O & G OPERATING CO LP

CINNABAR OPERATING LLC

WB MULLIN OPERATING LLC

P & R OIL COMPANY

THUNDERBIRD OPERATING L.L.C.

SOUTHLAKE EXPLORATION INC.

TRADITION RESOURCES LLC

BOB HUGHES OIL COMPANY LLC

NORTHFORK EXPLORATION LLC

ENERFIN RESOURCES II-92 L.P.

BEE-JAY PETRO INC.

RWS OPERATING CO. LLC

FIRST AMERICAN OIL & GAS INC.

CJW OPERATING CO.

CORSICANA FIELD FUND

DENALI PETROLEUM LLC

WATSON OIL & GAS INC.

WYLIE FRED JR.

NADSOILCO LLC

CORONADO MINERALS LLC

WES-TEX OIL CO. (I)

WAPITI OPERATING LLC

LANDMARK EXPLORATION INC.

LEASE HOLDERS ACQUISITIONS LLC

TX HEAT OF THE PERMIAN BASIN INC

POP OPERATING COMPANY

J N R INC.

JMH PRODUCTION LLC

STOLTZ WAGNER & BROWN

CK OPERATING COMPANY LLC

K.A. BARNES OIL & GAS OPER LLC

BEAR CREEK ENERGY LLC

ONE NICKEL OPERATING LLC

PRESSLY OIL INTEREST INC.

PBEX OPERATIONS LLC

ROBERTSON FRENCH M. OIL CO.

GUARDIAN ENERGY OPERATING CO LLC

SFM HOLDINGS INC.

BRALEX OPERATING LLC

RONNING GAS AND OIL LLC

TEXLA OPERATING CO

MULLOY OPERATING INC.

SAN DIA PRODUCING COMPANY

DIAMOND BIT OIL LLC

SHENEEDA ENERGY LLC

FELTY PRODUCTION INC.

LLT ENERGY INC.

DAILY CARROLL

DISCOVER OIL & GAS INC.

3 H WELL SERVICE INC.

LARRON ENERGY CORPORATION

WATSON OPERATING COMPANY

ROBINSON EUGENE J.

R.T.C. RESOURCES L.P.

LP OPERATING LLC

COLESHIRE OIL & GAS CO. INC.

PALO DURO RESOURCES LLC

IKARD ALAN

ELDON OIL CO.

HERRMANN S. W. OIL & GAS

LEWIS T. K.

NFR ENERGY LLC

SENDERO ENERGY INC.

BOMCO USA INC.

TR OFFSHORE LLC

PARTEN J. R.

MDC OPERATING INC.

VAUGHN PETROLEUM INC.

UPCURVE ENERGY LLC

M & M PRODUCTION LTD.

MARBIL OIL LLC.

TOPPER OIL COMPANY

SANTA ANNA OPERATING 3 LLC

BRILEY OPERATING LLC

KRISCO OIL CO.

DENPAC CORPORATION

B.O. OIL COMPANY

JEFFCOAT PRODUCTION COMPANY INC.

DARKENS OIL & GAS INC.

DPMP ENERGY LLC

NECHES EXPLORATION L.L.C.

ESTEP OPERATING LLC

ELCO OIL & GAS INC.

CRESLENN OIL COMPANY

PALADIN PETROLEUM III L.L.C.

KALOS CORPORATION

IRION CORPORATION THE

GUY JULAINE

ROWLAND TANK TRUCK COMPANY

TCS PETROLEUM CO. LLC

SUBSEA OPERATING CO.

WOOD MCSHANE & THAMS

TESORO PETROLEUM CORPORATION

WTI OPERATING LLC

PENNY RALPH E.

BP OPERATING COMPANY LLC

LADD OIL & GAS CORPORATION

AMES OIL

FOYORO ENERGY LLC

AMINOIL USA INC.

BIG LAKE CORPORATION

SABINE OIL & GAS LLC

GHR ENERGY CORP.

