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 |
| Agência
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 |
|
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. |
|||
|
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 |
| 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 |
| BPI Industries Inc. | Vancouver | British Columbia | Canada |
| 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
|
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| BWAB Incorporated
|
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| 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. |
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.
|
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| 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
|
|||
|
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. |
Calgary | Alberta | Canada |
| Choice Resources Corp. | Calgary | Alberta | Canada |
| Chrome Energy Corporation
|
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| Chugach Alaska Corporation (CAC) | Anchorage | Alaska | USA |
| Cimarex Energy Company | Denver | Colorado | USA |
| Cinco Land & Exploration, Inc. | Houston | Texas | USA |
| 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 |
Malaysia | ||
| Crestar Energy Inc. | Calgary | Alberta | Canada |
| Crispin Energy Inc. | Calgary | Alberta | Canada |
| Fort Worth | Texas | USA | |
| Crown Petroleum, LLC | Austin | Colorado | USA |
| Cubacan Exploration
Inc. |
|||
| Curlew
Lake Resources Inc. |
Langley | British Columbia | Canada |
| CVL
Resources Ltd. |
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| 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
|
|||
|
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. |
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 |
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) |
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. |
|||
|
formerly Enron Oil & Gas Company (EOG) |
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. |
Calgary | Alberta | Canada |
Esprit
Energy Trust 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 | |
|
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. |
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. |
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 | Houston | Texas | USA |
| Gentry
Resources Ltd. |
Calgary | Alberta | Canada |
| Geocan Energy 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 |
| 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 | |||
| Calgary | Alberta | Canada | |
|
formerly
High Point Energy Corp. |
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 | 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) |
Calgary | Alberta | Canada |
| Husky
Energy Inc. formerly Husky Oil Ltd. |
Calgary | Alberta | Canada |
Husky Oil Ltd. |
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. |
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. |
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. | |||
| 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 | |||
|
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. |
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 |
| 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 |
|
formerly Hurricane Hydrocarbons Ltd. (HHI)
|
Calgary | Alberta | Canada |
| 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 |
| PTT
Exploration & Production Plc (PTTEP) |
Bangkok | Thailand | |
| Purcell Energy Ltd. | Calgary | Alberta | Canada |
| Pure Resources, Inc. / Unocal Corporation | Midland | Texas | USA |
| PYR Energy Corporation | Denver | Colorado | USA |
| Pyramid Energy Inc. | |||
| Q Energy Limited | |||
| Quarry Oil & Gas Ltd. / Assure Energy, Inc. | Calgary | Alberta | Canada |
Qatar General Petroleum Corporation (QGPC) now Qatar Petroleum |
|||
| Qatar
Petroleum formerly Qatar General Petroleum Corporation (QGPC) |
Doha | Qatar | |
| Quest Cherokee, LLC / Quest Resource Corporation + Cherokee Energy Partners / ArcLight Capital Partners, LLC | USA | ||
| Quest Resource Corporation | Oklahoma City | Oklahoma | USA |
| Questar Corporation | Salt Lake City | Utah | USA |
| Questar Exploration and Production Company (QEP) / Questar Market Resources, Inc. / Questar Corporation | Salt Lake City | Utah | USA |
