Project Profile
Location: 250 km (160 mi) west of Stavanger, North Sea, Norway
Production: 300,000 boepd, 6 million Sm3 of gas p/d and 14,000 Sm3 condensate p/d
Start-up Year: 1 October 1993
The Sleipner area embraces the Sleipner East and Sleipner West gas and condensate fields. The Sleipner East came on stream in October 1993, while the Sleipner West came on stream in August 1996. Gungne and Loke are satellites to Sleipner East and Alpha North is a satellite to Sleipner West. During the last years, Sleipner has strengthened its position as the second largest gas machine in the North Sea next to the Troll field. Sleipner stands out as a modern and robust gas hub thanks to frequent upgradings, tie-ins of other fields such as Sigyn and Volve and the connection to the Troll and Ormen Lange fields. Development of Sleipner East became one of the most dramatic projects in Norwegian oil history on 23 August 1991, when the concrete gravity base structure for Sleipner A sank. A design error sent this unit to the bottom of the Gands Fjord outside Stavanger in more than 200 metres of water, shortly before it was due to be mated with the topsides. In 1985, the UK government rejected a sales contract negotiated by Statoil with British Gas on behalf of the sellers.
However, Statoil succeeded the following year in incorporating gas from the Sleipner fields in the Troll gas sales agreements. This made it possible to start deliveries under these contracts in 1993 – three years before Troll Gas could come on stream. The production is about 300,000 barrels of oil equivalent per day, 6 million Sm3 of gas per day and 14,000 Sm3 condensate per day (1.8 billion barrels (boe) in total production). Sleipner has been injected and stored more than 10 million tons of CO2 into the Utsira reservoir. The amount is more than the total Norwegian fleet emits in two years. The field stands for approx. 10% of Statoil's total income each year. Statoil is the operator of the field.
The Sleipner East gas field is located on Block 15/9 in the North Sea, and is situated in a water depth of 269 feet (82 metres). Statoil operates the field and owns 59.6% interest; ExxonMobil Norge owns 30.4%; and Total E&P Norge owns the remaining 10%.
Located on Blocks 15/6 and 15/9, the Sleipner West field is the largest gas field in the Sleipner area, and is situated in a water depth of 361 feet (110 metres).
Operators:
Statoil: Operator with 59.6% interest in Sleipner East and 58.34% interest in Sleipner West
ExxonMobil Norge: 30.4% interest in Sleipner East and 32.23% interest in Sleipner West
KUFPEC: 10% interest in Sleipner East and 9.41% interest in Sleipner West
Contractors:
Archer: Drilling and maintenance contract (April, 2018)
Aker Solutions: A four-year frame agreement from Statoil for delivering wireline tractor services. Also in March 2016 - engineering work to enable a tie-in of the Utgard gas and condensate field to the Sleipner facilities in the North Sea.
- A contract for preliminary engineering work to enable the tie-in. (April, 2016)
- EPCIC services to enable a tie-in of the Utgard gas. (September, 2016)
ALTUS Intervention: Power Mechanical Services
Bilfinger Industrier Norge: Provide insulation, scaffolding, and painting services
Baker Hughes: Provide integrated drilling services
Fabricom: Maintenance and modifications work
DeepWell: Contract to provide wireline services on well intervention work for the platform and the semi-submersible drilling rig COSL Pioneer
Wood Group: Awarded the detailed design scope of the subsea tie-back from the Utgard gas and condensate field to the Sleipner facilities.
- The Utgard tie-back consists of a 21km long pipe-in-pipe production pipeline from the 4-slot template at Utgard to the Sleipner T platform and an integrated service umbilical (ISU) from the Sleipner A. (August, 2016)