Energy Personnel
Energy Company Directory

Crude Oil Natural Gas Exploration Production

If you are aware of a Crude Oil, Natural Gas, Exploration and Production Company that should be added to the list or a necessary correction please let us know via CrudeOilNaturalGasExplorationProduction@EnergyPersonnel.com

       
3TEC Energy Corporation / Plains Exploration & Production Company (PXP) Houston Texas USA
A.G. Andrikopoulos Resources, Inc. Cheyenne Wyoming USA
A.I.S. Resources Limited
Calgary Alberta Canada
A.P. Moller - Maersk Group Copenhagen Denmark
Abraxas Petroleum Corporation San Antonio Texas USA
Abu Dhabi National Oil Company (ADNOC) Abu Dhabi UAE
Acclaim Energy Trust / Canetic Resources Trust Calgary Alberta Canada
Adair International Oil & Gas, Inc. Houston Texas USA
Adams Resources & Energy, Inc. Houston Texas USA
Addison Energy Inc. / EXCO Resources Inc. Calgary Alberta Canada
Advantage Energy Income Fund
Calgary Alberta Canada
Aera Energy LLC / Shell Oil Company
                           + Exxon Mobil Corporation (ExxonMobil)
Bakersfield California USA
Agęncia Nacional do Petróleo
Brazil
AGIP Petroleum Company / Eni SpA Houston Texas USA
Alamco, Inc. Clarksburg West Virginia USA
Alberta Energy Company Ltd. (AEC) / EnCana Corporation Calgary Alberta Canada
Alcorn Exploration, Inc. Houston Texas USA
Alexander Energy Corp. Oklahoma City Oklahoma USA
Algonquin Oil & Gas Ltd. Chatham Ontario Canada
Alkane Energy PLC Edwinstowe
England UK
Allied Resources, Inc. Salt Lake City Utah USA
Alma Oil & Gas Ltd. Calgary Alberta Canada
AltaCanada Energy Corp.
Calgary Alberta Canada
Alta Energy Corp. / Devon Energy Corporation Midland Texas USA
Altex Industries, Inc. Breckenridge Colorado USA
Altex Resources Ltd. / Atcor Resources Ltd. / Forest Oil Corporation / The Anschutz Corporation Calgary Alberta Canada
Altura Energy Ltd. / Occidental Petroleum Corporation (OXY)
Houston Texas USA
Amadeus Energy Ltd
formerly Amadeus Petroleum NL
Perth Western Australia Australia
Amalgamated Explorations, Inc. Denver Colorado USA
Ambra Resources Group Inc. (Defunct) / Apex Resources Group, Inc. Vancouver British Columbia Canada
Amerac Energy Corporation / Southern Mineral Corp. (SMC) / PetroCorp, Inc. / Unit Corporation
Texas USA
Amerada Hess Corporation New York New York USA
Amerada Hess Limited / Amerada Hess Corporation England UK
American Bailey Inc. Stamford Connecticut USA

American Energy Group Ltd.

Houston Texas USA
American Exploration Company / Louis Dreyfus Natural Gas Corp. / Dominion Exploration & Production, Inc. / Dominion Resources, Inc. (DRI) Houston Texas USA
American International Petroleum Corporation (AIPC) Houston Texas USA
American Leduc Petroleums Limited Calgary Alberta Canada
American Natural Energy Corporation (ANEC) Tulsa Oklahoma USA
American Oil & Gas, Inc. (AOGI) Denver Colorado USA
American Resources Offshore, Inc. Houston Texas USA
American Rivers Oil Company Colorado USA
American Shoreline, Inc. (AmShore) Corpus Christi Texas USA
American Warrior, Inc. USA
AMG Oil Ltd.
Aminex plc London England UK
Amity Oil Limited West Perth Western Australia Australia
Amnis Energy Inc.
Dallas Texas USA
AMVEST Minerals Company, L.L.C. / AMVEST Corporation Charlottesville Virginia USA
AMVEST Nova Scotia Ltd. / AMVEST Oil & Gas, Inc. / AMVEST Minerals Company, L.L.C. / AMVEST Corporation Nova Scotia Canada
AMVEST Oil & Gas, Inc. / AMVEST Minerals Company, L.L.C. / AMVEST Corporation Charlottesville Virginia USA
Anadarko Algeria Company, LLC / Anadarko Petroleum Corporation London England UK
Anadarko Canada Corporation / Anadarko Petroleum Corporation Calgary Alberta Canada
Anadarko E & P Company, LP / Anadarko Petroleum Corporation The Woodlands Texas USA
Anadarko Petroleum Corporation The Woodlands Texas USA
ANCAP (Uruguay) Montevideo Uruguay

Anderson Exploration Ltd. / Devon Energy Corporation

Calgary Alberta Canada
Anglo-Dutch Petroleum International Inc. Houston Texas USA
Anglo Siberian Oil Company plc England UK
Anhydride Petroleum Inc.
Vancouver British Columbia Canada
Anschutz Exploration Corporation / The Anschutz Corporation
Denver Colorado USA

Antelope Energy Company, LLC

Kimball Nebraska USA
Antrim Energy Inc. Calgary Alberta Canada
Anzoil NL / Nuenco NL Subiaco Western Australia Australia
Apache Argentina Corp. / Apache Corporation Buenos Aires
Argentina
Apache Canada Ltd. / Apache Corporation Calgary Alberta Canada
Apache China Corp. / Apache Corporation Beijing China
Apache Corporation Houston Texas USA
Apache Egypt Companies / Apache Corporation Cairo Egypt
Apache Energy Ltd. / Apache Corporation
West Perth Western Australia Australia
Apache North Sea Limited / Apache Corporation Aberdeen Scotland UK
Apco Argentina Inc.
Tulsa Oklahoma USA
Apex Resources Group, Inc. Salt Lake City Utah USA
APF Energy Trust Calgary Alberta Canada
Aquest Explorations Ltd.
Aquilo Energy Inc. / Baytex Energy Trust Calgary Alberta Canada
Arakis Energy Corporation / Talisman Energy Inc. Calgary Alberta Canada
Arbour Energy Inc.
Calgary Alberta Canada
ARC Energy Limited
West Perth Western Australia Australia
ARC Energy Trust Calgary Alberta Canada
Arch Petroleum, Inc. / Pogo Producing Company Fort Worth Texas USA
Arctos Petroleum Corp.
formerly Camflo International
formerly Spearhead Resources
Vancouver British Columbia Canada
Arena Resources, Inc. Tulsa Oklahoma USA
Argo Energy Ltd. / Sequoia Oil and Gas Trust
Calgary Alberta Canada
Arlington Oil & Gas Ltd.
Vancouver British Columbia Canada
Armstrong Energy Corporation Roswell New Mexico USA
Arrow Energy NL Australia
Arsenal Energy Inc.
Aruba Petroleum Incorporated Plano Texas USA
Ascent Energy Ltd.
Ascot Energy Resources Ltd. Canada
Aspect Energy, LLC Denver Colorado USA
Aspen Exploration Corporation Denver Colorado USA
Aspen Group Resources Corporation Oklahoma City Oklahoma USA
Aspen Integrated Oil & Gas, LLC
Aspen Operating Company, LLC
Fort Worth Texas USA
Assure Energy, Inc.
Calgary Alberta Canada
Assure Oil & Gas Corp. / Assure Energy, Inc.
ASTRA Compañia Argentina de Petróleo S.A. Argentina
Atlantic Caspian Resources plc UK
Atlas Energy Ltd. Calgary Alberta Canada
ATP Oil & Gas Corporation Houston Texas USA
Aurado Energy, Inc.
formerly Aurado Exploration Ltd.
Agno-Lugano Switzerland
Aurado Energy, Inc.
formerly Aurado Exploration Ltd.
Toronto  Ontario Canada
Aurora Energy, Ltd. / Cadence Resources Corporation
Traverse City Michigan USA
Aurora Gas, LLC  / Aurora Power Resources, Inc. Houston Texas USA

Austral Pacific Energy Ltd.

formerly Indo-Pacific Energy Ltd.

