Rio de Janeiro, August 7th, 2013 – Petróleo Brasileiro S.A.

– Petrobras announces it has confirmed the presence of oil in well 3-SPS-101 (3-BRSA-1179-SPS), in the Carioca Discovery Evaluation Plan area, block BM-S-9, Santos Basin pre-salt.

The well, informally referred to as Iguaçu Mirim, is located 303 km off the coast of the state of São Paulo, 34 km to the south of discovery well (1-SPS-50 - Carioca) and 9 km south of Iguaçu well (4-BRSA-709-SPS), at a water depth of 2,158m.

This new discovery was confirmed through oil samples of approximately 20° API, taken via cable test from pre-salt carbonate reservoirs starting at a depth of 4,850 meters.

The consortium of BM-S-9 is operated by Petrobras (45%) in partnership with BG E&P Brasil (30%) and Repsol Sinopec Brasil (25%).

The deadline for the Declaration of Commerciality is December 31, 2013.

Sincerely,