PGS has announced a world record for quantity of towed streamers totalling 144.45km, set during an acquisition for Lundin Energy in the Barents Sea.
This occurred in late May when PGS mobilized for a simultaneous node and streamer acquisition survey which was completed in mid-August, during which PGS set several acquisition records.
PGS said meeting the technology requirements was essential to winning the contract and the company had provided an “innovative solution, including an ultra-wide hexa-source configuration towed behind the 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 3 812km² in a tandem source-over-streamer operation. The GeoStreamer spread towed behind the Ramform Hyperion comprised of 18 streamers with 75-meter separation and 8 025 meters length – setting a world-record for quantity of towed streamers totalling 144.45 kilometres.
The Sanco Swift’s ultra-wide hexa-source was also a record breaker, at 437.5 meters this is the widest source spread ever towed.
A substantial portion of the survey area was also covered with a sparse grid of approximately 1 000 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 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 in PGS.
• World record: Largest streamer count amounting to 144.45 kilometres of streamer deployed.
• World record: Widest towed 437.5 meters hexa-source.