Karori Wellington New Zealand
Australian Worldwide Exploration Limited Australia
Avatar Industries Limited Australia
Aventura Energy Inc.
Avenue Energy, Inc. / Avenue Group, Inc. Sherman Oaks California USA
Avenue Group, Inc.

Avery Resources Inc.

formerly Canop Worldwide Corp

Calgary Alberta Canada
Avid Oil & Gas Ltd. / Husky Energy Inc. Calgary Alberta Canada
Aviva Petroleum Inc. Dallas Texas USA
Ayrex Resources Ltd.
Calgary Alberta Canada
Bard Ventures Ltd. Vancouver British Columbia Canada
Barnwell of Canada, Limited / Barnwell Industries, Inc Calgary Alberta Canada
Barnwell Industries, Inc Honolulu Hawaii USA
Baron Energy, Inc.
San Marcos Texas USA
Barrett Resources Corporation / The Williams Companies, Inc. (TWC) Denver Colorado USA
Barrington Petroleum Ltd. Calgary Alberta Canada
Basa Resources, Inc. Dallas Texas USA
Basic Earth Science Systems, Inc. Denver Colorado USA
Basin Exploration, Inc. / Stone Energy Corporation Denver Colorado USA
Bass Enterprises Production Company / Bass Corp. Fort Worth Texas USA
Bayhurst Gas Limited / SaskEnergy Incorporated (SaskEnergy) Canada
Baytech, Inc. Midland Texas USA
Baytex Energy Trust Calgary Alberta Canada
Beach Petroleum NL
Bear Paw Energy
Bearcat Explorations Limited Calgary Alberta Canada
Bear Creek Energy Ltd.
Calgary Alberta Canada
BelAir Energy Corporation / Purcell Energy Ltd. Calgary Alberta Canada
Belden & Blake Corporation North Canton Ohio USA
Bellwether Exploration Company / Mission Resources Corporation Houston Texas USA
Benson Petroleum Ltd.
Benton Oil and Gas Company
Benz Energy Ltd
Berexco, Inc. Wichita Kansas USA
Berkley Petroleum Corp/ Anadarko Petroleum
Berry Petroleum Company Bakersfield California USA
Best Pacific Resources Ltd.
BETA Oil & Gas, Inc. / Petrohawk Energy Corporation Tulsa Oklahoma USA
BG Group plc Reading England UK
BHP Billiton Limited Melbourne Victoria Australia
BHP Billiton Plc London England UK
BHP Billiton Petroleum (Americas) Inc. / BHP Billiton Petroleum Inc. / BHP Billiton Plc Houston Texas USA
BHP Billiton Petroleum Inc. / BHP Billiton Plc
BHP Billiton Petroleum Ltd
London England UK
BHP Billiton Petroleum Pty Ltd
Perth Western Australia Australia
BHP Hawaii
BHP Petroleum Company
Bill Barrett Corporation Denver Colorado USA
Bison Resources Ltd.
Black Hills Exploration and Production / Black Hills Corporation (BHC) Golden Colorado USA
Black Rock Oil & Gas Plc West Perth Western Australia Australia
BlackRock Ventures Inc.
Calgary Alberta Canada
Black Star Oil Company Plano Texas USA
Blaze Energy Ltd.
Bligh Oil and Minerals N.L Brisbane Queensland Australia
Blue Dolphin Energy Company Houston Texas USA
Big Lake Corporation Dallas Texas USA
Blue Mountain Energy Ltd.
Blue Ridge Energy Inc. Houston Texas USA
Bois d'Arc Energy LLC / Comstock Resources, Inc. Houston Texas USA
Bonavista Energy Trust Ltd.
formerly Bonavista Petroleum Ltd.
Calgary Alberta Canada
Bonneville Fuels Corporation Denver Colorado USA
Bonterra Energy Income Trust

Boral Energy

now Origin Energy

Sydney New South Wales Australia
Bounty Oil & Gas NL
Bow Valley Energy Ltd.
Calgary Alberta Canada
BP America, Inc. / BP Energy Company / BP plc Warrenville Illinois USA
BP America Production Company / BP Energy Company / BP plc USA
BP Amoco PLC / BP Energy Company / BP plc
Houston Texas USA
BP Canada Energy Company / BP Energy Company / BP plc Houston Texas USA
BP plc London England UK
Bravo Natural Resources, Inc. / Patina Oil & Gas Corporation Tulsa Oklahoma USA
BreitBurn Energy LP
Houston Texas USA

BreitBurn Energy (U.S.A.) / Provident Energy Trust

formerly BreitBurn Energy Company, LLC

Los Angeles California USA
Brek Energy Corporation London England UK
Brenham Oil & Gas Inc. / American International Industries Inc. Kemah Texas USA
Bretagne, G.P.
Nashville Tennessee USA
BRG Petroleum Corporation
formerly BRG Petroleum, Inc.
Tulsa Oklahoma USA
Bridgetown Energy Corporation / Olympia Energy Inc. / Provident Energy Trust Calgary Alberta Canada
Brigham Exploration Company Austin Texas USA
Bristol Resources Corp. Tulsa Oklahoma USA
Britannia Operators
Brooklyn Energy Corporation
Calgary Alberta Canada
Brooklyn Union Group
BTA Oil Producers
Bulldog Energy Inc
Broken Hill Proprietary Company Limited (BHP) / BHP Billiton
Melbourne Victoria Australia
Burlington Resources Canada Ltd. / Burlington Resources Inc. Calgary Alberta Canada
Burlington Resources, Inc. Houston Texas USA
Burlington Resources Oil and Gas Company LP / Burlington Resources, Inc.
Houston Texas USA
Burlington Resources (UK) Holdings Ltd. / Burlington Resources International Division / Burlington Resources, Inc. London England UK
Burmis Energy Inc.
Calgary Alberta Canada
Burnett Oil Company Fort Worth Texas USA
Burren Energy plc London England UK
Bushmills Energy Corporation
BWAB Incorporated
BXL Energy Ltd. / Viking Energy Royalty Trust Calgary Alberta Canada
Cabot Oil & Gas Corporation Houston Texas USA
Cadence Resources Corporation Walla Walla Washington USA
Cairn Energy plc Edinburgh Scotland UK
Calcasieu Real Estate and Oil Company, Inc. Lake Charles Louisiana USA
Callon Petroleum Company Natchez Mississippi USA
Caltex Australia Petroleum Pty Ltd
Calvalley Petroleum Inc.
Calver Resources Inc.
CAMAC Holdings, Inc. Houston Texas USA
Camberly Energy Ltd.
Calgary Alberta Canada
Cambridge Energy Corporation
Canada Southern Petroleum Ltd. Calgary Alberta Canada
Canadex Resources Limited Brampton Ontario Canada

Canadian 88 Energy Corporation

now Esprit Exploration Ltd.