| Quicksilver Resources, Inc. | Fort Worth | Texas | USA |
| Quintana Minerals
Corporation |
Houston | Texas | USA |
| Raider Resources Ltd. | |||
| Rally Energy Corp. | Calgary | Alberta | Canada |
| RAM Energy, Inc. | |||
| Ramco Energy plc | |||
| Range Energy Inc. formerly Range Petroleum Corporation |
Calgary | Alberta | Canada |
Range Petroleum Corporation now Range Energy Inc. |
|||
| Range Resources Corporation | Fort Worth | Texas | USA |
| Ranger Oil Limited | |||
| Rapidfire Resources Ltd. | |||
| Raptor Capital Corporation | |||
| Regent Resources Ltd. | |||
| Remington Oil and Gas Corporation | Dallas | Texas | USA |
| REPSOL YPF | |||
| Repsol-YPF S.A. | |||
| Resolute Natural Resources Company / Resolute Holdings LLC | USA | ||
| Resource America, Inc. | |||
| Riata Energy, Inc. | Amarillo | Texas | USA |
| Richland Minerals,
Inc. |
|||
| Ridel Resources Ltd. | |||
| Rider
Resources Ltd. formerly Rider Resources Inc. formerly IEI Energy Inc. formerly 840927 Alberta Ltd. |
Calgary | Alberta | Canada |
| Ridgewood Energy Corporation / Ridgewood Companies | Ridgewood | New Jersey | USA |
| Rio Alto Resources International Inc. | Calgary | Alberta | Canada |
| RIO Nevada Energy Inc. | |||
| Rising Star Energy | |||
| ROCO Petroleum, Incorporated | |||
| Roseland Resources Ltd. | Calgary | Alberta | Canada |
| Calgary | Alberta | Canada | |
| Rosewood Resources, Inc. | Dallas | Texas | USA |
| Rowtech Energy (Ecuador) / 50% Genesis Eurasia Corporation | Ecuador | ||
| Roy M. Huffington, Inc. | Houston | Texas | USA |
| Royal Dutch Shell Group | |||
| Royale Energy, Inc. | San Diego | California | USA |
| Ruhrgas AG | |||
| Ruwco Oil and Gas Corporation | |||
| Ruwwe and Glasscock | |||
| RWE-DEA Aktiengesellschaft für Mineraloel und Chemie | |||
| RWE-DEA Norge | |||
| Sable Offshore Energy Project (SOEP) | Halifax | Nova Scotia | Canada |
| Saga Petroleum | |||
| Samedan Oil Corporation / Noble Energy, Inc | Ardmore | Oklahoma | USA |
| Samson Investment Company | Tulsa | Oklahoma | USA |
| Samson Resources Company / Samson Investment Company | Tulsa | Oklahoma | USA |
| Santa Fe Snyder Corp. / Devon Energy Corporation |
Houston | Texas | USA |
| Santos Americas & Europe Corporation / Santos Ltd | |||
| Santos Ltd | Adelaide | South Australia | Australia |
| Santos USA Corp (SUSAC)
/ Santos Americas & Europe Corporation / Santos
Ltd |
Houston | Texas | USA |
| Sapient Energy | |||
|
formerly Crest Petroleum Berhad
|
Malaysia | ||
| Sasol Petroleum International (Pty) Ltd. | Rosebank | South Africa | |
| Saudi Arabian Oil Company (Saudi Aramco ) | Dhahran | Saudi Arabia | |
| Savage
Resources LLC |
Rifle | Colorado | USA |
| Scandpower | |||
| Schwanberg International | |||
| Scimitar Hydrocarbons Corporation | |||
| Scotia Group | |||
| Search Energy Corp. | |||
| SEECO, Inc. / Southwestern Energy Company (SWN) | Fayetteville | Arkansas | USA |
| Seine River Resources, Inc. | |||
| Sendero Energy, Inc. | Dallas | Texas | USA |
| Seneca Energy Canada,
Inc. / Seneca Resources
Corporation / National
Fuel Gas Company formerly National Fuel Exploration Corp. (NFEX) formerly Tri Link Resources Ltd. |
Calgary | Alberta | Canada |
| Seneca Resources Corporation / National Fuel Gas Company | Houston | Texas | USA |
| Servo-Dynamics, Inc. | |||
| Seven Seas Petroleum Inc. | |||
| Seventh Energy Ltd. | |||
| Sharpe Resources Corporation | |||
| Shell | |||
| Shell Argentina | |||
| Shell Australia | |||
| Shell Belgium | |||
| Shell Brazil | |||
| Shell Brent Spar | |||
| Shell Brunei | |||
| Shell Canada Limited | Calgary | Alberta | Canada |
| Shell Denmark | |||
| Shell Europe (euroShell) | |||
| Shell Exploration & Production Company | |||
| Shell France | |||
| Shell Germany | |||
| Shell Group | |||
| Shell Hong Kong | |||
| Shell Iceland | |||
| Shell Information Services Company | |||
| Shell International B.V. / Royal Dutch/Shell Group of Companies | The Hague | The Netherlands | |
| Shell International Ltd. / Royal Dutch/Shell Group of Companies | London | England | UK |
| Shell Malaysia | |||
| Shell Netherlands | |||
| Shell Nigeria | |||
| Shell Norway | |||
| Shell
