Oil and Gas Producing Companies
This list is not intended to be a comprehensive list of companies in each category and should not be used as such. This list is intended to capture the largest companies in each group that have websites. Where an English language version of the website is available, that link has been included; if an English language version is not available, the native language site has been included.
All of these links are set up to open in a new browser window.
National Oil Companies (wholly or primarily government owned)
- Abu Dhabi National Oil Co. (ADNOC)
- China National Offshore Oil Corp. Ltd. (CNOOC)
- China National Petroleum Corp. (CNPC)
- Chinese Petroleum Corp. [Taiwan]
- Dansk Olie og Naturgas AS (DONG) [Denmark]
- Egyptian General Petroleum Corp. (EGPC)
- Empresa Colombiana de Petroleos (Ecopetrol) [Colombia]
- Empresa Nacional del Petroleo (ENAP) [Chile]
- Fortum Oy [Finland]
- Gazprom [Russia]
- Japan Petroleum Exploration
- Kuwait Petroleum Corp. (KPC)
- Myanmar Oil & Gas Enterprise [Myanmar (Burma)]
- National Iranian Oil Co. (NIOC)
- Nigerian National Petroleum Corp
- Oil & Natural Gas Corp. Ltd. (ONGC) [India]
- Pertamina [Indonesia]
- Petroleo Brasilerio SA (Petrobras)
- Petroleos del Ecuador (PetroEcuador)
- Petroleos del Peru (Petroperu)
- Petroleos de Venezuela SA (PDVSA)
- Petroleos Mexicanos (PEMEX)
- Petroleum Co. of Trinidad and Tobago Ltd. (Petrotrin)
- Petroleum Development Oman LLC
- Petroleum Exploration & Production Authority (PEPA) [Yemen]
- Petronas [Malaysia]
- PTT Exploration & Production Public Co. Ltd. (PTTEP) [Thailand]
- Qatar Petroleum Corp
- Rompetrol [Romania]
- Saudi Arabian Oil Co. (Saudi Aramco)
- Sonangol [Angola]
- Sonatrach [Algeria]
- State Oil Co. of Suriname Ltd. (Staatsolie)
- Statoil ASA [Norway]
- Turkiye Petrolleri Anonim Ortakligi (TPAO) [Turkey]
- PetroVietnam
Integrated Global (Major) Companies
- BP plc
- Chevron Corp.
- ConocoPhillips Co.
- ENI SpA
- ExxonMobil Corp.
- Hess Corp.
- Marathon Oil Corp.
- Murphy Oil Corp.
- Occidental Petroleum Corp.
- Petro-Canada
- Shell (Royal Dutch/Shell Group)
- Total
Additional Companies – Outside the US
- Baytex Energy Ltd.
- BG Group
- BHP Billiton Ltd.
- Cairn Energy plc
- Canadian 88 Energy Corp.
- Canadian Natural Resources Ltd.
- EnCana Corp.
- Energy Africa
- FX Energy
- Husky Energy Inc.
- Ivanhoe Energy
- Lukoil Oil Co.
- Lundin Petroleum AB
- Mosaic Oil N.L.
- Nexen Inc.
- New Zealand Oil & Gas Ltd.
- Norsk Hydro ASA
- OMV AG
- Paramount Resources Ltd.
- Penn West Petroleum Ltd.
- PetroKazakhstan
- Premier Oil plc
- Ramco Energy plc
- Repsol YPF
- Santos Ltd.
- Sherritt International Corp.
- Summit Resources
- Talisman Energy Inc.
- Tap Oil Ltd.
- Tullow Oil plc
- Vanco Energy Co.
- Vermilion Resources Ltd.
Additional (Independent) Companies – US
- Abraxas Petroleum Corp.
- Anadarko Petroleum Corp.
- Apache Corp.
- Berry Petroleum Co.
- Burlington Resources Inc.
- Cabot Oil & Gas Corp.
- Callon Petroleum Co.
- Chesapeake Energy Corp.
- Citation Oil & Gas Corp.
- CMS Energy Corp.
- Denbury Resources Inc.
- Devon Energy Corp.
- Eagle Plains Resources Ltd.
- El Paso Corp.
- Energen Corp.
- EOG Resources Inc
Additional (Independent) Companies – US
- Abraxas Petroleum Corp.
- Anadarko Petroleum Corp.
- Apache Corp.
- Berry Petroleum Co.
- Burlington Resources Inc.
- Cabot Oil & Gas Corp.
- Callon Petroleum Co.
- Chesapeake Energy Corp.
- Citation Oil & Gas Corp.
- CMS Energy Corp.
- Denbury Resources Inc.
- Devon Energy Corp.
- Eagle Plains Resources Ltd.
- El Paso Corp.
- Energen Corp.
- EOG Resources Inc
Additional (Independent) Companies – US
- Abraxas Petroleum Corp.
- Anadarko Petroleum Corp.
- Apache Corp.
- Berry Petroleum Co.
- Burlington Resources Inc.
- Cabot Oil & Gas Corp.
- Callon Petroleum Co.
- Chesapeake Energy Corp.
- Citation Oil & Gas Corp.
- CMS Energy Corp.
- Denbury Resources Inc.
- Devon Energy Corp.
- Eagle Plains Resources Ltd.
- El Paso Corp.
- Energen Corp.
- EOG Resources Inc
- Abraxas Petroleum Corp.
- Anadarko Petroleum Corp.
- Apache Corp.
- Berry Petroleum Co.
- Burlington Resources Inc.
- Cabot Oil & Gas Corp.
- Callon Petroleum Co.
- Chesapeake Energy Corp.
- Citation Oil & Gas Corp.
- CMS Energy Corp.
- Denbury Resources Inc.
- Devon Energy Corp.
- Eagle Plains Resources Ltd.
- El Paso Corp.
- Energen Corp.
- EOG Resources Inc.
- Equitable Resources
- Forest Oil Corp.
- Houston Exploration Co.
- Koch Industries Inc.
- National Fuels
- Newfield Exploration Co.
- Noble Energy
- Pioneer Natural Resources Co.
- Plains Exploration & Produciton Co.
- Ruwco Oil & Gas Corp.
- Questar Corp.
- Stone Energy Corp.
- Swift Energy Co.
- Unocal Corp.
- XTO Energy