Calgary Alberta Canada
Canadian Blackhawk Energy Inc. / New North Resources Ltd. Calgary Alberta Canada
Canadian Forest Oil Ltd. / Forest Oil Corporation Calgary Alberta Canada
Canadian Hunter Exploration Ltd. / Burlington Resources Canada Ltd. / Burlington Resources Inc.
Calgary Alberta Canada
Canadian Imperial Venture Corp.
Canadian Natural Resources Limited (CNRL) Calgary Alberta Canada
Canadian Occidental Petroleum Ltd. (CanOxy) / Nexen Canada Ltd. / Nexen Inc. Calgary Alberta Canada
Canadian Oil Sands Investments Inc.
Canadian Oil Sands Trust Calgary Alberta Canada
Canadian Superior Energy Inc. Calgary Alberta Canada
CanArgo Energy Corporation St. Peter Port Guernsey Channel Islands
CanBaikal Resources Inc. Calgary Alberta Canada
Canetic Resources Trust Calgary Alberta Canada
Canex Energy Inc. Calgary Alberta Canada

Canop Worldwide Corp.

now Avery Resources Inc.

Calgary Alberta Canada
Canoro Resources Ltd. Calgary Alberta Canada
Canrise Resources Calgary Alberta Canada
CanScot Energy Corp.
Calgary Alberta Canada
CanScot Resources Ltd. / APF Energy Trust
Calgary Alberta Canada
Capco Energy, Inc. Stafford Texas USA
CAPCO Resources Ltd. Calgary Alberta Canada
Captiva Resources Inc.
Denver Colorado USA

Carbon Energy Canada Corporation / Carbon Energy Corporation

formerly CEC Resources, Ltd.

Calgary Alberta Canada
Carbon Energy Corporation / Evergreen Resources, Inc. / Pioneer Natural Resources Company Denver Colorado USA
Carirn Energy PLC
Carnarvon Petroleum Ltd. Melbourne Victoria Australia
Carpathian Resources Limited
Carrizo Oil & Gas, Inc. Houston Texas USA
Case Resources Inc.
Castle Energy Corporation
Castleguard Energy Inc.
Causeway Energy Corporation / PanCanadian Petroleum Limited / EnCana Corporation
Calgary Alberta Canada
Cavell Energy Corporation Calgary Alberta Canada

CEC Resources, Ltd.

now Carbon Energy Canada Corporation / Carbon Energy Corporation

Celero Energy, LP Midland Texas USA
Celtic Exploration Ltd.
Calgary Alberta Canada
Centrica plc Windsor England UK
Centurion Energy International Inc.
Calgary Alberta Canada
CEP International Petroleum Ltd. Calgary Alberta Canada
Cequel Energy Inc

CGX Energy Inc.

formerly CGX Resources Inc.

Toronto  Ontario Canada
Chancellor Group Inc.
Chaparral Resources, Inc. White Plains New York USA
Chauvco Resources Ltd. / Pioneer Natural Resources Company Calgary Alberta Canada
Cheniere Energy, Inc. Houston Texas USA
Chesapeake Energy Corporation Oklahoma City Oklahoma USA
Chesapeake Operating, Inc. / Chesapeake Energy Corporation Oklahoma City Oklahoma USA
Chevron Canada Resources Ltd. Calgary Alberta Canada
ChevronTexaco Corporation San Ramon California USA
Chevron U.K. Ltd / ChevronTexaco Corporation Aberdeen Scotland UK
Chevron USA Production Company / Chevron USA, Inc. / ChevronTexaco Corporation Houston Texas USA
Cheyenne Energy Inc.
Calgary Alberta Canada
Cheyenne Petroleum Company Oklahoma City Oklahoma USA
Chieftain International Ltd. / Hunt Oil Company Edmonton Alberta Canada

China National Offshore Oil Corporation (CNOOC)

now CNOOC Limited

Beijing China
China National Petroleum Corporation (CNPC) Beijing China
Chinese Petroleum Corporation (CPC) Taipei Taiwan

Chinook Energy Services Inc.

now Deep Resources Ltd.

Calgary Alberta Canada
Choice Resources Corp. Calgary Alberta Canada
Chrome Energy Corporation
Chugach Alaska Corporation (CAC) Anchorage Alaska USA
Cimarex Energy Company Denver Colorado USA
Cinco Land & Exploration, Inc. Houston Texas USA

Circumpacific Energy Corporation

Calgary Alberta Canada
Citation Oil & Gas Corp. Houston Texas USA
CityView Corporation Limited
Perth Western Australia Australia
Clayton Williams Energy, Inc. Midland Texas USA
Clear Energy Inc. Calgary Alberta Canada
Clements Exploration Company Oklahoma City Oklahoma USA
Cloudbreak Resources Ltd.
formerly Condor Gold Fields Inc.
Vancouver British Columbia Canada
CLX Energy, Inc. Denver Colorado USA
Clyde Petroleum Plc / Gulf Canada Resources Ltd. / Olympic & York Development Ltd / ConocoPhillips Company London England UK
CMS CMS Oil and Gas Company / Perenco Houston Texas USA
CNOOC Limited
formerly China National Offshore Oil Corporation (CNOOC)
Beijing China
Coastal Oil & Gas Corp. / El Paso Production Company / El Paso Corporation (formerly El Paso Energy Corporation) Houston Texas USA
Cobra Venture Corporation West Vancouver British Columbia Canada
Cody Energy, Inc. / Cabot Oil & Gas Corporation
Denver Colorado USA
Colt Energy Inc. / KeyWest Energy Corporation / Viking Energy Royalty Trust Calgary Alberta Canada

Columbia Natural Resources LLC / Triana Energy Holdings LLC

formerly Columbia Natural Resources, Inc. / NiSource Inc.

Charleston West Virginia USA
Columbian Petroleum Company (ECOPETROL)
Bogota Colombia
Compton Petroleum Corporation
Calgary Alberta Canada
Comstock Oil & Gas, Inc. USA
Comstock Resources, Inc. Frisco Texas USA

Concho Oil & Gas Corporation / Chesapeake Energy Corporation (CHK)

formerly Concho Resources, Inc.

Midland Texas USA
Connacher Oil and Gas Limited Calgary Alberta Canada
Conoco, Inc. / ConocoPhillips Company Houston Texas USA
ConocoPhillips Company Houston Texas USA
ConocoPhillips Alaska, Inc. / ConocoPhillips Company Anchorage Alaska USA
Consolidated Beacon Resources Ltd. Calgary Alberta Canada
Consolidated Gulfside Resources Ltd. Vancouver British Columbia Canada
Consolidated Natural Gas Company
Contact Exploration Inc.
Calgary Alberta Canada
Contango Oil & Gas Company Houston Texas USA
Continental Energy Corporation Langley British Columbia Canada
Continental Resources of Illinois, Inc. Mount Vernon Illinois USA
Continental Resources, Inc. Enid Oklahoma USA
Contour Energy Company / Samson Investment Company Houston Texas USA
Coplex Resources NL Australia
Corridor Resources Inc. Halifax Nova Scotia Canada
Cortez Oil & Gas, Inc.
Plano Texas USA
Costilla Energy, Inc. / Louis Dreyfus Natural Gas Corp. / Dominion Exploration & Production, Inc. / Dominion Resources, Inc. (DRI) Midland Texas USA
Courage Energy Inc. Canada
Crab Run Gas Company / WGL Holdings, Inc. USA
Crawley Petroleum Corporation Oklahoma City Oklahoma USA
CREDO Petroleum Corporation Denver Colorado USA
Crescent Point Energy Trust
Calgary Alberta Canada

Crest Petroleum Berhad

now SapuraCrest Petroleum Bhd

Malaysia
Crestar Energy Inc. Calgary Alberta Canada
Crispin Energy Inc. Calgary Alberta Canada

Cross Timbers Oil Company

now XTO Energy, Inc.

