Libya

Marathon is a member of the Waha Group, which acquired exploration and production rights in Libya in the mid-1950s. Marathon and ConocoPhillips each hold a 16.33 percent working interest in the Waha Concessions, Hess Corporation an 8.16 percent working interest and the
Libyan National Oil Corporation (NOC) holds a 59.16 percent working interest.

The Concessions, which in 2009 produced an average of 340 gross mboepd, encompass almost 13 million acres in the Sirte Basin. This basin is one of the most prolific oil and gas producing
areas of Libya, containing sizable undeveloped oil and gas resources. Marathon's remaining proved reserves in Libya are estimated at 231 mmboe net.