Petrobras (NYSE: PBR) said Feb. 10 that the Libra Consortium drilled and tested the first appraisal well in the Libra area.

The 3-BRSA-1255-RJS (3-RJS-731) well is known as NW1. It is in the northwest portion of the Libra block in the Santos Basin presalt, about 4 km southeast of the discovery well 2-ANP-2A-RJS, and 185 km off the Rio de Janeiro coast, the company said.

Drilling results confirmed a roughly-290 m oil column and high quality reservoirs. Two production tests carried out in two different zones confirmed the productivity and quality of these reservoirs’ 27-degree API oil , the company said.

Petrobras is the operator of Libra Consortium with 40% interest. Shell has 20%; Total SA (NYSE: TOT) has 20%; China’s CNPC and CNOOC each have 10%. Brazil’s state-owned Pre-Sal Petroleo SA is also a member.