Marathon Oil Corporation announced today that its subsidiary, Marathon International Petroleum Angola Block 31 Limited, has participated in the deepwater Tebe discovery well in the southern portion of Block 31 offshore Angola.

The Tebe discovery well is located approximately 7 miles southeast of the Hebe discovery announced in October 2005 and approximately 220 miles northwest of Luanda, Angola.

The well was drilled in a water depth of approximately 5,700 feet and reached a total measured depth of approximately 11,400 feet. The well test results confirmed the capacity of the reservoir to flow in excess of 5,000 barrels per day.

Located in the northeast sector of Block 31, the PSVM development is proceeding with first production targeted in 2012.

The concessionaire of Block 31 is Sonangol, Angola's state-owned oil company. Marathon holds a 10 percent interest in Block 31. The operator is BP Exploration (Angola) Limited with 26.67 percent. The other interest owners are Esso Exploration and Production Angola (Block 31) Limited with 25 percent, Sonangol P&P with 20 percent, Statoil Angola A.S. (a subsidiary of StatoilHydro ASA) with 13.33 percent, and TEPA (BLOCK 31) LIMITED, a subsidiary of the Total Group with 5 percent.