Part I DESIGNATED OWNERS

Britoil p.l.c., whose registered office is at 301 St. Vincent Street, Glasgow, G2 5DD.

Chevron U.K. Limited, whose registered office is at 2 Portman Street, London W1H 0AN.

Enterprise Petroleum Ltd., whose registered office is at 5 Strand, London WC2N 5HU.

LASMO North Sea p.l.c., whose registered office is at Bastion House, 140 London Wall, London EC2Y 5JT.

Murphy Petroleum Ltd., whose registered office is at Winston House, Dollis Park, Finchley, London N3 1HZ.

Ocean Exploration Co. Limited, whose registered office is at Winston House, Dollis Park, Finchley, London N3 1HZ.

Ranger Oil (U.K.) Limited, whose registered office is at Ranger House, 71 Great Peter Street, London SW1P 2BN.