Fort Worth Texas USA
Crown Petroleum, LLC Austin Colorado USA
Cubacan Exploration Inc.
CUMI S.A. / Balmig S.A Santa Cruz Argentina
CUMI Petroleum International / CUMI S.A. / Balmig S.A Quito Ecuador
Curlew Lake Resources Inc.
Langley British Columbia Canada
CVL Resources Ltd.
D&L Energy, Inc. Youngstown Ohio USA
Dallas Production, Inc. Dallas Texas USA
Dana Petroleum plc Aberdeen Scotland UK
Daniel Explorations, Inc. Georgetown Texas USA
Danoil Energy Ltd. Calgary Alberta Canada
Dansk Olie OG Natural Gas (DONG) Hørsholm Denmark
Dart Cherokee Basin Operating Company, LLC / Dart Energy Corporation Independence Kansas USA
Dart Oil & Gas Corporation / Dart Energy Corporation
Mason Michigan USA
Daugherty Resources, Inc.
Lexington Kentucky USA
Davis Petroleum Corp.
formerly Davis Oil Company
Houston Texas USA
Daytona Energy Corporation

Deep Resources Ltd.

formerly Chinook Energy Services Inc.

Calgary Alberta Canada
Deer Creek Energy Limited Calgary Alberta Canada
Defiant Energy Corporation
Calgary Alberta Canada

Del Roca Energy Ltd. / Tusk Energy Inc.
formerly Del Roca Energy Inc.

Calgary Alberta Canada
Delta Petroleum Corporation Denver Colorado USA
Denbury Resources, Inc. Plano Texas USA
Derek Oil & Gas Corporation
formerly Derek Resources Corporation
Vancouver British Columbia Canada

Derek Resources Corporation

now Derek Oil & Gas Corporation

Vancouver British Columbia Canada
Desire Petroleum plc Malvern England UK
Detector Exploration Ltd.
Devlan Exploration Inc. Calgary Alberta Canada
Devon Canada Corporation / Devon Energy Corporation
Calgary Alberta Canada
Devon Energy Corporation Oklahoma City Oklahoma USA
Devon Energy Production Company, LP / Devon Energy Corporation USA
Devonian Appalachian, Inc. Kingsville Ohio USA
DevX Energy, Inc. / Comstock Resources, Inc. Dallas Texas USA
Diaz Resources Ltd. Calgary Alberta Canada
Ditem Explorations Inc.
Dominion Exploration Canada Ltd. / Dominion Exploration & Production, Inc. / Dominion Resources, Inc. (DRI)
Calgary Alberta Canada

Dominion Exploration and Production, Inc. / Dominion Resources, Inc. (DRI)

Houston Texas USA
Dominion Exploration & Production, Inc. / Dominion Exploration and Production, Inc. / Dominion Resources, Inc. (DRI) USA
Dominion Oklahoma Texas Exploration & Production, Inc. / Dominion Exploration & Production, Inc. / Dominion Resources, Inc. (DRI) Oklahoma City Oklahoma USA
Dominion Resources, Inc. (DRI) Richmond Virginia USA
Dorchester Minerals, LP
formerly Dorchester Hugoton
formerly Republic Royalty
formerly Spinnaker Royalty
Dallas Texas USA
Doreal Energy Corporation Vancouver British Columbia Canada
Double Eagle Petroleum Company
formerly Double Eagle Petroleum and Mining Company
Casper Wyoming USA
Dover Petroleum Corp.
Doyon, Limited Fairbanks Alaska USA
Dragon Oil PLC Dublin Ireland UK
Drake Pacific Enterprises Ltd.
Drilcorp Energy Ltd.
Calgary Alberta Canada
Drucker Inc.
Duke Energy Corporation Charlotte North Carolina USA
Dundee Petroleum Corp. Canada
Dunhill Resources, Inc. Houston Texas USA
Durness Resources Inc.
Dynamic Oil & Gas, Inc. Richmond British Columbia Canada
Dynamic Ventures
Dynegy, Inc. Houston Texas USA
E3 Energy Inc. Calgary Alberta Canada
E&B Natural Resources
Bakersfield California USA
Eastern American Energy Corporation / Energy Corporation of America (ECA)
Charleston West Virginia USA
Eastway Petroleum Ltd.
Eaton Industries of Houston, Inc.
Houston Texas USA
Ecopetrol S.A.
Bogota Colombia
Edge Petroleum Corporation Houston Texas USA
Edinburgh Oil & Gas plc Edinburgh Scotland UK
EEX Corporation / Newfield Exploration Company Houston Texas USA
El Paso Corporation
formerly El Paso Energy Corporation
Houston Texas USA
El Paso Production Company / El Paso Corporation Houston Texas USA
Elf Aquitaine Group / Total Fina Elf SA Paris France
Elf Exploration, Inc. (EEI) / Total Fina Elf SA
Houston Texas USA
Elf Petroleos do Brasil
Emera Energy / Emera, Inc. Halifax Nova Scotia Canada
Emerald Energy plc London England UK
Emirates National Oil Company Limited (ENOC) Dubai UAE
Empire Energy Corporation International (EECI) / Great South Land Minerals Limited (GSLM) Overland Park Kansas USA
Empiric Energy Inc.
Addison Texas USA
Empresa Colombiana de Petroleos (Ecopetrol) Bogotá Colombia
Empresa Nacional del Petróleo (ENAP)
Santiago Chile
Encal Energy Ltd. / Calpine Canada Natural Gas Company / Calpine Corporation Calgary Alberta Canada
EnCana Corporation Calgary Alberta Canada
EnCana Energy Resources Inc. / EnCana Corporation
Denver Colorado USA
EnCana Oil & Gas (USA) Inc. / EnCana Corporation Denver Colorado USA
Encore Acquisition Company Fort Worth Texas USA
Encounter Energy Inc. / Impact Energy Inc. / Thunder Energy Inc. Calgary Alberta Canada
Endev Energy Inc. / Moxie Exploration Ltd. Calgary Alberta Canada
Endless Energy Corp
Energas Resources Inc. Oklahoma City Oklahoma USA
Energen Resources Corporation / Energen Corporation
Birmingham Alabama USA
Energem Resources Inc.
formerly DiamondWorks
Bedfordview Gauteng South Africa
Energen Corporation Birmingham Alabama USA
Energy Africa Limited Cape Town South Africa
Energy Corporation of America (ECA) Denver Colorado USA
Energy Equity Corporation Ltd.
Energy Exploration Technologies Inc. (NXT) Calgary Alberta Canada
Energy North Inc. / Argo Energy Ltd.
Calgary Alberta Canada
Energy Partners, Ltd. New Orleans Louisiana USA
Energy Production Corporation (EPCo) Dallas Texas USA
Energy Search Incorporated Knoxville Tennessee USA
Enerplus Resources Fund
Calgary Alberta Canada
EnerVest Management Partners, Ltd. Houston Texas USA
Eni S.p.A. Rome Italy

Enron Oil & Gas Company (EOG)
formerly Enron Exploration Company

now EOG Resources, Inc.

