Alamo Resources Energy Resource Technology Newfield Exploration
Anadarko Petroleum Corporation Energy XXI Nexen Petroleum
Apache Corporation ENI US Operating Noble Energy
APEX Oil & Gas Enron ORX Exploration
Arena Offshore EOG Resources OXY
Aries Resources EXCO Resources Plains Exploration
ATP Oil & Gas Extex Operating Range Energy Ventures
Badger Oil Corporation Felice Exploration Renaissance Petroleum
Basin Exploration Fire Wheel Energy Ridgelake Energy
Bass Enterprises Flex Energy Samson Contour Energy
BEPCO Gold King Operating Samson Lone Star
Beryl Oil & Gas GOM Shelf Sanchez O&G
Block "T" Gulf Coast Energy Resources SandRidge Energy
BOPCO Hallwood Petroleum Shoreline Southeast
Boss E & P Helix Energy Solutions Group Southwestern Energy
BP HESS Corporation SPN Resources
Breton Energy Hilcorp Energy St. Mary Land & Exploration
Burlington Resources Hunt Petroleum Stone Energy Corporation
Centurion Exploration Jordan O & G Summit Energy
Century Exploration Kerr-McGee China Swift Energy Company
Chesapeake Energy Kerr-McGee O & G TANA Exploration
Chevron Kosmos Energy Texas Petroleum Investments
Cheyenne Petroleum Layline Petroleum Toce Operating
Cimarex Energy LEED Petroleum Tullow Ghana Limited
Clovelly Oil Company LLOG Exploration Ultra Petroleum
ConocoPhillips Mack Energy Unit Petroleum
Cornerstone E&P Manti Operating US Liquids
Deep Gulf Energy Mariner Energy VENOCO
Devon Energy Maritech Resources Woodside Energy
Dominion E & P Marlin Coastal XTO Energy
Dune Operating McMoran O & G Zone Energy
Dynamic Offshore Resources Medco Energy US
Edge Petroleum Merit Energy
EnCana O & G MidStates Petroleum Company
Endeavor Natural Gas Moon Hines Tigrett Operating Company
Energy Partners Murphy Exploration
 
   
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