Gabon	6 Months Ended
Jun. 30, 2011
Gabon [Abstract]
Gabon	Note 11 — Gabon We are the operator of the Dussafu PSC offshore Gabon in West Africa with a 66.667 percent ownership interest. The Dussafu PSC partners and the Republic of Gabon, represented by the Ministry of Mines, Energy, Petroleum and Hydraulic Resources (“Republic of Gabon”), entered into the second three-year exploration phase of the Dussafu PSC with an effective date of May 28, 2007. In order to complete drilling activities of the first exploratory well, in March 2011, the Direction Generale Des Hydrocarbures (“DGH”) approved a second one-year extension to May 27, 2012 of the second exploration phase. A Standby Letter of Credit was issued on April 8, 2011 for the Transocean Sedneth 701 semi-submersible drilling unit. We took possession of the drilling unit mid-April 2011 on a one well contract. A second Standby Letter of Credit was issued April 7, 2011 for the Subsea 7 Remote Operated Vehicle. See Note 5 — Commitments and Contingencies for a discussion of legal matters related to our Gabon operations. The Dussafu PSC represents $24.5 million and $9.2 million of unproved oil and gas properties on our June 30, 2011 and December 31, 2010 balance sheets, respectively.

Note 11 — Gabon

We are the operator of the Dussafu PSC offshore Gabon in West Africa with a 66.667 percent ownership interest. The Dussafu PSC partners and the Republic of Gabon, represented by the Ministry of Mines, Energy, Petroleum and Hydraulic Resources (“Republic of Gabon”), entered into the second three-year exploration phase of the Dussafu PSC with an effective date of May 28, 2007. In order to complete drilling activities of the first exploratory well, in March 2011, the Direction Generale Des Hydrocarbures (“DGH”) approved a second one-year extension to May 27, 2012 of the second exploration phase.

A Standby Letter of Credit was issued on April 8, 2011 for the Transocean Sedneth 701 semi-submersible drilling unit. We took possession of the drilling unit mid-April 2011 on a one well contract. A second Standby Letter of Credit was issued April 7, 2011 for the Subsea 7 Remote Operated Vehicle.

See Note 5 — Commitments and Contingencies for a discussion of legal matters related to our Gabon operations.

The Dussafu PSC represents $24.5 million and $9.2 million of unproved oil and gas properties on our June 30, 2011 and December 31, 2010 balance sheets, respectively.