The most comprehensive seismic survey of the North West Shelf using the very latest high technology – that’s the job that was undertaken by the WesternGeco Vespucci on behalf of the Woodside-operated North West Shelf Project, which was completed in May 2014.
The Fortuna survey took more than five months to complete, acquiring more than 4,000 sq km of seismic data – an area roughly twice the size of Mauritius. It is hoped that the survey will point to new reserves of oil and gas that could prolong the life of the valuable North West Shelf Project acreage for years to come.
Using new marine seismic technology devised by Schlumberger (parent company to WesternGeco), the Vespucci deployed a state-of-the-art towed streamer array made up of 12 streamers, each 7,000 m long, spaced at 75 m and towed at a depth of 25 m.
As well as using conventional hydrophones to measure pressure waves, the streamers also have embedded multi-sensor accelerometers measuring the vertical Fortuna and cross-line gradients (y and z datasets).
This technology provides the ability to capture isometrically sampled records.
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