MEGO RESOURCES LLC

JBR-FINLEY WELLS LLC

PURSLEY GAS COMPANY

HANKS CHRISTOPHER GLENN

BURLINGTON RES O&G CO-PERMIAN

JLW OPERATIONS LLC

BLACK CREEK OIL COMPANY LLC

CARTER A.J. PRODUCTION CO.

KSABE ENERGY PARTNERS LLC

KEIRUS INC.

FORT WORTH PRODUCTION CO.

WILSON RESOURCES INC.

CAPITOL WELL SERVICING CO. INC.

CHASLA ENERGY LLC

FRANKS PETROLEUM INC.

CIRCLE D OIL & GAS INC.

STARR OPERATING LLC

WOLFCAMP ENERGY LLC

PLATFORM OPERATING LLC

NECHES OIL & GAS COMPANY INC.

DRAKE OIL & GAS LLC

HOLLIDAY CSG CORP.

ELK MEADOWS RESOURCES LLC

LEVISAY OPERATING CO.

VOSKAMP EXPLORATION INC.

CL&F OPERATING LLC

TRIANGLE P DEVELOPMENT CORP.

ETOS OPERATING INC.

CORPENING A. V. JR.

J & J WHITESIDE INC.

LEEJAN OIL COMPANY

FLINT PIPELINE COMPANY

GREEN RIVER RESOURCES INC.

LEONARD J. A.

B & S OPERATING COMPANY LLC

NEWGULF PETROLEUM LLC

GRAVES OPERATING LLC

RICHLAND ENERGY INC.

H & L OPERATING COMPANY

LINN OPERATING LLC

NEWMAN & SCOTT

NORAMCO PRODUCTION LLC

CG OIL CO.

KARST INCORPORATED

MADDOX ENERGY CORP.

EARNEST PRODUCING CORPORATION

MARIAH ENERGY CORP.

MESA OPERATING LTD PARTNERSHIP

SILVERBROOK OPERATING LLC

SMYTH OIL LLC

CHAPARRAL OPERATING INC.

FIELDS OIL & GAS COMPANY LLC

WHEELER DRILLING CO. INC.

JACKSON OIL COMPANY

HENDERSON NATURAL RES L.L.C.

MERIDIAN OIL INC.-MIDLAND

O DELL MITCHELL

BTO VENTURE INC.

G. H. RANCH LLC

PRESCO

LINDOW OIL & GAS LLC

BAILEY L. J.

MAKO EXPLORATION MANAGEMENT LLC

NORVEL DOUGLAS OIL INC.

GREWING HERMAN OPERATING INC.

VANYA OIL & GAS INC.

JF TRUST

GINSWEET OPERATING INC.

HADDAD BOYNTON LLC

BOCKHOFF DEBORAH M.

SCALA ENERGY OPERATING LLC

PALEO OIL COMPANY LLC

IRONROC ENERGY

J.P. OIL COMPANY INC.

PAR DEVELOPMENT

TAG OPERATING COMPANY INC.

ADAMSON EXPLORATION CO.

ARRCO OPERATING LLC -

GLOSSOP OIL & GAS LLC

O LEARY S OIL & GAS INC.

MILLER C. R. OIL CO.

SOUTHLAND ROYALTY CO.-MIDLAND

WOODS OPERATING CO. INC.

VETERAN EXPLORATION & PROD LLC

KANON OIL LLC

LADDEX LTD.

COASTAL MANAGEMENT CORPORATION

BURNS P. C. OIL PRODUCERS INC.

WILLIS OPERATING COMPANY INC.

MNA ENTERPRISES LTD. CO.

ICKERT ENTERPRISES

DENTECO OIL COMPANY LLC

PIONEER RESOURCES PRODUCING L.P

BBX OPERATING L.L.C.

H&G PETROLEUM CORPORATION

FIRSTRIKE ENERGY CORPORATION

CROSSTEX SERVICES L.L.C.

STAR-JET CO.

JAVELINA OIL & GAS CO.

LANGFORD PRODUCTION COMPANY LLC

US ECOLOGY WINNIE LLC

T DOZER D OIL CO.

LACY OPERATIONS LTD.

LITTLE QUINTIN COMPANY INC. THE

MASCOT OIL COMPANY

PARKER & PARSLEY INC.

