Part I DESIGNATED OWNERS

Agip (U.K.) Limited, whose registered office is at Southside, 105 Victoria Street, London SW1E 6QU.

ARCO British Ltd., whose principal place of business in the United Kingdom is at ARCO House, 48 Grosvenor Street, London W1X 0AN.

Canadian Superior Oil (UK) Ltd., whose registered office is at Mobil Court, 3 Clements Inn, London WC2A 2EB.

Acre Petroleum Ltd., whose registered office is at Rivermill House, 152 Grosvenor Road, London SW1V 3JL.

Deminex (UK) Oil and Gas Limited whose registered office is at Bowater House, 68 Knightsbridge, London SW1X 7LD.

Fina Exploration Ltd., whose registered office is at Petrofina House, Epsom, Surrey, KT19 5AD.

LASMO North Sea P.L.C., whose registered office is at Bastion House, 140 London Wall, London EC2Y 5DN.

Phillips Petroleum Company United Kingdom Ltd., whose registered office is at Phillips Quadrant, 35 Guildford Road, Woking, Surrey GU22 7QT.

Elf Oil and Gas (UK) Ltd., whose registered office is at 10 Babmaes Street, London SW1Y 6HE.

Sun Oil Britain Limited, whose principal place of business in the United Kingdom is at Sun Oil House, 80 Hammersmith Road, London W14 8YS.

Superior Oil (UK) Ltd., whose registered office is at Mobil Court, 3 Clements Inn, London WC2A 2EB.