Petroleum Geo-Services (PGS) has successfully completed the second GeoStreamer X seismic survey in the Viking Graben (North Sea), on time and covering all targets.

PGS expects that fast track data will be ready in the fourth quarter of 2020 and final PSDM results will be available Q2 2021.

The GeoStreamer X Viking Graben 2020 extension project applied PGS’s latest technology innovations for advanced offset- and azimuth-rich data. The project builds on the successful 2019 GeoStreamer X pilot project in the same area.

Gunhild Myhr, VP New Ventures at PGS, detailed that the Ramform Vanguard vessel managed its dense streamer spread in combination with record-wide sources, acquiring a survey that will deliver a dataset of ‘excellent quality, with high resolution, optimal near-offset distribution for shallow imaging, improved demultiple, and AVO’.

“The Norwegian exploration industry needs improved data quality in this area, to address a number of challenges. PGS has addressed this with a novel and efficient multi-azimuth towed-streamer solution and bespoke imaging workflow,” Myhr commented.

GeoStreamer X is an advanced marine seismic strategy for acquiring upgraded data in any geological regime.

PGS outlines that it solves known illumination challenges on the Viking Graben associated with sand injectites, such as injectites cemented with anomalously high velocities (so-called ‘v-brights’), and injectites with reservoir potential that definitely require better illumination.

“On this year’s Viking Graben survey the ultra-near offsets were achieved with the wide-tow sources yet, achieving a record of 250 m between outer sources. This efficient solution is the widest ever towed from a single vessel,” the firm said.

“The dense streamer spread included several long streamer tails that will provide the needed offset for optimal FWI at depth. Early-out data will be ready in Q4 and final depth imaging data will be available Q2 2021,” PGS concluded.