Houston Texas USA
Ensign Oil & Gas, Incorporated / Medicine Bow Energy Corporation
Ensign Oil & Gas Resources
Ensign Operating Company / Medicine Bow Operating Company / Medicine Bow Energy Corporation
Denver Colorado USA
Enterprise Oil Plc / Shell Resources plc / Royal Dutch/Shell Group of Companies
London England UK
Enterra Energy Trust
Enterra Energy Corp.
formerly Westlinks Resources Ltd.
Calgary Alberta Canada
Environmental Remediation Holding Corporation Houston Texas USA
Envision Natural Resources Group, Inc.

EOG Resources, Inc.

formerly Enron Oil & Gas Company (EOG)
formerly Enron Exploration Company

Houston Texas USA
EOG Resources Canada Inc. / EOG Resources, Inc. Calgary Alberta Canada
Epic Energy Inc.
Calgary Alberta Canada
Epic Oil and Gas Ltd.
Equatorial Energy Inc.
Equitable Resources, Inc. (ERI) Pittsburgh Pennsylvania USA
Equity Oil Company Salt Lake City Utah USA
Equus Energy Corporation Vancouver British Columbia Canada
Erdöl/Erdgas Gommern
Esenjay Exploration, Inc. / Santos Ltd. Corpus Christi Texas USA

Esker Resources Ltd.

now Rider Resources Ltd.

Calgary Alberta Canada

Esprit Energy Trust
formerly Esprit Exploration Ltd.

formerly Canadian 88 Energy Corporation

Calgary Alberta Canada
Essex Resources Corporation
Vancouver British Columbia Canada
Esso Imperial Oil / Imperial Oil Ltd. Calgary Alberta Canada
Establissements Maurel & Prom Paris France
Etruscan Enterprises Ltd.
Eurogas Corporation Calgary Alberta Canada
Eurogas, Inc. West Vancouver British Columbia Canada
Eurogas International Inc. / Eurogas Corporation
Tunis Tunisia

Euromax Resources Ltd.

formerly Omax Resources Ltd.

Vancouver British Columbia Canada
Everest Energy Corporation Calgary Alberta Canada
Evergreen Operating Corporation (EOC) / Evergreen Resources, Inc. / Pioneer Natural Resources Company Denver Colorado USA
Evergreen Resources, Inc. / Pioneer Natural Resources Company Denver Colorado USA
Exall Resources Limited Toronto  Ontario Canada
Exchequer Resource Corp. Vancouver British Columbia Canada
EXCO Resources Inc. Dallas Texas USA
EXP Resources Ltd.
ExplorTech LLC Denver Colorado USA
Extreme Energy Corporation
Calgary Alberta Canada
Exxel Energy Corp. Vancouver British Columbia Canada
Exxon Mobil Corporation (ExxonMobil) Irving Texas USA
ExxonMobil Canada Ltd. / Exxon Mobil Corporation (ExxonMobil)
Calgary Alberta Canada
ExxonMobil Canada Properties Ltd. / Exxon Mobil Corporation (ExxonMobil) Calgary Alberta Canada
ExxonMobil Oil Corp. / Exxon Mobil Corporation (ExxonMobil) USA
Fairborne Energy Ltd. merger with Pivotal Energy Ltd. Calgary Alberta Canada
Falcon Oil & Gas Ltd. Vancouver British Columbia Canada
Far East Energy Corporation (FEEC) Houston Texas USA
Faroe Petroleum PLC Aberdeen Scotland UK
Fidelity Exploration & Production Company / MDU Resources Group, Inc. Denver Colorado USA
FieldPoint Petroleum Corporation Cedar Park Texas USA
Find Energy Ltd. Calgary Alberta Canada
First Calgary Petroleums Ltd. Calgary Alberta Canada
First Goldwater Resources Inc.
First Permian, LLC Midland Texas USA

First Star Energy Ltd.

now Rosetta Exploration Inc.

Calgary Alberta Canada
Five States Energy Company, LLC
Dallas Texas USA
Fletcher Challenge Energy / Fletcher Challenge Limited Penrose Auckland New Zealand
Flowing Energy Corporation
Calgary Alberta Canada

Foothills Oil and Gas Ltd.

now Midnight Oil and Gas Ltd.

Calgary Alberta Canada
Foreland Corporation Amarillo Texas USA
Forest Oil Corporation Denver Colorado USA
Forest Exploration International (SA) (Pty) Ltd. / Forest Oil Corporation Cape Town
South Africa
Forte Resources Inc.
formerly Denison Oil Corporation
Calgary Alberta Canada

Fortum Oil & Gas / Eni SpA

formerly Fortum Oil & Gas / Fortum Corporation

Fortune Natural Resources Corporation
Forum Energy Corporation Calgary Alberta Canada
Forum Exploration, Inc. / Forum Energy Corporation Philippines
Fossil Bay Resources Ltd. Dallas Texas USA
Founders Energy Ltd. / Provident Energy Trust Calgary Alberta Canada
Fox Energy Corporation Calgary Alberta Canada
Franco Nevada
Freedom Oil and Gas Inc.
Frontier Natural Gas Corporation / Santos USA Corp (SUSAC) / Santos Americas & Europe Corporation / Santos Ltd.
Houston Texas USA
Fugro
Fusion Oil & Gas NL / Fusion Oil & Gas plc / Sterling Energy plc West Perth Western Australia Australia
Fusion Oil & Gas plc / Sterling Energy plc Twickenham England UK
fwdSTEP resources limited
FX Energy, Inc. Salt Lake City Utah USA
GAIN Energy Inc. (GEI) Anchorage Alaska USA
Gaither Petroleum Corporation (GPC) Houston Texas USA
Galleon Energy Inc. Calgary Alberta Canada
Gas De Portugal (GDP) Lisboa Portugal
Gasco Energy, Inc. Englewood Colorado USA
Gasconade Oil Company Denver Colorado USA
Gastar Exploration, Ltd. Mt. Pleasant Michigan USA
Gauntlet Energy Corporation
Gaz de France (GdF) Paris France
Gazprom
GBK Corporation Tulsa Oklahoma USA
Gearhart Australia
Gemini Energy Corp. Vancouver British Columbia Canada
Genesis Eurasia Corporation (GEC) Houston Texas USA
Gentry Resources Ltd.
Calgary Alberta Canada
Geocan Energy Inc.
Geoearth Resources S.A. Quito   Ecuador

GeoGlobal Resources Inc.

formerly Suite101.com, Inc.

