These are lists of petroleum companies.

List of companies by size of oil reserves

A list of the largest petroleum companies is always somewhat arbitrary as state-owned companies operate differently to private-owned ones. As of April 2007 here are the list of the biggest petroleum companies in terms of oil reserves, figures in billions of barrels:

• Saudi Arabian Oil Company 295
• National Iranian Oil Company 287
• Qatar Petroleum 165
• Abu Dhabi National Oil Company 137
• Iraq National Oil Company 137
• Gazprom 115
• Kuwait Petroleum Corporation 107
• Petróleos de Venezuela S.A. 102
• Nigerian National Petroleum Corporation 62
• National Oil Corporation (Libya) 45
• Sonatrach 40
• Rosneft 35

Alphabetical list of companies

This is a selected list of petroleum companies in alphabetical order.

• Assam Company Ltd (ACL), India
• Abu Dhabi National Oil Company (ADNOC), United Arab Emirates
*

Alon USA, United States

• Amerada Hess Corporation, United States
• Anadarko Petroleum Corporation, United States
• Apache Corporation, United States
• Arbusto Energy, United States
• Atlantic Petroleum, Faroe Islands
• BG Group, United Kingdom
• Bharat Petroleum Corporation Limited, India
• BHP Billiton, Australia
• BP, United Kingdom
• Cairn Energy, India
• Canadian Natural Resources, Canada
• Chevron Corporation, United States
• Citgo, Venezuela
• CNOOC Ltd., China
• ConocoPhillips, United States
• Cosmo Oil Company, Japan
• Crown Central Petroleum, United States
• Cupet, Cuba
• Devon Energy, United States
• Ecopetrol, Colombia
• Enbridge, Canada
• EnCana, Canada
• ENSCO International, United States
• Eni, Italy
• Essar oil ltd.,India
• Entreprise Tunisienne d'Activites Petroliere (ETAP), Tunisia
• ExxonMobil, United States
• Galp Energia, Portugal
• Petronet LNG Limited, India
• Gujarat Gas Co. Ltd., India
• Gujarat State Petroleum Corporation, India
• Gulf Oil, Luxembourg
• Grupa LOTOS, Poland
• Hellenic Petroleum, Greece
• Hindustan Petroleum Corporation Ltd, India
• Husky Energy, Canada
• IB Daiwa, Japan
• Imperial Oil, Canada
• INA - Industrija Nafte, Croatia
• Indian Oil Corporation, India
• Inpex, Japan
• Irving Oil, Canada
• Japan Energy, Japan
• Kerr-McGee, United States
• Koch Industries, United States
• Kuwait German Petroleum Company, Canada
• LUKoil, Russia
• Marathon Oil Corporation, United States
• Maxol Group, Republic of Ireland
• MedcoEnergi, Indonesia
• Mol Group, Hungary
• Naftna Industrija Srbije, Serbia
• Naftohaz Ukrainy, Ukraine
• National Iranian Oil Company (NIOC), Iran
• National Oil Corporation, Libya
• Neste Oil, Finland
• Nippon Oil, Japan
• NNPC,Nigeria
• Northern Resources ,Canada
• Oil & Gas Development Company Limited , Pakistan
• Occidental Petroleum
• Oil India Limited, India
• Oman Oil Company (OOC), Oman
• OMV, Austria
• ONGC, India
• PKN Orlen S.A., Poland
• PSO, Pakistan
• Petróleos de Venezuela, Venezuela
• Petroleos Mexicanos, Mexico
• Petro-Canada, Canada
• Petrobras, Brazil
• PetroChina, China
• PetroKazakhstan, Canada
• Petrom, Romania
• Petron Corporation, Philippines
• PETRONAS, Malaysia
• PETROTRIN, Trinidad and Tobago
• Pertamina, Indonesia
• Polish Oil and Gas Company, Poland
• Qatar Petroleum, Qatar
• Reliance Industries Limited, India
• Repsol YPF, Spain
• Rompetrol Group N.V., Romania
• Royal Dutch Shell, Netherlands, United Kingdom
• San-Ai Oil, Japan
• Santos Limited, Australia
• Sasol, South Africa
• Saudi Aramco, Saudi Arabia (the largest in the world)
• Shell Canada, Canada (subsidiary of Royal Dutch Shell)
• Shell Oil Company, United States (subsidiary of Royal Dutch Shell)
• Sinclair Oil, United States
• Sinopec, China
• Snpc, Congo-Brazzaville
• Sonangol, Angola
• Sonatrach, Algeria
• SPC, Singapore
• StatoilHydro, Norway
• State Oil Company of Azerbaijan, SOCAR Azerbaijan
• State Oil Company of Suriname, Suriname
• Sunoco, United States
• Suncor Energy, Canada
• Surgutneftegaz, Russia
• Syncrude, Canada
• Talisman Energy, Canada
• Todd Energy, New Zealand
• Total, France
• United Refining Company, United States
• Vaalco Energy Inc., United States
• Wintershall, Germany
• Woodside Petroleum, Australia
• YPFB, Bolivia
• YUKOS, Russia

References