Part I designated owners

Marathon Oil U.K. Ltd., whose registered office is at Marathon House, 174 Marylebone Road, London NW1 5AT.

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

Bow Valley Exploration (U.K.) Ltd., whose registered office is at Windsor House, 50 Victoria Street, London, SW1H 0NW.

Kerr-McGee Oil (U.K.) p.l.c., whose registered office is at Blackfriars House, 19 Newbridge Street, London EC4V 6DB.

Dyas Oil (U.K.) Ltd., whose registered office is at 90 Long Acre, London, WC2E 9NP.

Dyas Exploration (U.K.) Ltd., whose registered office is at 90 Long Acre, London WC2E 9NP.

LL & E (U.K.) Inc., whose principal place of business in the United Kingdom is at LL & E House, 40a Dover Street, London W1X 3RB.

Sovereign Oil and Gas p.l.c., whose registered office is at Portland House, Stag Place, London, SW1E 5BH.

Norsk Hydro Oil and Gas Ltd., whose registered office is at Bridge House, 69 London Road, Twickenham, Middlesex TW1 1EE.