Calgary Alberta Canada
GeoResources, Inc. Williston North Dakota USA
GEOREX S.A. Argenteuil France
Gibraltar Energy Company El Dorado Arkansas USA
Gibson Petroleum Company Limited
Givot Olam Oil Ltd. Jerusalem Israel
Glacier Ridge Resources Ltd.
Global Energy Development PLC / Harken Energy Corporation Cirencester England UK
Global Marine Inc. / GlobalSantaFe Corporation
Houston Texas USA
GlobalSantaFe Corporation
Houston Texas USA
GLOBEX Energy, Inc. / Marathon Oil Company / Marathon Oil Corporation Houston Texas USA

Globex Resources Ltd.

formerly Globex Resources Energy Company

Calgary Alberta Canada
GMX Resources Inc. Oklahoma City Oklahoma USA
Golden Gate Petroleum Ltd.
formerly Golden Gate Resources Ltd.
West Perth Western Australia Australia
Goodrich Petroleum Corporation Houston Texas USA
Gorgon Australain LNG
Grand Banks Energy Corporation
Great Northern Exploration Ltd.
Great South Land Minerals Limited (GSLM) Hobart Tasmania Australia
Great Western Drilling Company
Greentree Gas & Oil Ltd.
Greka Energy Corporation New York New York USA
Gresham Resources Inc.
Grey Wolf Exploration Inc./ Abraxas Petroleum Corporation Calgary Alberta Canada
Greymouth Petroleum
Grid Resources Ltd.
Gryphon Exploration Company Houston Texas USA
GSV, Inc. (Grove Strategic Ventures) Westport Connecticut USA
Gulf Canada Resources Ltd. / Olympic & York Development Ltd. / ConocoPhillips Company Calgary Alberta Canada
Gulf Indonesia Resources Limited
Gulf Stream Resources Ltd. / Anadarko Petroleum Corporation
Calgary Alberta Canada
Gulfport Energy, Inc. Oklahoma City Oklahoma USA
Gulfstream Resources Canada Limited / Anadarko Petroleum Corporation Calgary Alberta Canada
GulfWest Energy Inc. merged with Starlight Corp. Houston Texas USA
Habanero Resources Inc. Vancouver British Columbia Canada
Hallador Petroleum Company
Denver Colorado USA
Hallwood Petroleum Inc. Denver Colorado USA
Halo Resources Ltd. Vancouver British Columbia Canada
Hampton Court Resources Inc. Calgary Alberta Canada
Hanwha Energy Company South Korea
Harbour Petroleum Company Calgary Alberta Canada
Hardman Resources Limited West Perth Western Australia Australia
Hardy North Sea Ltd. / Hardy Oil & Gas plc London England UK
Hardy Oil & Gas Canada Ltd. / Hardy Oil & Gas plc Calgary Alberta Canada
Hardy Oil & Gas plc London England UK
Hardy Oil & Gas (UK) Ltd. / Hardy Oil & Gas plc London England UK

Hardy Oil & Gas USA, Inc. / Hardy Oil & Gas plc

now Mariner Energy, Inc. / Mariner Energy LLC

Houston Texas USA
Hardy Petroleum Ltd. / Hardy Oil & Gas plc Perth Western Australia Australia
Harken Energy Corporation Houston Texas USA
Hartman Oil Company, Inc. Wichita Kansas USA
Harvest Natural Resources, Inc.
formerly Benton Oil and Gas Company
Houston Texas USA
Hawk Oil Inc.
Hawker Resources Inc. Calgary Alberta Canada
HBA Oil Company Littleton Colorado USA
Headington Oil Company Dallas Texas USA
Heartland Oil and Gas Corporation Vancouver British Columbia Canada
Helm Energy, LLC
Greenwood Village Colorado USA
Heritage Oil Corporation Calgary Alberta Canada
HEYCO Energy Group
Roswell New Mexico USA
Hibernia Management and Development Company

High Plains Energy Inc.

Calgary Alberta Canada

High Point Resources Inc.

formerly High Point Energy Corp.
formerly Mesquite Exploration Ltd.

Calgary Alberta Canada
Highland Energy Inc. Pointe Claire Quebec Canada
Hilcorp Energy Company Houston Texas USA

Hondo Oil & Gas Company / Devon Energy Corporation

USA
Hoodoo Hydrocarbons Ltd.
Horizon Oil
Horseshoe Operating, Inc. Midland Texas USA

Houston Energy, L.P.

Houston Texas USA
Howard Energy Corporation Mt. Carmel Illinois USA
HRF Exploration & Production Inc. Denver Colorado USA
HS Resources, Inc. / Kerr-McGee Corporation San Francisco California USA
Huber Energy LP / J.M. Huber Corporation
Houston Texas USA
Hughes South Corporation
Flowood Mississippi USA
Hunt Consolidated Inc. Dallas Texas USA
Hunt Oil Company Dallas Texas USA
Hunt Oil Company of Canada, Inc. / Hunt Oil Company Calgary Alberta Canada
Hunt Overseas Operating Company / Hunt Oil Company Dallas Texas USA
Hunt Petroleum Corporation Dallas Texas USA
Hurd Enterprises, Ltd. San Antonio Texas USA

Hurricane Hydrocarbons Ltd. (HHI)

now PetroKazakhstan Inc.

Calgary Alberta Canada
Husky Energy Inc.
formerly Husky Oil Ltd.
Calgary Alberta Canada

Husky Oil Ltd.

now Husky Energy Inc.

Calgary Alberta Canada
Icon Energy Limited
formerly Icon Oil N.L.
Queensland Australia
Impact Energy Inc. / Thunder Energy Inc. Calgary Alberta Canada
Imperial Oil Limited (Esso) Toronto  Ontario Canada
Imperial Oil Resources Canada
Imperial Petroleum, Inc.
Indian Oil Corporation

Indo-Pacific Energy Ltd.

now Austral Pacific Energy Ltd.

Karori Wellington New Zealand
Infiniti Resources International Ltd.
Inland Resources, Inc. / Newfield Exploration Company Denver Colorado USA
INNEX Energy, LLC Plano Texas USA
Innova Exploration Ltd. Calgary Alberta Canada
Integra Resources Ltd. Calgary Alberta Canada

Interaction Resources Ltd.

now Ketch Energy Ltd. / Acclaim Energy Trust

Calgary Alberta Canada
International Frontier Resources Corp. Calgary Alberta Canada
International Sovereign Energy Corp.
Interoil Corporation
Inuvialuit Petroleum Corporation / Inuvialuit Regional Corporation Calgary Alberta Canada
Invader Exploration Inc. / Troutline Investments Inc. / Innova Exploration Ltd. Calgary Alberta Canada
Irving Oil Limited
Isramco, Inc. Houston Texas USA
ITERA Group Moscow Russia
Ivanhoe Energy Inc. Vancouver British Columbia Canada
Japan Canada Oil Sands Limited (JACOS) Calgary Alberta Canada
Japan Energy Corporation Tokyo Japan
Japan National Oil Corporation (JNOC) Tokyo Japan
Japan Petroleum Exploration Company, Ltd. (Japex) Tokyo Japan
Japex (US) Corp. / Japan Petroleum Exploration Company, Ltd. (Japex) Houston Texas USA
JKX Oil and Gas plc London England UK
J.M. Huber Canada Limited / J.M. Huber Corporation
Calgary Alberta Canada
J.M. Huber Corporation Edison New Jersey USA
Jetta Production Company, Inc
Jones Management Corp.
Albany Texas USA
Jordan Energy, Inc.
Columbus Ohio USA
Jordan Exploration
J.P. Oil Company Lafayette Louisiana USA
Julander Energy Company
Denver Colorado USA
J-W Operating Company Addison Texas USA
K2 America Corp. / K2 Energy Corp. Cut Bank Montana USA
K2 Energy Corp. Calgary Alberta Canada
K.P. Kaufmann Company Inc.
Kaiser-Francis Oil Company / GBK Corporation Tulsa Oklahoma USA
Kalrez Energy Limited
Kansas Natural Gas Operating, Inc. Hays Kansas USA
KCS Energy, Inc. Houston Texas USA
Kensington Energy Ltd. Calgary Alberta Canada
Kerr-McGee Corporation Oklahoma City Oklahoma USA
Kerr-McGee North Sea (UK) Limited / Kerr-McGee Corporation Aberdeen Scotland UK
Kerr-McGee Offshore Canada Ltd. / Kerr-McGee Corporation Halifax Nova Scotia Canada
Kerr-McGee Rocky Mountain Corporation / Kerr-McGee Corporation Denver Colorado USA
Kestrel Energy, Inc. Lakewood Colorado USA

Ketch Energy Ltd. / Acclaim Energy Trust

formerly Interaction Resources Ltd.

