

Clients
Aera Energy L.L.C.
Angus Energy, Inc.
Arthur D. Little
BG Group
Blade Energy Partners
Chevron Corporation
COG Operating, L.L.C.
ConocoPhillips Company
Cypress Minerals, L.L.C.
DeGolyer and MacNaughton
Devon Energy Corp.
El Paso Production Oil & Gas Co. and El Paso PetrĂ³leo do Brasil
Emerald Energy Resources Limited
EnCana Corp.
ExxonMobil
GPA Energy S.A. de C.V. (Mexico)
Gulf Keystone Petroleum Ltd.
HRT Africa Petroleo S.A.
Harding Company
Hardy Oil & Gas Ltd. (UK) and Hardy Exploration & Production (India) Inc.
Hunt Overseas Oil Co. and Jannah Hunt Oil Co.
Hyperion Resources, Inc.
IHS Energy
Lewis Energy Group
NPC Engineering Group
Occidental Oil and Gas Corp.
Oliver Wyman Group
OPC
Pluspetrol S. A. and Pluspetrol Peru Corp. S.A.
Repsol YPF
Shell International E & P
Shona Energy L.L.C.
Talisman (Colombia) Oil & Gas Ltd. and Talisman (Trinidad) Petroleum Ltd.
Tap Energy (Brunei)
TEES (Texas Engineering Experiment Station)
Victoria Oil & Gas Ltd.
YPFB – Chaco