Oil Company |
Houston | Texas | USA |
| Shell Philippines | |||
| Shell R&D Amsterdam | |||
| Shell Resources plc / Royal Dutch/Shell Group of Companies | |||
| Shell Singapore | |||
| Shell South Africa | |||
| Shell Switzerland | |||
| Shell UK | |||
| Shell USA | |||
| Shell - US | |||
| Shell Western E&P | |||
| Siberian Oil Company | |||
| SIDANCO | |||
| Sinochem International Oil Company | |||
|
formerly
Yukong Ltd. |
Seoul | South Korea | |
| Slawson Exploration Company, Inc. / Slawson Companies, Inc. | Wichita | Kansas | USA |
| Slovene Oil Company | |||
| Smith Production Inc. | Houston | Texas | USA |
| SOCDET Management Limited | |||
| SOCO International plc | |||
| Solv-Ex Corporation | |||
| Sonat Exploration | |||
| Sonatrach | |||
| South Jersey Industries, Inc. | |||
| Southern Mineral Corp. (SMC) / PetroCorp, Inc. / Unit Corporation | Houston | Texas | USA |
| Southern Pacific Petroleum N.L. | |||
| Southward Energy Ltd. / 1022971 Alberta Ltd. / Hawker Resources Inc. | Canada | ||
| Southwestern Energy Company | |||
| Southwestern Energy
Production Company (SEPCO) / SEECO, Inc. / Southwestern
Energy Company (SWN) |
Houston | Texas | USA |
| Spinnaker Exploration Company | Houston | Texas | USA |
| Spire Energy Ltd. | |||
| Statoil ASA | Stavanger | Norway | |
| St. Mary Land & Exploration Company | Denver | Colorado | USA |
| StarPoint Energy Ltd. | |||
| Sterling Energy, Inc. / Sterling Energy plc | Houston | Texas | USA |
| Sterling Energy plc | Harpenden | England | UK |
| Stewart Petroleum Corporation | |||
| Stone Energy Corporation | Lafayette | Louisiana | USA |
| Storm Energy Inc. | |||
| Strata Production
Company |
Roswell | New Mexico | USA |
| Stratic Energy Corporation | |||
| Sulphur River Exploration LP | Dallas | Texas | USA |
| Summit Resources | |||
| Suncor Energy Inc. | Calgary | Alberta | Canada |
| Sunoco, Inc. | |||
| Surge Petroleum, Inc. | |||
| Surgutneftegas | Surgut | Tyumen | Russia |
| Swift Energy Company Inc | Houston | Texas | USA |
| Sydney Oil Company Drilling and Exploration Trust (SOCDET) | |||
| Syncrude Canada Ltd. | Fort McMurray | Alberta | Canada |
| Synergos International Oil & Gas, LLC | Arlington | Texas | USA |
| Syntroleum Corporation | |||
| Talisman Energy Inc. | Calgary | Alberta | Canada |
| Talon Development Company | |||
| Talon Production, Inc. | |||
| Taylor Energy Company
|
New Orleans | Louisiana | USA |
| Teikoku Oil Co., Ltd. | |||
| Tejas Power | |||
| Tengasco, Inc. | Knoxville | Tennessee | USA |
| TEPCO | |||
| Tethys Energy Inc. | |||
| Teton Petroleum Company | |||
| Texaco Brasil | |||
| Texaco Exploration & Production, Inc. / TEPI Holdings, Inc. / Texaco Inc. / ChevronTexaco Corporation | Houston | Texas | USA |
| Texaco Natural Gas | |||
Texas Meridian Resources Corporation (TMRC) |
Houston | Texas | USA |
| Texoil Oil and Gas | |||
| Thaipo Limited / Pogo Producing Company | Bangkok | Thailand | |
| The American Energy Group | |||
| The Anschutz Overseas
Corporation (TAOC) / The Anschutz Corporation |
Denver | Colorado | USA |
| The Exploration Company of Delaware, Inc. | |||
| The Hamilton Companies LLC | Denver | Colorado | USA |
| The Houston Exploration Company | Houston | Texas | USA |
| The Meridian Resource Corporation (TMR) formerly Texas Meridian Resources Corporation (TMRC) |
Houston | Texas | USA |
| The Muskegon Development Company | Mount Pleasant | Michigan | USA |
| The Wiser Oil Company | Dallas | Texas | USA |
| Thunder Energy Inc. | Calgary | Alberta | Canada |
| Tipperary Corporation | Denver | Colorado | USA |
| Tokyo Gas Company, Ltd. | Tokyo | Japan | |
|
Tom Brown, Inc. / EnCana Oil & Gas (USA) Inc. / EnCana
Corporation |
Denver | Colorado | USA |
| Torch Energy Advisors Incorporated | Houston | Texas | USA |
| Toreador Resources Corporation | Dallas | Texas | USA |
| Torino Oil and Gas Limited | Calgary | Alberta | Canada |
| Total Fina Elf SA | Paris | France | |
| Total Exploration Production / Total Fina Elf SA | Courbevoie | France | |
| Total Exploration Production
USA, Inc. / Total Exploration Production / Total
Fina Elf SA |
Houston | Texas | USA |
| TotalFinaElf E&P USA, Inc. / Total Fina Elf SA | Houston | Texas | USA |
