Home / News / Petrobras starts first oil production in pre-salt layer

 Petrobras has kicked off production in Brazil’s new oil province, the pre-salt layer, in the Jubarte field in the Campos Basin, off the southern coast of Espírito Santo. The company hopes to obtain knowledge from this production that will help development of pre-salt reserves in Espírito Santo and other places off the Brazilian coast.

To adjust to the light pre-salt oil (30° API), changes had to be made to the platform’s processing plant that, with the completion of well 1-ESS-103A and its interconnection to FPSO JK (P-34), involved investments of around R$50 million.

Production begins with a long-duration test (LDT) to observe how pre-salt oil behaves, both in the reservoir and in the platform’s process plant. The LDT is expected to last six months to a year.

Petrobras starts first oil production in pre-salt layer

A ceremony was held aboard JK (P-34), attended by Brazilian president Luiz Inácio Lula da Silva and Petrobras president and CEO José Sergio Gabrielli de Azevedo.

FPSO JK (P-34) has been producing oil in the Jubarte field since December 2006 in a reservoir located above the salt layer. The platform is only 2.5 km away from the 1-ESS-103A exploratory well, which discovered the oil in the pre-salt, below the Jubarte Field, 1,375 m below the water line.

In the past couple of years, Petrobras has invested approximately R$1.7 billion in drilling 15 wells that reached pre-salt layers. Eight of them have already been tested and revealed the presence of light oil and associated natural gas. They are still under assessment.

To reach the pre-salt layers, at depths of 5,000 m to 7,000 m, Petrobras developed new drilling projects that have crossed upwards of 2,000 m of salt. Data obtained from these wells allowed the determination that pre-salt rock covers an 800 km-by-200 km area that ranges from Espírito Santo to Santa Catarina, at water depths of 1,000 m to 3,000 m.

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