The Petrobras-led Libra consortium has said that the first extension well in the Libra area, known as 3-BRSA-1255-RJS (3-RJS-731), has proven the discovery of high-quality oil in the northwest portion of the structure.
The well, informally known as NW1, is located in the pre-salt of Santos Basin, at about 170-kilometres off the coast of the state of Rio de Janeiro and approximately 4-kilometres southeast of the discovery well, 2-ANP-2A-RJS.
The oil-bearing interval was observed by means of fluid profiles and samples, which will subsequently be characterized through laboratory analysis. The well is still being drilled, currently at a depth of 5,326 meters, and drilling will continue until 5,850 meters.
The consortium will continue with the operations to complete the well drilling plan until the planned depth is hit, to verify the extension of the new discovery, and to characterize the conditions of the reservoirs found.
The Libra consortium is composed of Petrobras (operator, with a 40% stake), Shell (20%), Total (20%), CNPC (10%) and CNOOC (10%), and the contract manager is Pré-Sal Petróleo S.A. (PPSA).
Libra was the first area auctioned by Brazil’s Oil, Natural Gas and Bio-fuels Agency (ANP) under the production sharing regime.
The well is the first drilled by the consortium, which won the right to explore and develop the area. An estimated eight to 12 billion recoverable barrels of petroleum are believed to be contained in the area.