Oil & Gas Field Exploration Services Companies – page 2

• Transatlantic Petroleum Ltd.
• Tatham Brothers Securities LLC
• Saratoga Resources Inc
• Egpi Firecreek, Inc.
• Tidelands Oil & Gas Corp/Wa
• Whittier Energy Corp
• Teryl Resources Corp
• Empower Clinics Inc.
• Pure Resources Inc
• China Energy & Carbon Black Holdings, Inc.
• Comanche Energy Inc
• Strathclair Ventures Ltd
• Namesilo Technologies Corp.
• GeoPetro Resources Co
• Promax Energy Inc
• Paladin International Corp
• Atlas America Public #9 Ltd.
• Pdc 2003 Drilling Program
• Centurion Energy Internatonal Inc
• Media888 Inc
• Zion Oil & Gas Inc
• Trek Resources Inc
• Provident Energy Ltd
• Terax Energy, Inc.
• Geocan Energy Inc
• Fellows Energy Ltd
• Texas Nevada Oil & Gas Co
• Spf Energy Inc
• Pure Resources LP
• Pure Resources I Inc
• Pk I LP
• Pk II LP
• Pk III LP
• Pk IV LP
• Pure GP LLC
• Hep Pure LP
• Hec Petroleum Inc
• Hep Pure Acquisition LLC
• Hep Partners LP
• La Plata Associates LLC
• Hec La Plata LLC
• Pacific Rodera Ventures Inc
• Curlew Lake Resources Inc
• Dover Petroleum Inc
• Delta Oil & Gas Inc
• Watch Resources Ltd
• Callaghan Kevin P
• Comeaux Craig S
• Vgs Inc
• Texas Border Gas Co
• Sky Petroleum, Inc.
• Sierra International Group Inc
• Sovereign Chief Ventures Ltd
• Superior Oil & Gas Co
• Colorado 2002A Limited Partnership
• Pdc 2002 B Ltd Partnership
• Pdc 2002 C Ltd Partnership
• Pdc 2002 D Ltd Partnership
• Austin Developments Corp
• Digital Utilities Ventures,inc.
• Paramount Resources Ltd
• Ridgewood Energy K Fund LLC
• Ridgewood Energy L Fund LLC
• Black Raven Energy, Inc.
• Ridgewood Energy M Fund LLC
• Seitel Solutions, Ltd.
• Si Holdings, G.P.
• Global Geophysical Services Inc
• Gulf United Energy, Inc.
• Ridgewood Energy O Fund LLC
• Whiting Canadian Holding Co ULC
• Ridgewood Energy P Fund LLC
• Cgg Americas Inc.
• Sercel Inc.
• Reostar Energy Corporation
• Ridgewood Energy Q Fund LLC
• Colorado Utah Natural Gas, Inc.
• Dominovas Energy Corp
• Unbridled Energy CORP
• Energy XXI Ltd
• Consolidated Oil & Gas, Inc.
• Ridgewood Energy S Fund LLC
• Sentry Petroleum Ltd.
• Alamo Energy Corp.
• Ridgewood Energy T Fund LLC
• Pacific Asia China Energy Inc.
• Power Resource Exploration Inc.
• Performance Drilling Co LLC
• Ridgewood Energy U Fund LLC
• Ridgewood Energy V Fund LLC
• Cgg Land (U.S.) Inc.
• Veritas Geophysical (Mexico) LLC
• Cgg Services (U.S.) Inc.
• Alitheia Resources Inc.
• Veritas DGC Asia Pacific Ltd.
• Veritas Investments Inc.
• Viking Maritime Inc.
• Falconridge Oil Technologies Corp.
• Cardinal Energy Group, Inc.
• Ridgewood Energy W Fund LLC

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