Development

Alvheim is a field in the central part of the North Sea, ten kilometres west of the Heimdal field and near the border to the UK sector. The field includes the six discoveries Kameleon, Boa, Kneler, Viper, Kobra and Gekko. Boa lies partly in the UK sector. The water depth is 120-130 metres. Alvheim was discovered in 1998, and the plan for development and operation (PDO) was approved in 2004. The field is developed with subsea wells tied to a production, storage and offloading vessel, Alvheim FPSO. The production started in 2008. The Vilje, Volund, Bøyla and Skogul fields are tied-back to the Alvheim FPSO. In 2022, a PDO for the development of the accumulations Kobra East and Gekko was approved.

Reservoir

Alvheim produces oil and gas from Paleocene sandstone in the Hermod and Heimdal Formations. The reservoirs are located in submarine fan deposits and injectites, mostly at depths of 2100-2200 metres. The reservoir quality is good.

Recovery strategy

The field is produced by natural water drive from an underlying aquifer.

Transport

The oil is stabilised and stored on the Alvheim FPSO before it is exported by tankers. Processed rich gas is transported by pipeline from Alvheim to the Scottish Area Gas Evacuation (SAGE) pipeline on the UK continental shelf.

Status

Due to greater in-place volumes and longer infill wells, Alvheim has had a significant increase in the estimated recoverable volumes of oil and gas since the PDO. Kobra East and Gekko have been put into production in 2023, and will contribute to increased production levels at Alvheim. Tie-back of the Tyrving field to the Alvheim FPSO is under development.