Members

• AGIP Petroleum
• Amerada Hess
• Apache Corp.
• BHP Billiton
• BP
• Burlington Resources
• Chevron
• ConocoPhillips, Inc.
• Devon Energy
• EnCana Corporation
• ExxonMobil
• Japan National Oil Corp.
• Kerr-McGee Oil & Gas Corp
• Marathon Oil Company
• Nexen Inc.
• Occidental OIL and GAS Corporation
• OMV Aktiengesellschaft
• Pemex
• Petro-Canada Resources
• PETROBRAS
• Petrorama Trading L.L.C.
• Saudi Aramco
• Shell Canada Limited
• Shell E & P Technology
• Sunterra Oil & Gas
• The Williams Companies
• Total Fina Elf
• Unocal Corporation