Development

Skarv is a field in the northern part of the Norwegian Sea, 35 kilometres southwest of the Norne field. The water depth is 350-450 metres. Skarv was discovered in 1998, and the plan for development and operation (PDO) was approved in 2007. The plan also included the development of the Idun deposit. The production started in 2013. The field has been developed further with the development of the Ærfugl and Gråsel deposits, which came into production in 2020 and 2021, respectively. The development concept includes five subsea templates tied-back to a production, storage and offloading vessel (FPSO).

Reservoir

Skarv produces gas and oil from Lower and Middle Jurassic sandstone in the Tilje, Ile and Garn Formations. The Garn Formation has good reservoir quality, while the Tilje Formation has relatively poor quality. The reservoirs are divided into several fault segments and are at depths of 3300-3700 metres. The reservoir in Ærfugl contains gas and condensate in sandstone of Late Cretaceous age in the Lysing Formation. It is at a depth of 2800 metres and has good quality. The Gråsel reservoir contains gas and oil in sandstone of Late Cretaceous age in the Lange Formation.

Recovery strategy

The field is produced with pressure support by gas injection and gas lift.

Transport

The oil is offloaded to shuttle tankers, while the gas is transported to the Kårstø terminal in an 80-kilometre pipeline connected to the Åsgard Transport System (ÅTS).

Status

The oil production from Skarv is declining, and gas injection is important for oil recovery. Gas blowdown has started in 2022 from parts of the reservoir and will continuously be evaluated. Work is ongoing to evaluate the potential of infill wells and prospects in the area.