Calgary Alberta Canada
Ketch Resources Ltd. Calgary Alberta Canada
Keystone Exploration, Ltd.
Fort Worth Texas USA
KeyWest Energy Corporation / Viking Energy Royalty Trust Calgary Alberta Canada
KEX Energy, LLC / Keystone Exploration, Ltd.
Fort Worth Texas USA
Khanty Mansiysk Oil Corporation
Kick Energy Corporation
Calgary Alberta Canada

Kicking Horse Resources Ltd.

now Launch Resources Inc.

Calgary Alberta Canada
Kinder Morgan Energy Partners, L.P.
Kinetic Energy Inc.
King Energy Inc. Calgary Alberta Canada
King Operating Corporation Addison Texas USA
Kinloch Resources Inc.
Calgary Alberta Canada
Kismet Energy Corporation
KN Production Company / KN Energy, Inc. / Kinder Morgan, Inc. (KMI) Lakewood Colorado USA
Koch Industries, Inc.
Koch Oil Co. Ltd.
Korea Gas Corporation (KOGAS)
Korea National Oil Company
Kroes Energy Inc.
Krosno Oil & Gas Enterprise
Kuwait National Petroleum Company
Kuwait Oil Company (KSC) Ahmadi Kuwait
Kuwait Petroleum Corporation (KPC) Safat Kuwait
Kyrgoil Corporation
Lagasco Corp.
Lakes Oil, N.L.
Lario Oil & Gas Company
LASMO plc
Latigo Petroleum, Inc. Tulsa Oklahoma USA

Launch Resources Inc.

formerly Kicking Horse Resources Ltd.

Calgary Alberta Canada
Leede Operating Co
Lexam Explorations
Lexxor Energy Inc.
Liberty Oil and Gas Ltd.
Linn Energy, LLC Pittsburgh Pennsylvania USA
LongBow Energy Corp. Calgary Alberta Canada
Longview Petroleum Corporation
Louis Dreyfus Natural Gas Corp.
Louisiana Land and Exploration Company
Luke Energy Ltd. Calgary Alberta Canada
LUKOIL
Lumen Energy Corporation Tulsa Oklahoma USA
Lundin Oil AB
Lundin Petroleum AB Stockholm Sweden
M. E. Operating and Services, Inc.
Maersk
Maersk Oil A/S

Maersk Olie and Gas AS

Maersk Olie og Gas

Magellan Petroleum Australia Limited (MPAL) Brisbane Queensland Australia
Magellan Petroleum Corporation Madison Connecticut USA
Magin Energy
Magnum Hunter Resources, Inc. / Cimarex Energy Company Irving Texas USA
Magnum Petroleum, Inc. / Magnum Hunter Resources, Inc. / Cimarex Energy Company Irving Texas USA
Maguire Oil Company
Dallas Texas USA
Mallon Resources Corporation
Mancal Energy Inc. / Mancal Group Calgary Alberta Canada
Manhattan Resources Ltd.
Manti Resources, Inc.
Maralo LLC Houston Texas USA
Marathon Canada Limited / Marathon Oil Corporation Canada
Marathon Oil Company / Marathon Oil Corporation Houston Texas USA
Marathon Oil Corporation Houston Texas USA
Marathon Oil UK, Ltd. / Marathon Oil Corporation Aberdeen Scotland UK
Marico Oil & Gas Corporation
Mariner Energy, Inc. / Mariner Energy LLC Houston Texas USA
Maritech Resources, Inc / TETRA Technologies, Inc. The Woodlands Texas USA
MarkWest Hydrocarbon, Inc. Englewood Colorado USA
MarkWest Resources Canada Corp. / Advantage Energy Income Fund
Calgary Alberta Canada
Mart Resources Inc.
Masters Energy Inc.
formerly Terraquest Energy Corporation
Calgary Alberta Canada
Matador Petroleum Corporation
Matador Resources Company Dallas Texas USA
Matrix Energy Services Corporation Fort Worth Texas USA
Matrix Petroleum Inc.
Maverick Energy & Development Corporation
Maverick Energy, Inc.
Maxus Energy Corporation / Repsol-YPF
Maxy Oil and Gas Inc.
Maynard Oil Company / Plantation Petroleum Holdings, LLC Dallas Texas USA
McCoy Petroleum Corporation Wichita Kansas USA
McElvain Oil & Gas Properties, Inc. USA
McFarland Energy, Inc.
McMoRan Exploration Company New Orleans Louisiana USA
McMoRan Oil & Gas Company
McMoran Oil and Gas (MOXY)
MCN Energy Group Inc.
MDU Resources Group, Inc.

MegaEnergy, Inc.

Englewood Colorado USA
Melrose Resources plc Edinburgh Scotland UK
Meota Resources Corp.
Mera Petroleums Inc.
Mercantile International Petroleum Inc.
Meridian Energy Corporation
Meridian Resource Corporation
Merit Energy Company Dallas Texas USA
Merlin Synergy
MESA, Inc.
Mesa Resources Inc. / LongBow Energy Corp. Vancouver British Columbia Canada
Metalore Resources Limited Vittoria Ontario Canada
Mexco Energy Corporation Midland Texas USA
MGV Energy Inc. / Quicksilver Resources Inc.
Calgary Alberta Canada
Midmar Energy Ltd

Midnight Oil and Gas Ltd.

formerly Foothills Oil and Gas Ltd.

Calgary Alberta Canada
Milagro Energy Inc.
Millennium Energy Inc.
Miller Energy, Inc. Kalamazoo Michigan USA
Miller Exploration Company
Miller Petroleum Company
Miller Petroleum, Inc.
Ministry of Energy and Infrastructure
Mission Resources Corporation Houston Texas USA

Mitchell Energy & Development Corp. / Devon Energy Corporation

Houston Texas USA
MMS Petroleum PLC
Mobil Corporation / Exxon Mobil Corporation (ExxonMobil)
Mobil Exploration
Mobil Oil Australia
Mobil Oil Canada
Mobil Oil Corporation
Mohave Oil and Gas Company Houston Texas USA
Montello Resources Ltd.
Morrison Middlefield Resources Limited
Mosaic Oil
Mosaic Oil NL
Mosbacher Energy Company (MEC)
Houston Texas USA
Mount Dakota Energy Corp.
Moxie Exploration Ltd.
Mueller Exploration Inc.
Murphy Oil Corporation El Dorado Arkansas USA
Murphy Petroleum
Mustang Resources Inc.
Nadel and Gussman
NAL Oil and Gas Trust
Nation Energy, Inc.
National Energy Group, Inc. Dallas Texas USA
National Fuel Exploration Corp.
National-Oilwell
Nations Gas Production Corporation
Navasota Resources Ltd.
Navigo Energy Inc.
NCE Resources Group
Nelson Resources Limited
Neste Oil & Gas
Nevarro Energy Ltd.
New Cache Petroleums Ltd.
New Energy West Corporation
New Horizon Exploration Inc.
New North Resources Ltd. Calgary Alberta Canada
Newfield Exploration Company Houston Texas USA
Newfield Exploration Mid-Continent, Inc. / Newfield Exploration Company Tulsa Oklahoma USA
Newfield Rocky Mountains, Inc. / Newfield Exploration Company Denver Colorado USA
Newfoundland Hunt Oil Company, Inc. / Hunt Oil Company Dallas Texas USA
Newquest Energy, Inc.
Newstar Resources
Nexen Canada Ltd. / Nexen Inc. Calgary Alberta Canada
Nexen Inc. Calgary Alberta Canada
Nido Petroleum Limited
Niko Resources Ltd.
Noble Energy, Inc Houston Texas USA
Noble Royalties, Inc. Dallas Texas USA
Noranda
Nordic Oil and Gas Ltd.
NoreX Petroleum Limited
Norsk Hydro ASA Oslo Norway
Norstar Petroleum, Inc. Englewood Colorado USA
North American Resources
North Coast Energy, Inc.

