Introducing the mysterious X This depth slice was created using single azimuth data with a similar acquisition set up in the Barents Sea. The details and large velocity contrasts captured in the velocity model allow accurate imaging of the subsurface without distortion effects caused by the shallow heterogeneous overburden © PGS/TGS

Introducing the mysterious X

With the introduction of GeoStreamer X, PGS challenges ocean bottom surveying with rapid turnaround time and substantially lower cost.

In the search for continued petroleum resources on the NCS and in other regions around the world, geologists and geophysicists working with imaging of the subsurface agree that we need better data.

“Ocean Bottom Seismic (OBS) is one option but it’s not necessarily the optimal solution,” claims Berit Osnes, Executive Vice President of New Ventures in PGS.

The attraction of OBS is obvious. By placing receivers on the seafloor and decoupling the source from these receivers, it is possible to record rich azimuth data, potentially giving superior illumination of geologically complex exploration targets. On the downside, the data is costly, and slow to acquire and process.

With no OBS-crews in their extensive fleet, PGS was convinced that they could offer a better overall solution with advanced towed-streamer technology, including the widely celebrated GeoStreamer.

“The answer was in fact simply the next step, as it incorporates all the acquisition solutions applied on our groundbreaking 2018 survey in the Barents Sea (GEO 03/2019, page 2), that is a joint project with TGS, combined with multi-azimuth acquisition. Wide-towed sources as well as longer and denser streamer spreads are enabled by our high-capacity Ramform vessels,” Osnes says.

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Berit Osnes, EVP New Ventures, PGS
Photo: PGS