PGS has completed a survey for Lundin Energy in the Barents Sea that broke records for the quantity of streamers and the widest source spread.
PGS has completed a survey for Lundin Energy in the Barents Sea that broke records for the quantity of streamers and the widest source spread.
In late May PGS mobilized for a simultaneous node and streamer acquisition, including an ultra-wide hexa-source configuration towed behind the vessel Sanco Swift, on top of a massive, high-density 3D GeoStreamer spread towed behind the Ramform Hyperion, and a unique node-deployment solution.
The survey area covered 3812 km2 in a tandem source-over-streamer operation. The GeoStreamer spread towed behind the Ramform Hyperion comprised of 18 streamers with 75-m separation and 8025 m length, setting a world-record for quantity of towed streamers, 144.45 km. The Sanco Swift’s ultra-wide hexa-source was also a record breaker; at 437.5 m this is the widest source spread ever towed.
A substantial portion of the survey area was also covered with a sparse grid of approx. 1000 ocean bottom nodes, the first survey to use automated free-dropped nodes. To deploy the nodes onto the seabed, PGS designed a conveyor belt system, installed on a support vessel, which it claimed provided greater efficiency and lower HSE exposure than other node deployment solutions. The nodes were safely retrieved from the seafloor using an ROV with 100% node recovery.
‘The successful management of this integrated technology project in a complex offshore setting, including the most advanced in-sea equipment configuration to date, is further proof of PGS’ operational capability and that this capability translates smoothly from streamer to node operations,’ said Rob Adams, EVP operations at PGS.