MESSY OIL AND GAS LLC

CHASS PRODUCTION CO.

BAR-MAC INVESTMENTS INC.

PARTIN CHARLES

BRIARCREEK OPERATING LLC

CREED OPERATING CO. LLC

SOUTH TEXAS OPERATING COMPANY

PULS W. L.

AMOCO PRODUCTION CO.-LEVELLAND

AKG OPERATING COMPANY

WALTON PRODUCING COMPANY

HALL E.G. OIL CO. INC.

MIDWEST OIL CORP. RENAUD TUNST

LULING WELL SERVICE

RUTH-GARD

TRIPLE G OPERATING LLC

R&K OIL CO.

OATES JOHN CO. INC.

BRONCO-MEDINA OIL CO. INC.

BL PRODUCTION LLC

JOHNSON & LINDLEY LLC

DACO INC.

FED OPERATING LLC

SHAIDA JOHN H.

LONGFELLOW ENERGY LP

GRIFFIN ENERGY HOLDINGS LLC

BATTON OIL & GAS LLC

PRODUCERS ENVIRONMENTAL SER. INC

PIE OPERATING LLC

PALRICH OIL CORPORATION

SIMATA ENERGY LLC

HORIZON RIDGE OIL COMPANY

STAGG OPERATING INC.

HOLMES EXPLORATION LLC

MOORE COUNTY GAS PARTNERS L.P.

FOUNDATION OIL COMPANY INC.

SOUTHERN OIL OF LOUISIANA LLC

OIL PATCH OPERATORS CO. L.L.C.

NORTH TEXAS ENERGY INC.

E2 OPERATING LLC

PROVIDENCE OIL PROD.

ASHLAND EXPLORATION INC.

SAFARI PRODUCTION COMPANY INC.

WILL-DRILL PRODUCTION CO. INC.

TAB OPERATING INC.

MWWD OPERATOR LLC

LYNN CREEK OIL COMPANY

MID-CON ENERGY OPERATING LLC

ARALUEN ENERGY INC.

ROCK OPERATING

SYDSON ENERGY INC.

TOM-TOM OPERATING LLC

PERMIAN NATURAL RESOURCES

PEGASI OPERATING INC.

WISENBAKER PRODUCTION COMPANY

PEBA OIL & GAS CO.

CASS-STEPHENS

AMERICAN WEST

GIBBS JAMES A.

COLLINS & WARE INC.

BIRD CREEK RESOURCES INC.

RATTLESNAKE MOUNTAIN OIL LLC

BOLLINGER DRILLING CO.

CAITHNESS CORP.

RANDA OPERATING INC.

J RICO OIL LLC

DUNCAN OIL PROPERTIES INC.

EAGLE ENERGY RESOURCES LLC

ROMINE OIL & GAS LLC

TNCH LLC

PICK OIL & GAS LLC

SEIGUF OIL COMPANY INC.

RABCO ENERGY

LAMB & MIZE

HRUBETZ OPERATING COMPANY

CUDE JAMES W. OIL

CADDELL WELL SERVICE INC.

SHARP CHERRY L

COERT HOLDINGS 1 LLC

TALOS GULF COAST ONSHORE LLC

LACKEY WILLIAM H. OIL AND GAS

MC GLOVER LLC

SYMANK STEVE

AMTEX ENERGY INC.

VANTAGE OPERATING LLC

SCHMID PROPERTIES INC.

RAINWATER JOHN

BROWNING L. P.

7-IRON OIL & GAS LLC

EDDIE S ROYALTIES INC.

EVERGREEN OPERATING CO. LTD.

O.G.O. REFINING

FRIO RESOURCES LLC

KRC OPERATING LLC

4 J S PRODUCTION

BARBER B. S.

TRANSOCEAN OIL INC.

RAVEN FOREST OPERATING LLC

SIERRA RESOURCES LLC

KINNEY INCORPORATED

RIDGE PETROLEUM INC.

DAKOTA RESOURCES INC. (I)

HEROD BILL

NICKI T OIL & GAS LLC

PULS OPERATING COMPANY

LYNN CREEK ENERGY

4-B

ODUM OIL & GAS CO.

