The high productivity of the presalt carbonate reservoirs in the Carcará area offshore Brazil was confirmed through two formation tests completed on the 3-SPS-105 well, Petrobras said Dec. 23.

The well, known as Carcará Norte, is in the Carcará discovery evaluation plan area, 4.6 km north of the 4-SPS-86B discovery well, in 2,070 m of water. Its final depth inside basalt rock is 6,338 m.

Estimates indicate that the well’s output potential could be as high as the most prolific wells of the Santos Basin’s presalt layer, with good quality 31 degree API oil. It is a single oil accumulation, Petrobras added.

Petrobras, the operator, has 66% interest in the consortium. Partners are Petrogal Brasil with 14%, Barra Energia do Brasil Petróleo e Gás with 10% and Queiroz Galvão Exploração e Produção SA with 10%.

Completion is expected in March 2018, and the consortium will continue implementing the evaluation plan, which was approved by the National Oil, Natural Gas and Biofuels Agency.

Offshore