Development

Vigdis is a field in the Tampen area in the northern part of the North Sea, between the Snorre, Statfjord and Gullfaks fields. The water depth is 280 metres. Vigdis was discovered in 1986, and the plan for development and operation (PDO) was approved in 1994. Vigdis comprises four structures: Vigdis Brent, Borg Nordvest, Vigdis Øst-Nordøst and Lomre. The Vigdis Brent structure includes several substructures. The field has been developed with seven subsea templates and two satellite wells connected to the Snorre A facility. The production started in 1997. Oil from Vigdis is processed in a dedicated processing module on Snorre A. Injection water is supplied from Snorre A and Statfjord C. A PDO for Vigdis Extension, including the discovery 34/7-23 S and adjoining deposits, was approved in 2002. The PDO for Vigdis Nordøst was approved in 2011. A PDO exemption was granted for Lomre in 2022.

Reservoir

Vigdis produces oil from sandstone in several structures. The reservoirs in Vigdis Brent and Lomre are in the Middle Jurassic Brent Group, while the reservoirs in Vigdis Øst-Nordøst are in the Upper Triassic and Lower Jurassic Statfjord Group. The Borg Nordvest reservoir is in Upper Jurassic intra-Draupne sandstone. The reservoirs are at depths of 2200-2600 metres and have generally good quality.

Recovery strategy

The field is produced by pressure support using water injection. Some of the reservoirs are affected by pressure depletion on the Statfjord field.

Transport

The well stream from Vigdis is routed to Snorre A through two flowlines. Stabilised oil is transported by pipeline from Snorre A to Gullfaks A for storage and export. All produced gas from Vigdis is reinjected into the Snorre reservoir.

Status

The strategy on Vigdis is to maintain reservoir pressure by water injection, while maximising production capacity and regularity. There are no unused slots, and new wells must therefore be drilled as sidetracks from existing wells. New well targets are being matured, and drilling of new wells is planned for 2025. In addition, new 4D seismic data will be acquired. The production from the Lomre structure is planned to start in 2025.