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    Shearwater to Shoot Brazil's Biggest OBN Seismic Survey

Summary

The survey will take place at the Tupi and Iracema projects in the country's offshore Santos basin.

by: Joe Murphy

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Shearwater to Shoot Brazil's Biggest OBN Seismic Survey

Offshore seismic data acquisition firm Shearwater GeoServices has secured a contract from Brazil's Petrobras for a deepwater ocean bottom node (OBN) seismic survey for the Tupi and Iracema projects in the country's prolific pre-salt Santos basin, it said on February 17.

"This will be the largest OBN seismic survey in Brazil, at the Tupi field, considered Brazil’s first super-giant oilfield and is a base survey for potential future 4-D surveys," Shearwater said in a statement.

The survey will begin in the third quarter and run for around nine months. It will cover 2,882-kmand will involve the use of deepwater OBNs deployed by ROV and Shearwater’s 3x3 nine-string triple source. Shearwater will use the SW Diamond vessel and one additional vessel to undertake the work.

The Brazilian gas market is opening up to competition and the state monopolist Petrobras has sold its stakes in two major onshore pipelines as well as numerous upstream stakes. But the pre-salt reserves need more transport capacity to reach shore.