PGS Sets Multiple Acquisition Records
In late May PGS mobilized for a simultaneous node and streamer acquisition contract for Lundin Energy Norway (and partners in PL1083) in the Barents Sea. The project was completed mid-August and during the survey PGS 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 that was towed behind the Ramform Hyperion, and a unique node-deployment solution.
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, each 8 025 meters in length – setting a world-record for the 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.
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,” says Rob 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.