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    PGS begins 3D survey offshore Angola

    Projects and Operations // January 26, 2012

    Ramform Valiant, a seismic vessel owned and operated by Petroleum Geo-Services (PGS), recently began acquisition of more than 26,000km˛ of GeoStreamer data in five blocks in the Kwanza/Benguela basins offhsore Angola. The size of the survey area corresponds to an area slightly larger than Massachusetts or Wales.

    Following the block awards made on December 20th, BP, Total and Statoil have been made operators of blocks 24, 25, 38, 39 and 40. Sonangol is a partner in all of the blocks. All four oil companies have committed to funding the survey.

    With early access to 3D seismic data based on advanced seismic technology the operators will benefit from clearer images and more time to plan the exploration wells that they are committed to drill within the next five years.

    PGS, in association with Sonangol, has a long history of investing in Angola. The company said it will work closely with Sonangol to ensure that the project not only delivers data and time savings to the operators “but also improves the collective understanding of the basin geology.”

    PGS already has 2D GeoStreamer data over the area, which it acquired in 2010, and good quality conventional 3D datasets over blocks 24 and 25 that it will re-process. Together these datasets will enable PGS to construct the best possible velocity model for processing of the new 3D GeoStreamer data.

    In February, PGS Apollo is due to join Ramform Valiant. The acquisition will continue using both vessels until the fourth quarter of 2012. PGS teams will start processing data in March, utilizing the latest depth imaging technology and building on their experience of illuminating pre-salt targets in Angola. Together, the two vessels will operate 20 vessel months on this project.

    The pre-salt basins offshore Angola have a clear geological link to similar basins offshore Brazil. Recent advances in tectonic reconstruction point to parallels with the prolific Santos and Campos areas offshore Brazil, and PGS will use its extensive multi-client library on both sides of the Atlantic to take a closer look at these.

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