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