Northstar Energy / Devon Energy Corporation

Northwest Natural Gas Company
Norwegian Energy (UK) Ltd.
Norwest Energy NL
Nova
Novitas Energy Ltd.
Novus Petroleum Limited
Nu-Sky Energy Inc.
Nuevo Energy Company
Numac Energy Inc.
NuWay Energy Inc.
NXT Energy Exploration Technologies
Nycan Energy Corp.
NZ Oil & Gas
OAO Tatneft Almetyevsk Tatarstan Russia
Obele Oil Corporation
Occidental Permian Ltd
Occidental Petroleum Corporation (OXY) Los Angeles California USA
Ocean Energy, Inc. / Devon Energy Corporation Houston Texas USA
Odessa Exploration Inc. Odessa Texas USA
Oil & Natural Gas Corporation Limited

Oil and Natural Gas Corporation Ltd. - INDIA

India
Oil Producers, Inc. of Kansas Wichita Kansas USA
Oil Search Limited
Oil Springs Energy Corp.
Oilexco Incorporated
OilSearch Limited
Oiltec Resources Ltd.
Oilware
Olympia Energy Inc. / Provident Energy Trust Calgary Alberta Canada

Omax Resources Ltd.

now Euromax Resources Ltd.

Vancouver British Columbia Canada
Omega Energy, LLC Sugar Land Texas USA
OMV
ONAKO
ONEOK Energy Resources Company / ONEOK, Inc.
Tulsa Oklahoma USA
Orca Petroleum Inc. Calgary Alberta Canada

Origin Energy

Sydney New South Wales Australia
Oryx Energy Company / Kerr-McGee Corporation
Dallas Texas USA
Osaka Gas Company
Osborn Heirs Company San Antonio Texas USA
Osprey Energy Ltd. Bridgewater Nova Scotia Canada
Outlook Resources Inc.
Oakville Ontario Canada
Ovation Energy LP / Comstock Resources Inc. North Richland Hills Texas USA
Oxley Petroleum Company / Chesapeake Energy Corporation Tulsa Oklahoma USA
Oxy USA, Inc. / Occidental Oil and Gas Corporation / Occidental Petroleum Corporation (OXY) Bakersfield California USA
Palace Exploration Company / Zinke & Trumbo, Inc. Tulsa Oklahoma USA
Palace Operating Company / Zinke & Trumbo, Inc. Tulsa Oklahoma USA
Palliser Energy Corp.
Panaco, Inc.
formerly Goldking Oil & Gas Corporation
Houston Texas USA
PanAfrican Energy Corporation Ltd
PanCanadian
PanCanadian Energy Corporation / EnCana Corporation Calgary Alberta Canada
PanCanadian Petroleum Limited
PanOil Resources Ltd.
Parallel Petroleum Corporation Midland Texas USA
Paramount Resources Ltd. Calgary Alberta Canada
Parks & Luttrell Resources, LLC
Patina Oil & Gas Corporation Denver Colorado USA
PECO Energy
Penn Virginia Oil & Gas Corp. / Penn Virginia Corporation Radnor Pennsylvania USA
Penn West Petroleum Ltd. Calgary Alberta Canada
Penneco Oil Company, Inc.

PennzEnergy Company / Devon Energy Corporation

Houston Texas USA
Pennzoil Company
Peoples Energy Production Company / Peoples Energy Corp. Houston Texas USA
Perenco Paris France
Perenco LLC / Perenco Houston Texas USA
Perez Companc S.A.
Permian Resources Inc.
Pertamina (Perusahaan Pertambangan Minyak Dan Gas Bumi Negara) Jakarta Indonesia
Perusahaan Pertambangan Minyak Dan Gas Bumi Negara (Pertamina) Jakarta Indonesia
Petrobank Energy and Resources Ltd. Calgary Alberta Canada
Petrobras
Petro-Canada
Petro-Canada Oil and Gas
PetroCorp, Inc. / Unit Corporation Tulsa Oklahoma USA
Petrohawk Energy Corporation Houston Texas USA

PetroKazakhstan Inc.

formerly

Hurricane Hydrocarbons Ltd. (HHI)

Calgary Alberta Canada

Petróleo Brasileiro S.A. (Petrobras)

Rio de Janeiro Brasil
Petróleos de Venezuela, S.A. (PDVSA) Caracas Venezuela
Petróleos Mexicanos (PEMEX) Mexico City Mexico
Petroleum Authority of Thailand (PTT) Thailand
Petroleum Development Corporation (PDC) Bridgeport West Virginia USA
Petroliam Nasional Berhad (Petronas) Kuala Lumpur Malaysia
Petromet Resources Limited
Petrominerales Colombia Ltd. / Petrobank Energy and Resources Ltd. Bogotá Colombia
Petrominerals Corporation
PetroQuest Energy, Inc. Lafayette Louisiana USA
Petroz NL
Petsec Energy Ltd
PEYTO Exploration & Development Corp.
Phillips Petroleum Company / ConocoPhillips Company
Bartlesville Oklahoma USA
Phoenix Resources LLC
Pinnacle Oil International Inc.
Pioneer Natural Resources Canada Inc. / Pioneer Natural Resources Company Calgary Alberta Canada
Pioneer Natural Resources Company Irving Texas USA
Pioneer Natural Resources USA, Inc. / Pioneer Natural Resources Company
Irving Texas USA
Pioneer Oil and Gas
PIRA Energy Group
Pitts Energy Group Dallas Texas USA
Pivotal Energy Ltd. merger with Fairborne Energy Ltd. Calgary Alberta Canada
Place Resources Corporation
Plains Exploration & Production Company (PXP) Houston Texas USA
Plains Resources Inc. Houston Texas USA
Plantation Petroleum Holdings, LLC Houston Texas USA
Plateau Energy Corp. Kingsville Ohio USA
PLEXUS Energy Ltd.
Pogo Hungary Ltd. / Pogo Producing Company Budapest Hungary
Pogo Producing Company Houston Texas USA
Polish Oil and Gas Company
Portfolio Oil & Gas, Inc
Power Exploration, Inc.
Prairie Pacific Energy Corporation
Premier Oil plc London England UK
Prima Energy Corporation Denver Colorado USA
PrimeEnergy Corporation Stamford Connecticut USA
PrimeWest Energy Trust
Primo Resources Ltd.
Prize Operating Company Texas USA
Production Gathering Company, LLC
Progress Energy Ltd. Calgary Alberta Canada
Promax Energy Inc.
Provident Energy Trust Calgary Alberta Canada