• Apache Finance Canada Corp
• Platina Energy Group Inc.
• Turner Valley Oil & Gas Inc
• Sharewell Capital Group, Inc.
• Vision Energy Inc
• Petrobras Energia Participaciones SA
• Rochester Resources Ltd
• Avenue Group Inc
• Reef Global Energy Ventures
• Western Oil Sands Inc
• Sonoran Energy Inc
• Petrocal Inc
• Viking Energy Group Inc
• Enterprise Products Operating L P
• Northern Oil and Gas Inc.
• Velocity Energy Inc.
• Star Energy Corp
• Chesapeake Knan Acquisition LLC
• Ivanhoe Energy Inc
• PetroChina Co. Ltd.
• Duke Energy Field Services Corp
• Qep Resources, Inc.
• Petrol Oil & Gas Inc
• Kodiak Energy, Inc.
• Lewis Bobby P
• American Energy Production Inc
• Providence Resources Inc
• Burlington Resources Finance Co
• Endeavour International Corp
• CannAwake Corp
• Khanty Mansiysk Oil Corp
• Rocky Mountain Energy Corp
• Enterra Energy Trust
• Westport Resources Corp
• American Motorcycle CORP
• Petroleo Brasileiro S.A.- Petrobras
• Dcp Midstream, LLC
• Fortune Oil & Gas Inc
• South Shore Resources Inc.
• Friendly Energy Exploration
• HESS BAKKEN INVESTMENTS I Corp
• Petrofund Energy Trust
• Atp Oil & Gas Corp
• Arena Resources Inc
• Far East Energy Corp
• Encore Acquisition Co
• Powder River Petroleum International, Inc.
• Wheeler Carrie
• Enerplus Corporation
• Gmx Resources Inc

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