Marathon Gets Green Light for Manned Subsea Operations on Alvheim

Petroleum Safety Authority Norway

Marathon Petroleum Norge AS has been given consent to perform manned subsea operations on Alvheim in connection with the development of the field.

Start up of the planned work is around July 10, 2006. The diving operations will last approximately 60 days.

The Alvheim development was approved October 8, 2004. The field contains both oil and gas.

Alvheim is a joint development of the discoveries Kameleon, Kneler and Boa. The discoveries are located in the North Sea, west of the Heimdal field. Alvheim will be developed using seabed installations tied in to a floating production and oil storage vessel.