TEX-OK ENERGY LTD PARTNERSHIP

ENCORE OPERATING L.P.

BLUE OIL INC.

COPANO COMPANY

HORTON OILFIELD SERVICES

RAMPART PETROLEUM INCORPORATED

GEMINI EXPLORATION COMPANY

ATLANTIC OPERATING INC.

HARDROCK RESOURCES INC.

BURNS P. C.

DOMINION MINERALS CORPORATION

COLLIER W. D. RANCH

MARTIN MATRIX INC.

MONGOOSE ENERGY LLC

DRIFTWOOD ENERGY OPERATING LLC

MIDVILLE ENERGY LLC.

AP OPERATING INC.

CONDOR OPERATING CO.

CEDAR BEND OIL COMPANY

ANEJO PRODUCTION LLC

PERRYMAN OPERATING CO.

ELEMENT PETROLEUM OP III LLC

PATRICK PRODUCTION COMPANY

CIRRUS EXPLORATION COMPANY

REDMAN OPERATING COMPANY LLC

ABARTA OIL & GAS CO. INC.

SOUTH LEEVILLE LLC

BRC OPERATING COMPANY LLC

MARKET STREET ENERGY INC.

DONALU OIL

BLACKWELDER OIL

MISENER OPERATING INC.

GREENSTONE ENERGY LLC

RAPTOR PETROLEUM DEVELOP LLC

LARIAT LAND & EXPLORATION INC.

FOREST OIL PERMIAN CORPORATION

SANTA ROSA OPERATING LLC

SINGER OIL & GAS COMPANY INC.

WIL-MC OIL CORPORATION THE

WOODSTOCK OIL CORP.

FLYING W RESOURCES LLC

ONEILL JOSEPH I. JR.

CRAWLEY PETROLEUM CORPORATION

FINGER OIL & GAS INC.

HAMMAN BLAKE

CENTEX ENERGY LLC

BODDEN PRODUCTION

EMBREY OIL PRODUCTION CO.

O. H. B. INC.

CROWN PETROLEUM CORP.

CAMERON EXPLORATION INC.

MBR RESOURCES INC.

PARNELL OPERATING

FUEGO ENERGY LLC

SKYTOP OIL & GAS

APACHE OIL COMPANY

UNION OIL COMPANY OF CALIF-VAN

WILTON OPERATING

JENKINS R. D.

ZEPHYR PETROLEUM COMPANY

SS OPERATING LLC

JOHANSON OIL

HILLTOP PETROLEUM LLC

PEDEN ENERGY INC.

CHESTNUT MOUNTAIN ENERGY LLC

J. D. GAS INC.

SHEER ENERGY LLC

SANTA FE SNYDER CORPORATION

D & N OIL CO.

PETROTX OPERATING LLC

CARTEX PRODUCTION

KIDD BARRON

HAMILTON CLAY

CONDOR OPERATING COMPANY LLC

WILLIAMS W. R. INC.

P4 OPERATING LLC

PALADIN OPERATING

BRYANT W. H.

CALLEY & FOWLER

LZS CORPORATION

RVS OIL COMPANY

ICA ENERGY OPERATING L.L.C.

PINNACLE OPERATING COMPANY INC.

RICHEY PROPERTIES INC.

RISTER OIL&GAS INTERNATIONAL LLC

STEPHENS MORRIS

MICRO OPERATING INC.

K & S OIL & GAS COMPANY LLC

FIN ENERGY LLC

VESTAL L. D. OIL COMPANY

GEN-SHER L.L.P.

STOVALL TROY

D & B OIL COMPANY

C2 RESOURCES LLC

SILVER FOX OIL & GAS LLC

VT VISTATEX ENERGY LLC

GLASSELL ALFRED C. JR.

RATLIFF OPERATING CORP.

RIFE OPERATING LTD.

OBLAEN RESOURCES LLC

GALLOWAY ENERGY CO.

BRAHMAN OPERATING L.L.C.

