Project Profile
Value: US$1.7 billion
Location: Block 25/11, 185 kilometres west of Haugesund
Start-up Year: 2014
Oil Reserves: 754 MMbbl
Production: 110,000 b/d
Water Depth: 127 metres
The oil field Grane in the North Sea has been developed with an integrated accommodation, processing and drilling platform with a fixed steel frame construction resting on the sea bed. The platform is located around 185 kilometres west of Haugesund, where sea depth is 127 metres, in the North Sea.The field was discovered by Hydro in 1991, and came on stream on 23 September 2003. Grane is the first field on the Norwegian continental shelf to produce heavy crude oil. This oil differs from other types in that it is found in younger geological formations than what is usual on the continental shelf, namely in sandstone from the Tertiary period, deposited around 60 million years ago. The oil is transported by pipeline to the Sture terminal, where it is stored in large rock caverns in the mountainside prior to shipment to the world market. When the Grane field came on stream, its recoverable reserves were estimated to total 700 million barrels of oil. The Grane oil is transported through a 212 kilometre long pipeline to Statoil\'s Sture terminal in Øygarden, west of Bergen.
In 2000, Kvaerner Oil & Gas was awarded a US$389 million contract for construction of the production unit for the Grane platform. The company was also awarded a US$16 million for supplying pumps and pump systems for the platform. The steel jacket of the platform was constructed by Aker Verdal and the drilling module by Aker Stord. Other contractors of the platform include Heerema Marine Contractors, Europipe, Mitsui, Bredero Price, European Marine Contractors and Fabricom. Odfjell Drilling Management was awarded the drilling contract for the field in April 2001. In February 2010, Statoil extended the contract by two years to 2012. In 2003, Weatherford International was awarded a US$20 million contract for supplying single wirewrap screens and liner hangers for the field. Emerson Process Management supplied the field with wireless technology in February 2008 to monitor the well-head and heat exchanger pressures on the Grane platform. Twelve development wells, broken down into nine production and three injection wells, were drilled in March 2003. Saipem\'s Scarabeo 6 semi-submersible rig was used for drilling. Additional drilling activities included 25 platform wells drilled by Odfjell Drilling Management. A total of 31 production wells have been drilled at the field.
Operators:
Statoil: Operator with 36.67% interest
Petoro: 28.94% interest
ExxonMobil E&P Norway: 28.22% interest
ConocoPhillips Skandinavia: 6.17% interest
Contractors:
Aker Solutions: Well services
Aker Verdal: Steel jackets
Baker Hughes: Provide integrated drilling services
Bredero Price
CGG: Permanent reservoir monitoring (PRM) seismic imaging services
Emerson Process Management: Supplied wireless technology
Europipe
European Marine Contractors
Fabricom
Geospace Technologies Corp: Provide seabed seismic reservoir monitoring systems
Heerema Marine Contractors
Kvaerner: EPC contract
Mitsui
Odefjell: Drilling contract
OYO Geospace: Supply a 600 km (373-mi) long seabed seismic monitoring system
Reef Subsea: Full seismic system installation
Reinertsen: Modification of the platform’s gas processing facilities
Saipem: Semisubmersible rig
Thalassa: Provide seismic acquisition services
Weatherford: Supplying single wirewrap screens and liner hangers
Wood Group: Main contractor framework agreement worth approximately US$400 million to deliver maintenance and modification services to four Statoil installations on the Norwegian Continental Shelf (NCS). Wood Group Mustang Norway will provide this support for the Snorre A&B, Grane and Visund facilities over the term of the six-year contract, with the option of a further four-year extension. The agreement is expected to create approximately 250 jobs. (December 2015)
Beerenberg Corp AS: Long-term contracts for insulation, scaffolding and surface treatment services. The two new contract will replace the company’s existing contracts regarding NCS services. (January 2016)
ALTUS Intervention (a subsidiary of Qinterra AS): The 10-year long agreement involves provision of mechanical wireline and fishing services, as well as cased hole logging and tractor conveyance as optional services. (July, 2016)