SLEIPNER ØST

Discovery year
1981
Wellbore
Status
Producing
Business unit

Operator:

Equinor Energy AS

Area:

North Sea

Production start:

24.08.1993

Historical investments per 31.12.2017:

28 765 MILL NOK (nominal)

Future investments from 2018:

838 MILL NOK (real 2018 NOK)

PRODUCTION FROM THE FIELD

Source: The Norwegian Petroleum Directorate

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PRODUCTION FROM THE FIELD

Development

Sleipner Øst is a field in the central part of the North Sea. The water depth is 82 metres. Sleipner Øst was discovered in 1981, and the plan for development and operation (PDO) was approved in 1986. The field has been developed with Sleipner A, an integrated processing, drilling and accommodation facility with a concrete base structure. The development includes the Sleipner R riser facility, which connects Sleipner A to the pipelines for gas transport, and the Sleipner FL flare stack. Production started in 1993. A PDO for Loke Heimdal was approved in 1991 and for Loke Triassic in 1995. Two subsea templates were installed, one for production from the northern part of Sleipner Øst and one for production from the Loke deposit. The Alpha Nord segment was developed in 2004 with a subsea template tied-back to the Sleipner T processing facility through an 18-kilometre pipeline. CO2 is removed from the well stream at Sleipner T and injected into the Utsira Formation via a dedicated well at Sleipner A. The Sigyn, Gungne, Gudrun and Gina Krog fields are tied-back to Sleipner A.

Reservoir

Sleipner Øst produces gas and condensate. The Sleipner Øst and Loke reservoirs are in Paleocene turbidite sandstone in the Ty Formation, Middle Jurassic shallow marine sandstone in the Hugin Formation and in continental sandstone in the Triasssic Skagerrak Formation. In addition, gas has been proven in the Heimdal Formation, overlying the Ty Formation. The Ty Formation has good reservoir quality, while the Skagerrak Formation generally has poorer reservoir quality than both Ty and Hugin Formations. The reservoirs are at a depth of 2,300 metres.

Recovery

The Hugin Formation reservoir is produced by pressure depletion. The reservoir in the Ty Formation was produced by dry gas recycling until 2005, and production from the Ty reservoir stopped in 2012. To optimise production, wells are produced at a reduced inlet pressure.

Transport

Sales gas is exported from the Sleipner A facility via Gassled (Area D) to market. Unstable condensate is transported to the Kårstø terminal by pipeline.

Status

Sleipner Øst is in the late tail phase. Measures are taken to decrease the decline rate and increase the reserves. CO2 injection in the Hugin reservoir is being evaluated to increase recovery. Power from shore is being evaluated to reduce the fuel gas volumes and increase the export volumes. The Utgard field will be tied-back to the Sleipner T process facility in 2019.

ACCRUED INVESTMENTS IN NOMINAL NOK

Source: The Norwegian Petroleum Directorate

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ACCRUED INVESTMENTS IN NOMINAL NOK

NPD's CURRENT RESOURCE ESTIMATES

All numbers in mill. Sm3 o.e.

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NPD's CURRENT RESOURCE ESTIMATES – All numbers in mill. Sm3 o.e.
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OWNERS

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OWNERS

DISCOVERIES INCLUDED IN THE FIELD

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