The Brage field was discovered in 1980 and has been in production since September 1993. Credit: OKEA.

OKEA and its partners have announced a petroleum discovery in the Knockando Fensfjord prospect in the Norwegian North Sea, identified through development well 31/4-A-15 D from the Brage installation.

The well forms part of production licence (PL) 055. 

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Brage is located in the northern section of the North Sea, positioned approximately 10km to the east of the Oseberg field, in a water depth of 140m.  

The Brage field was discovered in 1980 and has been in production since September 1993. 

Preliminary assessments suggest that the discovery may contribute additional resources to the Brage field, with estimates ranging from 500,000 to 1.5 million standard cubic metres (mscm) of oil equivalent, if oil is present.  

In the case of gas, predicted volumes are between 400,000 and 900,000 standard cubic metres of oil equivalent. 

Geologically, development well 31/4-A-15 D reached a reservoir section within the lower Fensfjord Formation of Late Jurassic age en route to its Talisker target within the Middle Jurassic Brent Group.

A hydrocarbon column measuring 38.5m was found across multiple sandstone layers of moderate-to-good reservoir quality, although no petroleum-water contact was detected. 

The drilling achieved measured and vertical depths of 10,009m and 2309m, respectively, below sea level before concluding in the Middle Jurassic Oseberg Formation.  

According to the Norwegian Offshore Directorate, production from wellbore 31/4-A-15 D commenced on 11 January 2026, utilising output from the Talisker discovery.

Recent exploration efforts in Brage have led to several other discoveries, including Talisker Cook/Statfjord and Prince, both verified in 2025.

PL 055, initially awarded during the fourth Norwegian Continental Shelf licensing round in 1978, remains valid until 31 December 2040. 

The current consortium of licensees includes OKEA, which acts as the operator with a 35.2% stake, and partners Lime Petroleum (33.84%), DNO (14.25%), Petrolia NOCO (12.25%) and M Vest Energy (4.44%). 

In May 2024, OKEA granted an integrated engineering, procurement, construction and installation contract to the Subsea Integration Alliance, a partnership between SLB OneSubsea and Subsea7, for the development of the Bestla project in the North Sea.