Petróleo Brasileiro S.A. – Petrobras announces the discovery of natural gas accumulation at Orca – 1 exploratory well, in Tayrona Block, at Colombian Caribbean deep waters, 40 km off the coast of La Guajira. Petrobras is the operator and holds 40% interest, in partnership with Ecopetrol (30%) and Repsol (30%).The well drilling ended in September, reaching 4.240 meters and 674 meters of water depth. The natural gas accumulation was confirmed at 3.600 meters and represents the first discovery in the history of exploratory research at Colombian Caribbean deep waters. Petrobras will carry on the scheduled operations, in order to evaluate such discovery. Petrobras, in partnership with Ecopetrol, was the pioneer at the Tayrona block when, in 2004, the first agreement granted by the Colombia ́s National Hydrocarbons Agency – ANH – for deep waters exploration at Colombian Caribbean was celebrated.