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Wellesley Petroleum has confirmed a significant gas and condensate discovery offshore Norway, as verified by the Norwegian Petroleum Directorate (NPD).
Wellesley Petroleum Confirms Gas/Condensate Discovery in Offshore Norway
Wellesley Petroleum AS, the operator of production license 1148, has announced a significant gas and condensate discovery in wildcat wells 35/10-10 S and 35/10-10 A (Carmen prospect) offshore Norway. This discovery has been confirmed by the Norwegian Petroleum Directorate (NPD).
The wells are situated approximately 25 km northwest of the Troll field and 150 km northwest of Bergen.
The primary exploration goal for well 35/10-10 S was to identify petroleum in Middle Jurassic reservoir rocks within the Etive and Oseberg formations of the Brent Group. Additionally, the well aimed to discover petroleum in the Early Jurassic Cook Formation as a secondary target.
Appraisal well 35/10-10 A was drilled to identify the petroleum-water contact at a lower structural position and to gather liquid samples from the aquifer.
In well 35/10-10 S, a 210-meter gas-condensate column was encountered in the Ness, Etive, and Oseberg formations, with 90 meters of sandstone reservoir of poor to moderate quality. The Cook Formation revealed a 70-meter gas-condensate column, including 23 meters of sandstone reservoir with poor quality. Additionally, a 13-meter oil column was found in the Early Jurassic Amundsen Formation of the Dunlin Group, all 13 meters being sandstone reservoir with poor quality.
Well 35/10-10 A, drilled 900 meters west of the main well, encountered a 240-meter gas-condensate column in the Ness, Etive, Oseberg, and Cook formations, with 50 meters of sandstone reservoir of poor to moderate quality. Water was found in the Cook Formation at a vertical depth of 4,158 meters below sea level.
Preliminary estimates suggest the discovery size ranges between 9 and 46 million standard cubic meters (Sm3) of recoverable oil equivalent. The licensees will start early-phase development studies and consider additional appraisal wells for the discovery.
Well 35/10-10 S reached a vertical depth of 4,030 meters below sea level, ending in the Amundsen Formation of the Early Jurassic, while well 35/10-10 A reached 4,212 meters, terminating in the Cook Formation of the Early Jurassic. Both wells underwent extensive data acquisition and sampling.
These are the first exploration wells in production licence 1148, awarded in APA2021. The water depth at the drilling site is 360 meters, and both wells have been permanently plugged and abandoned.
The drilling operations were carried out by the Deepsea Yantai semi-submersible rig, which will next drill wildcat well 25/7-11 S in production licence 984 in the North Sea, operated by DNO Norge AS.
Earlier in June, Wellesley's partner DNO announced this "significant" gas and condensate discovery at the Carmen prospect, claiming it to be the largest offshore discovery in Norway since 2013.
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