Development

Johan Castberg is a field in the Barents Sea, 100 kilometres northwest of the Snøhvit field. The water depth is 370 metres. Johan Castberg consists of the three discoveries Skrugard, Havis and Drivis, proven between 2011 and 2013. The plan for development and operation (PDO) was approved in 2018. The discoveries were developed together, and the development concept is a production, storage and offloading vessel (FPSO) with additional subsea templates including 18 horizontal production wells and 12 injection wells.

Reservoir

The reservoirs contain oil with gas caps in three separate sandstone deposits of Late Triassic to Middle Jurassic age in the Tubåen, Nordmela and Stø Formations. They are at depths of 1250-1900 metres. Reservoir properties in the Tubåen and Stø Formations are generally good; the Nordmela Formation is more heterogeneous with several lateral barriers.

Recovery strategy

The field is produced by pressure support from gas and water injection.

Transport

The oil is offloaded to shuttle tankers and transported to the market.

Status

The production started in March 2025.