WILLIAMS PETROLEUM COMPANY

XOG RESOURCES LLC

AUSTIN MINERALS INC.

CANYON OIL & GAS LLC

HOUSTON GULF ENERGY CORPORATION

DAVIS BROS. OIL PRODUCERS INC.

GARY PERMIAN LLC

JONES EDWIN M. OIL CO.

CERBERUS ENGINEERING LLC

MATHIS & SONS INC.

PENNZENERGY EXP. & PROD. L.L.C.

PETROEDGE OPERATING IV LLC

CAT TREE OPERATING L.L.C.

DAWSON B G OIL & GAS LTD

CAMEO OIL COMPANY INC.

DURANGO PRODUCTION COMPANY INC.

WARREN JOE H.

OLD UNION OPERATING COMPANY

FOUR STARR PRODUCTION LLC

ROB-JOE GAS & OIL CO.

BEAN & BEAN INC.

J R CO. OF MUENSTER LLC

GROTHUES G B OIL

W. B. D. OIL & GAS COMPANY

CHRISTMANN & WELBORN

FORZA OPERATING LLC

SER E&P INC.

REBEL PRODUCTION COMPANY

GOLDSMITH OPERATING LLC

CIRCLE H OIL COMPANY

KLASSEN ENERGY INC.

LKM OIL & GAS

D & H OIL

MANZANITA OPERATING LLC

FOSTER RANDY

GREAT BASIN WELL SERVICE CORP.

SHAPPELL OIL COMPANY

BIRD E&P LLC

CORTEZ OIL INC.

ENGAS XP LLC

HODGDEN JACK D.

RILEY EXPLORATION LLC

AMHERST ENERGY HOLDINGS LLC

JENEX PETROLEUM CORPORATION

WINGROVE WELL SERVICE INC.

KENNEDY R. R. PRODUCTION INC.

CUBA JOHN H.

FRANCES OIL CO.

CLAUDE-MAGGIE CO.

DIXON MANAGEMENT CORP.

MCNALLEN OIL CO. INC.

VERDUGO-PABLO ENERGY LLC

SPICEWOOD OPERATING COMPANY LLC

LOUDON OPERATING COMPANY L.L.C.

CHANCE ENERGY CO. INC.

AMIGO OIL CO.

ZELAYA OIL AND GAS LLC

C6 OPERATING L.L.C.

STONE CHRISTOPHER J.

TURNER PRODUCTION

UNITED PETROLEUM & GAS INC.

D C ENERGY INC.

MINIHAN OIL & GAS CORPORATION

VAST OIL TX OPERATING LLC

BASIN OIL & GAS OPERATING LLC

WARRIOR RESOURCES INC.

ARBOL RESOURCES INC.

DILLARD A. W. JR.

BRAC OIL

MILLER REX M.

BIG GAS OIL LLC

BRUCE OGLETREE LLC

TEJAS PETROLEUM CORPORATION

JTL OIL COMPANY LLC

ENEXCO INC.

WHITE ROCK OPERATING INC.

ROWLAND REX D. ESTATE OF

BRASK-DUMONT RANCH INC.

LEVANT ENERGY LLC

DEVON PETROLEUM CORP.

SHOOTIN STAR OIL L.L.C.

JETTA PERMIAN LP

NEW CENTURY OPERATING LLC

CLR GAUGING CORP.

EV FLEMING ENTERPRISES LLC

KIMBELL INC.

BVX OPERATING INC.

3 AMIGOS OIL CO.

FROST CYRUS B. JR.& FLEMING WM.

OK ARENA OPERATING COMPANY

RALYN CORP.

MAVERICK BROTHERS OPERATING INC.

FOUR H OIL PROPERTIES

POST OAK OPERATING LLC

MUD CREEK OPERATING LLC

U S ENERGY CORP. OF AMER. INC.

RAWLINS OPERATING COMPANY LLC

STRAWN PARTNERS OPERATING LLC

ROCA OPERATING INC.

MILLENNIUM EXPLORATION CO. LLC

ESTATE OF JEROME B. HERRMANN

RUTHSON ENERGY INC.

