Gjøa

Gjøa was discovered in 1989, and the reservoir is comprised of the Upper Jurassic Viking Group, the middle Jurassic Brent and Dunlin groups. The field has been producing since 2010.

Licence Name

PL 153

Location

35/9 - 36/7

Ownership
12.000 %
Operator
Neptune Energy Norge AS
Status
In production

Development

Gjøa is a field in the northern part of the North Sea, 50 kilometres northeast of the Troll field. The water depth in the area is 360 metres. Gjøa was discovered in 1989, and the plan for development and operation (PDO) was approved in 2007. The field is developed with four subsea templates and one satellite well tied-back to a semi-submersible production and processing facility. The Gjøa facilities are partly supplied with power from shore. The Vega and Vega Sør fields are tied-back to Gjøa for processing and further export. Production started in 2010.

Reservoir

The reservoir contains gas above a relatively thin oil zone in sandstone of Jurassic age in the Dunlin, Brent and Viking Groups. The field comprises several tilted fault segments with partly uncertain communication and variable reservoir quality. The reservoir depth is 2,200 metres.

Recovery

The field is produced by pressure depletion. In the southern segments, oil production was prioritised in the first years. Gas blow-down, production of the gas cap, started in 2015. Low pressure production was implemented in 2017.

Transport

Stabilised oil is exported by pipeline connected to Troll Oil Pipeline II, for further transport to the Mongstad terminal. Rich gas is exported via the Far North Liquids and Associated Gas System (FLAGS) on the UK continental shelf, for further processing at the St Fergus terminal in the UK.

Status

Gjøa is being considered as host for additional resources in the area. Possibilities to increase reserves in the licence are being evaluated.

Discovery Year

1989

Production start year

2007

Total investment

29574 mill NOK

Operational Wellbores

21

Investment

(Mill. NOK)
  • Investment

Production

(Mill Sm³)
  • Oil
  • Gas
  • Condensate
  • NGL

Investment

 

38 %

This year
Last year

Production

$ 2,500,000,000

20.1 %

This year
Previous year

Shares

Operator

Neptune Energy Norge AS

  • Neptune Energy Norge AS
  • Petoro AS
  • Wintershall Norge As
  • OKEA ASA
  • DEA Norge As