Anadarko Petroleum Corporation
ANKOR Energy LLC
ATP Oil & Gas Corporation
BP Exploration
Century Exploration
Chevron Corporation
ConocoPhillips
El Paso Production Company
Energy Resources Technology
ExxonMobil
Hess Corporation
LLOG Exploration Co.
Marlin Energy, LLC
McMoran Oil & Gas
Murphy Expro USA
Nexen Petroleum Offshore USA, Inc.
Noble Energy
Phoenix Exploration
Samson Offshore Co.
Shell Exploration and Production
Stone Energy
Woodside Energy USA
Anglo-Suisse Offshore Partners
Apache Corporation
BHP Billiton Americas Inc.
Castex Offshore
Challenger Minerals
Cobalt International Energy
Devon Energy Corporation
Energy Partners LTD
Eni Petroleum
Helis Oil & Gas
Juneau Exploration, L.P.
Marathon Oil Co.
Maersk Oil America, Inc.
Mariner Energy, Inc.
Marubeni Oil & Gas USA Inc.
Newfield Exploration Co.
Nippon Oil Exploration USA Limited
Petrobras America Inc.
Plains Exploration & Production Co.
Statoil
Total E & P
