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Private or Publicly Traded Oil Companies
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 Company profiles and summary information provided by Mergent Inc. Copyright © 2004

Oakridge Energy Inc Oil Refineries LimitedOMV AG
Occidental Petroleum CorpOil Search Ltd Oneok Inc
Ocean Rig ASA Oil States International IncOntex Resources Limited
Oceaneering International IncOilex IncOracle Energy Corp
Oceanic Exploration CoOilexco IncOrca Petroleum Inc
O'Connell Oil Associates IncOiltec Resources LtdOrigin Energy Ltd
Octane Energy Services LtdOJSC SurgutneftegasOsaka Gas Co, Ltd
Oesterreichische Industrieholding Aktiengesellschaft Oklahoma Energy Corp Osprey Energy Ltd
Office National De Recherches Et D'Exploitations PetrolieresOlco Petroleum Group Inc Otaki Gas Co Ltd
Offshore Logistics Inc Olympia Energy IncOutput Exploration, LLC
OGE Energy CorpOmax Resources, LtdOy Teboil AB
Oil City Petroleum IncOmega Ventures Group IncOYO Geospace Corp
Oil Co LukoilOmni Energy Services Corp
 
 
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