In late-May PGS mobilized for asimultaneous node and streamer acquisition contractfor Lundin Energy Norway (and partners in PL1083) in the Barents Sea. The project was completedmid-August andduring the surveyPGS set several acquisition records.
Meeting the technology requirements was essential to winning the contract. PGS 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.
Ramform Hyperion towing 18 x 75m x 8 025m GeoStreamer spread.
The survey area covered 3 812 square kilometers 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, 144.45 kilometers. 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.
Sanco Swift towing 437.5 meters wide hexa-source.
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.
“Thesuccessful management of thisintegratedtechnology projectin a complex offshoresetting,including the most advancedin-sea equipment configurationto date,is further proof of PGS’ operationalcapabilityand that this capability translates smoothly from streamer to node operations”saysRob Adams, EVP Operations in PGS.
- World record: Largest streamer count amounting to 144.45 kilometers of streamer deployed.
- World record: Widest towed 437.5 meters hexa-source.
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