en.Wedoany.com Reported - Equinor Energy AS is studying further development of resources in the Johan Sverdrup area in the North Sea, laying the groundwork for a potential Phase 4 development in the northern part of the field.

Production from the Tonjer West and East and Geitungen discoveries will be developed via subsea tiebacks to the existing Johan Sverdrup infrastructure. Tonjer is located at the northernmost end of the Geitungen terrace in the area, where oil has previously been discovered but with uncertain reserves and potential. Drilling of two appraisal wells and one sidetrack well has provided a more precise assessment of the resource base.

Preliminary combined reserve estimates for Tonjer and Geitungen are 20-30 million barrels of oil equivalent (20-30 MMboe). Further analysis of subsurface data will provide a basis for more accurate resource estimates.

Phase 4 is currently advancing toward an investment decision and could come on stream in 2029. The Johan Sverdrup field accounts for approximately one-third of Norway's oil production. It is located in the Utsira High (Utsirahøyden) in the central North Sea, 65 kilometers northeast of the Sleipner field, in water depths of 115 meters. The main reservoir is oil in sandstones of the Upper Jurassic Draupne Formation, at a depth of 1,900 meters, with excellent reservoir quality and very high permeability. Remaining oil resources are distributed in sandstones of the Upper Triassic Statfjord Formation and the Middle to Upper Jurassic Vestland Group, as well as in sponge spiculites of the Upper Jurassic Viking Group. Oil has also been confirmed in the Permian Zechstein carbonates.

Equinor is the operator of the Johan Sverdrup field (42.62% interest), with partners including Aker BP (31.57%), Petoro (17.36%), and TotalEnergies (8.44%).

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