PRESS RELEASE Malabo – November 14th, 2011   OIL DISCOVERY, CARLA PROSPECT, BLOCK O, OFFSHORE BIOKO ISLAND, EQUATORIAL GUINEA The Ministry of Mines, Industry and Energy is pleased to announce that the Alen 1-G1 Pilot Well has encountered hydrocarbons in the Carla Prospect, Block O, Offshore Bioko Island, Equatorial Guinea. The Alen 1-G1 Pilot, designed as a gas injector well in the Alen Field Development, was deepened as a pilot hole to target the Carla Prospect which underlies the Alen Field, and encountered approximately 9.9 meters of net oil pay in the objective interval. The operator of Block O, Noble Energy, estimates that the discovered gross resources range between 35 and 100 million barrel oil equivalent of which 80 percent is liquids. Recent appraisal work at Diega, a 2008 discovery in Block I, has confirmed a gross resource range of 45 – 110 MMBoe with 60 percent liquids. Noble Energy anticipates developing both Carla and Diega through the infrastructure at Aseng. Both discoveries are expected to contribute production in 2015. The Carla discovery is the 3rd discovery within Block O after the Alen and Carmen discoveries.