| Abu Dhabi Co. for Onshore Oil Operations | Mobil Exploration Norway Inc. |
| Amoco (UK) Exploration Co. | LASMO North Sea plc. |
| Anglia Power & Gas | Murphy Petroleum Ltd. |
| Bow Valley Petroleum | Neste Exploration Ltd. |
| Brass Petroleum Unlimited | Oryx U.K. Energy Company |
| British-Borneo Petroleum Syndicate plc. | Petroconsultants (UK) Ltd. |
| Burmine Limited (Australia) | Petroleum Development Oman |
| Cairn Energy plc. | Ranger Oil (U.K.) Ltd. |
| Clyde Petroleum Exploratie BV (Holland) | Ranger Oil Limited/Hydro-Congo |
| Elf UK Ltd. | Santos Europe Ltd. |
| Enterprise Oil plc. | Southern Electric plc. |
| Hamilton Oil Company Ltd. | Sonangol (Angola) |
| Kerr-McGee Oil (UK) plc. | Sonatrach (Algeria) |
| Pannell Kerr Forster | Talisman Energy (U.K.) Ltd. |
| Premier Oil plc. | Tullow Oil plc. |
Project locations:-