PGS has completed acquisition of the GeoStreamer X Viking Graben survey in the North Sea and will release the first data due in Q1 2020.
PGS has completed acquisition of the GeoStreamer X Viking Graben survey in the North Sea and will release the first data due in Q1 2020.
The prefunded GeoStreamer X multi-client multi-azimuth project, which used high-fidelity multisensor broadband technology and an efficient wide-towed source on the Viking Graben, started in September and was completed on 31 October.
‘This survey, carried out using one Ramform vessel, has proven beyond doubt that GeoStreamer X is a significantly faster method of achieving advanced offset- and azimuth-rich data than node-based exploration,’ said Gunhild Myhr, PGS VP new ventures Europe.
Despite challenging weather, all key targets were covered by two additional azimuths and will be processed together with a base GeoStreamer PURE data set over the survey area.
PGS used a wide-tow triple source with 225 m separation between outer source arrays — the widest ever source separation towed by a single streamer vessel on a commercial project. The extra-wide source solution significantly improved near-offset sampling, by recording the near-incidence angle information that will facilitate accurate AVO analysis of shallow targets. The wide tow sources also contributed to increased survey efficiency.
The vessel Ramform Vanguard towed a streamer configuration of 12x85 m spread with ten streamers of 6 km and two 10 km streamers to record longer offsets for even more accurate, FWI-driven velocity model-building.
The GeoStreamer spread was towed in the depth range of 25m to 30m to acquire true broadband data with an optimal signal-to-noise ratio for high-resolution imaging and velocity model building.
