Part I DESIGNATED OWNERS

Acre Petroleum Ltd., whose registered office is at 90 Long Acre, London WC2E 9NP.

Agip (UK) Ltd., 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 (U.K.) Ltd., whose principal place of business in the United Kingdom is at Mobil Court, 3 Clements Inn, London WC2A 2EB.

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

Elf Oil and Gas Ltd., whose registered office is at 197 Knightsbridge, London SW7 2RZ.

Fina Exploration Ltd., whose registered office is at Petrofina House, 1 Ashley Avenue, Epsom, Surrey KT18 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.

Sun Oil Britain Ltd., whose principal place of business in the United Kingdom is at 90 Long Acre, London WC2 9RG.

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