Cobalt International Energy Inc. is an independent oil and gas exploration and production company, focused on the deepwater U.S. Gulf of Mexico, offshore Angola and Gabon. The company is based in Houston, Texas, formed in 2005. Cobalt International Energy Inc s leasehold position in the U.S. Gulf of Mexico comprises 225 deepwater blocks, covering approximately 1.3 million gross acres (0.6 million net acres), with 48 prospects in three trends, including the Tahiti Basin Miocene, the Adjacent Miocene and the inboard Lower Tertiary.