| Touchstone Resources Ltd | Vancouver | British Columbia | Canada |
| Touchstone Resources USA, Inc. / Touchstone Resources Ltd. | Houston | Texas | USA |
| Tracer Petroleum Corporation / Forum Energy Corporation | Calgary | Alberta | Canada |
| TransAtlantic Petroleum Corp. | Calgary | Alberta | Canada |
| Trans-Dominion Energy Corporation | |||
| TransGlobe Energy Corporation | Calgary | Alberta | Canada |
| Trans-Orient Petroleum Ltd. | |||
| TransTexas Gas Corporation | Houston | Texas | USA |
| Trek Resources, Inc. | Dallas | Texas | USA |
| Triana Energy, Inc. | Charleston | West Virginia | USA |
| Triton Energy | |||
| Triumph Energy Corporation / Baytex Energy Trust | Calgary | Alberta | Canada |
|
Tri-Valley Oil & Gas Co. Tri-Valley Power Corporation |
|||
| Troutline Investments Inc. / Innova Exploration Ltd. | Calgary | Alberta | Canada |
|
True Companies, Inc. |
Casper | Wyoming | USA |
| True Oil Company /
True Companies, Inc. |
Casper | Wyoming | USA |
| Tullow Oil plc | |||
| Ankara | Turkey | ||
| Tusk Energy Inc. | Calgary | Alberta | Canada |
| Tyumen Oil Company | |||
| U.S. Crude Ltd. | |||
| U.S. Energy Corp. | |||
| U.S. Oil and Gas Inc. | |||
| Ulster Petroleum Ltd. | |||
| Ultra Petroleum Corp. | Houston | Texas | USA |
| Ultra Petroleum Ltd. / Ultra Petroleum Corp. | Vancouver | British Columbia | Canada |
| Unit Corporation | Tulsa | Oklahoma | USA |
| Unit
Petroleum Company / Unit
Corporation |
Tulsa | Oklahoma | USA |
| United Heritage Corporation | |||
| United Meridian Corporation | |||
| United States Exploration, Inc. | |||
| Unocal Corporation | El Segundo | California | USA |
| Upton Resources Inc. / StarPoint Energy Ltd. | |||
| VAALCO Energy, Inc. | |||
| Van Operating, Ltd.
|
Albany | Texas | USA |
| Vanco Energy Company | |||
| Vanguard Oil Corporation | |||
| Vastar Resources, Inc. | |||
| VEBA Oel AG | |||
| Vector Energy Corporation | |||
| Velvet Exploration Ltd. / El Paso Corporation | Canada | ||
| Venoco, Inc. | Carpinteria | California | USA |
| Venus Exploration, Inc. / PYR Energy Corporation | Denver | Colorado | USA |
| Vermilion
Energy Trust formerly Vermilion Resources Ltd. |
Calgary | Alberta | Canada |
Vermilion Resources Ltd. |
Calgary | Alberta | Canada |
| Victoria Petroleum N.L. | |||
| Viking Energy Royalty Trust | Calgary | Alberta | Canada |
| Vintage Petroleum, Inc. | Tulsa | Oklahoma | USA |
| Vortex Energy & Minerals Ltd. | |||
| Wagner & Brown, Ltd. | Midland | Texas | USA |
| Wagner Oil Company | Fort Worth | Texas | USA |
| Walter Oil & Gas Corporation | Houston | Texas | USA |
| Ward Petroleum Corporation | Enid | Oklahoma | USA |
| Wavetech Geophysical | |||
| West Oil NL | |||
| West Texas Gas, Inc. (WTG) | Midland | Texas | USA |
| Westcoast Energy Inc. / Duke | |||
| Western Gas Resources, Inc. | |||
| Western Oil Sands Inc. | Calgary | Alberta | Canada |
| Westminster Resources Ltd. | Calgary | Alberta | Canada |
| Westmount Energy Limited | UK | ||
| Westport Resources
Corporation / Kerr-McGee Corporation |
Denver | Colorado | USA |
| Wexpro Company / Questar Market Resources, Inc. / Questar Corporation | Salt Lake City | Utah | USA |
| Whiting Petroleum Corporation / Alliant Energy Resources, Inc. / Alliant Energy Corporation | Denver | Colorado | USA |
| WhitMar Exploration Company | |||
Williams Exploration & Production Company / Williams Companies |
Tulsa | Oklahoma | USA |
| Williams Companies | Tulsa | Oklahoma | USA |
| Williams Production RMT Corp. / Williams Companies | USA | ||
| Winona Oil Company | Denver | Colorado | USA |
| Wintershall AG / BASF AG | Kassel |
Germany | |
| Wiser Oil Company, The | Dallas | Texas | USA |
| Woodside Petroleum Ltd. | Perth | Western Australia | Australia |
| Woolsey Petroleum Corporation | Wichita | Kansas | USA |
| Fort Worth | Texas | USA | |
| Yates Petroleum Corporation | Artesia | New Mexico | USA |
Yukong Ltd. now
SK Corporation |
Seoul | South Korea | |
| Zarara Oil and Gas Limited | San Antonio | Texas | USA |
| Zargon Oil & Gas Limited | Calgary | Alberta | Canada |
| Zavanna, LLC | Denver | Colorado | USA |
| Zavanna Canada Corp. / Zavanna, LLC | Canada | ||
| Zinke & Trumbo, Inc. | Tulsa | Oklahoma | USA |