FAIRWAY RESOURCES OPERATING LLC

LT OIL COMPANY

JADE ENTERPRISES INC.

JACKSON OIL

POLK PETROLEUM INC.

CMS OIL AND GAS COMPANY

SOUTHWESTERN ENERGY PROD. CO.

3 W OIL & GAS

LOMAK PRODUCTION COMPANY

TLH PRODUCTION LLC

G.& S. LANDSCAPING INC.

POCO LLC

TANOS EXPLORATION LLC

COLEMANITE INC.

PURSUIT OIL & GAS STX LLC

DAWKINS ENERGIES INC.

T. L. J. INCORPORATED

CARRUTH OIL & GAS LLC

WOLFE OIL COMPANY

MILLER CECIL G.

SAN JUAN EXPLORATION COMPANY

RAW PRODUCTION

H & T EXPLORATION INC.

CARRIZO (EAGLE FORD) LLC

HENDERSON BRYAN CO.

KNEUPPER OIL LLC

JACO INC

RUSSELL L. J. OIL COMPANY

WERNETTE LOUIS J.

ACIERTO RESOURCES COMPANY LLC

HOMBRE OIL CO. LTD.

DALYN OIL COMPANY

NECHES TRANSPORT INC.

ADAMS LYNN V.

COFER & CRAWFORD

CHAMP OPERATING COMPANY

LAY WARREN LEON

B & R OIL INC.

CALISTOGA ENERGY RESERVES LLC

BOWERS SIGNS

REDBIRD OILFIELD SERVICES CORP.

LAGUNA OPERATING LLC

OIL PRODUCERS INC. OF KANSAS

ADDAX OPERATING LLC

GENESIS EXPLORATION LLC

CORETERRA OPERATING LLC

VAN TOL OIL

TRIPLE H PRODUCTION

JAMES OPERATING

CHMELAR EUGENE OIL & GAS

RED CHALK RESOURCES LLC

AT OIL & GAS LLC

PIONEER EXPLORATION LTD.

MCDONALD RESOURCES LLC

RVR OPERATING LLC

2-K OPERATING

ARRINGTON PRODUCTION COMPANY

LINEAGE OIL LLC

CTL PRODUCTION INC.

DAVIS J. R. OIL COMPANY

GLG ENERGY L.P.

TUCKER PETROLEUM INC.

TSAR OPERATING COMPANY

ORINGDERFF ALMA OIL PROPERTIES

C & G TRANSPORTS INC.

BUCK PRODUCTION CO.

NORTH FORK PETROLEUM LLC

ELLIS DRILLING CORP.

EEX CORPORATION

TIPCO OPERATING CO.

CREST ENGINEERING SERVICES INC.

C&P RESOURCES OPERATING CO LLC

OWL CREEK PRODUCTION CO. INC.

HILLCREST PETROLEUM LLC

T W CLEMONS OPERATING CO. LLC

LAKESHORE OPERATING LLC

NORTH COUNTRY ENERGY LLC

TE-RAY RESOURCES LLC

SUGAR ENTERPRISES LLC

BECHTEL ENERGY RESOURCES CORP.

GULFTEX ENERGY LLC

EAGLE VALLEY DEVELOPMENT LLC

STRATEGY OPERATING LLC

PETROEDGE CONTRACT OPERATING LLC

MCGEE DRILLING CORPORATION

WANDOO ENERGY LLC

SEEK ENERGY LLC

TEXIAN OPERATING COMPANY LLC

SEI OPERATING LLC

JTEX OIL COMPANY LLC

SM OPERATING COMPANY LLC

SUMMIT DISCOVERY RESOURCES LLC

ELK RIVER RESOURCES LLC

SANDPOINT OPERATING LLC

TITUS OIL & GAS PRODUCTION LLC

PONDEROSA OIL & GAS LLC

ADVANCE ENERGY PARTNERS LLC

PAYROCK II LLC

FRISCO PETROLEUM MANAGEMENT LLC

MCM OPERATING LLC

ENSIGHT IV ENERGY MANAGEMENT LLC

ROCKY CREEK RESOURCES LLC