Fourth Sergipe-Alagoas ultradeepwater well finds oil

Petroleo Brasileiro SA (Petrobras) has discovered oil at a fourth 2012 ultradeepwater discovery in the Sergipe-Alagoas basin offshore Brazil in an area more than 900 miles northeast of most of the company’s presalt discoveries in the Santos basin.

The 1-SES-172 (1-BRSA-1108-SES) well, called Muriu, encountered light oil in 67 m of excellent quality reservoirs of the Calumbi formation, which varies in age from Upper Cretaceous to Tertiary in parts of the basin.

The well went to 5,347 m in 2,583 m of water 85 km offshore Aracaju on the SEAL-M-424 block of Petrobras’s exclusively held BM-SEAL-10 concession, the third concession on which the company has discovered ultradeepwater hydrocarbons.

The other three discoveries, which Petrobras made between August and October 2012, are 1-SES-168 (Moita Bonita), 3-SES-165 (Barra), and 1-SES-167 (Farfan).

Petrobras said it confirmed the Muriu discovery through log data analysis, pressure data analysis, and fluid sampling. The company plans to finish logging and gather rock and fluid data to assess strategy and characterize the reservoir. Later it will submit a discovery assessment plan to Brazil’s National Petroleum Agency.

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