Woodside has awarded Subsea Integration Alliance an EPCI contract for Phase 1 of the deepwater Sangomar field development off Senegal. The work scope covers engineering, procurement, construction, transportation and installation of the SURF system and associated subsea production systems.
Located about 100 km (62 mi) south of Dakar, the Sangomar development will include 23 wells, 107 km (66.5 mi) of rigid flowlines, 28 km (17.4 mi) of flexible risers and jumpers, and 45 km (28 mi) of umbilicals in water depths ranging from 700-1,400 m (2,296-4,593 ft).
OneSubsea will supply 23 wellhead systems, 11 subsea production trees, 10 water injection trees, two gas injection trees, topsides controls, intervention tools, and life-of-field support.
From 2021 to 2023, Subsea 7 will perform offshore activities using various reel-lay, flex-lay and light construction vessels.
The Subsea Integration Alliance team established during the front-end engineering design phase will now transition into the full EPCI phase based at Subsea 7’s Global Projects Centre in Sutton, south of London. This center and another in Suresnes, France, will manage SURF engineering.
Phase 1 is targeting around 231 MMbbl of oil. Production is expected to start in early 2023.
Woodside’s partners are Cairn Energy subsidiary Capricorn Senegal Ltd., FAR, and Petrosen.
Aker Solutions, Subsea 7 book Ærfugl Phase 2 roles
Aker BP has awarded two of the main contracts for Phase 2 of the Ærfugl-Skarv subsea tieback 210 km (130 mi) west of Sandnessjøen in the Norwegian Sea.
Aker Solutions will supply the wellheads, lightweight vertical subsea trees, satellite structures, controls, a tie-in module and roughly 30 km (18.6 mi) of umbilicals under its NOK700-million ($77-million) order.
The package will include the company’s Vectus next generation subsea control system, said to offer greater data and power capabilities.
Manufacturing and engineering divisions in Norway, the UK, India, Malaysia, and Brazil will work on the order, with the subsea structures due to be delivered in 2020.
Subsea 7 received an EPCI contract to supply an electrically heat traced flowline running 13.5 km (8.4 mi) from the subsea location to the Skarv infrastructure. It will handle project management and engineering in Stavanger, and fabrication of the flowline system at its spoolbase in Vigra, Norway. Offshore operations will follow in 2020 and 2021.
Phase 1 of Ærfugl involves drilling three wells on the southern part of the field, with three more added in the northern section under Phase 2. All production will be connected to the Skarv FPSO.
Chevron lets St. Malo installation contract
Chevron U.S.A. Inc. has contracted Subsea 7 for installation services at the St. Malo field in Walker Ridge block 678 in the Gulf of Mexico. The St. Malo field is about 402 km (250 mi) south of New Orleans.
The work scope includes project management, engineering, procurement, construction, and installation of the multi-phase pump system, a 23-km (14-mi) water injection flowline system, inclusive of a Swagelining polymer lined flowline, and the water injection control system.
Project management and engineering is under way at the company’s offices in Houston. Fabrication of the water injection flowline and riser will take place at its spoolbase in Ingleside, Texas, with offshore operations occurring in 2021.
Craig Broussard, vice president for Subsea 7 US, said, the contact “combines the utilization of our newest pipelay vessel, the Seven Vega, along with Subsea 7’s proven project execution capabilities and Swagelining’s polymer lining technology.
“In addition, the combination of the SURF scope for Subsea 7 and ongoing subsea equipment delivery by OneSubsea, will allow the Subsea Integration Alliance to work in collaboration with Chevron to unlock the value of an integrated approach to project optimization.” •
