New Pre-Salt discovery in the Marlim Field

Rio de Janeiro, June 4, 2010 – Petróleo Brasileiro S.A. - Petrobras announces the discovery of a new accumulation of light oil (29^o API) in the pre-salt layer in the Campos Basin, in water depths of 648 meters in the Marlim field Production Concession. The discovery was the result of the drilling of the exploratory prospect known as Brava, performed by means of well 6-MRL-199D-RJS, located 170 km away from the city of Macaé (state of Rio de Janeiro).

The accumulation discovered in pre-salt carbonatic reservoirs of the Aptian age, is nestled at a depth of 4,460 meters. Drilling was made to a total depth of about 5,000 meters to reach the reservoir, of which 1,000 meters of salt. Preliminary estimates indicate potential recoverable volumes at about 380 million barrels of oil equivalent there. Tests will be made to assess the productivity of these reservoirs.

The discovery is located in the area near the installed infrastructure in the Marlim and Voador fields, and the discovery well is located 4.5 km from the platform P-27, a fact that should not only facilitate field development, but also can reduce investments.

This accumulation will be the object of an Assessment Plan to be submitted to the National Petroleum Agency (ANP) soon.

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