Wintershall Dea Norge AS and partners are evaluating development options following completion of an appraisal well that increased the resource estimate for a gas-condensate discovery in production license (PL) 211 CS in the Norwegian Sea.
Estimated recoverable volumes for the 2021 Adriana discovery (6507/4-2 S) have been increased to 28-43 MMboe from an initial estimate of 19-31 MMboe.
Well 6507/4-4 S well was drilled by the Transocean Norge rig 14 km north of Dvalin field and 270 km north of Kristiansund in 446 m of water.
The primary exploration target was to confirm the size of the Adriana discovery in the Cretaceous Lysing formation, including to investigate the reservoir's lateral development. The appraisal well encountered a 21-m gas column in the Lysing formation with sandstone layers totaling about 16 m with good to very good reservoir quality. The gas-water contact was proven at 2,885 m subsea.
The well was not formation-tested, but data acquisition and sampling were carried out. The well has been permanently plugged.
Drilling of sidetrack 6507/4-4 A, which aimed to confirm the size of the 6507/4-2 S (Sabina) gas-oil discovery in the Lange formation, was aborted due to technical drilling issues. The operator may attempt a re-entry in 2024 or 2025.
The rig has now moved to Wintershall-operated Maria field for the field’s second-phase development.
Wintershall Dea is operator of PL 211 CS with 40% interest. Partners are PGNiG Upstream Norway AS (10%), Petoro AS (35%), and Aker BP ASA (15%).