OKEA discovers oil along eastern flank of Brage field

OKEA ASA discovered oil along the eastern flank of Brage field in the northern part of the North Sea 10 km east of Oseberg field in 140 m of water.

The discovery is estimated to hold 0.3–2.8 MMboe. The licensees will assess the deposit as part of further development of Brage field, the Norwegian Offshore Directorate said in a release May 28.

The Brage Unit drilled wildcat well 31/4-A-23 G and Well 31/4-A-23 F as the 13th and 14th exploration wells in production license (PL) 055 following the oil discovery in well 31/4-A-13 E (Kim) in 2023.

Well 31/4-A-23 G was drilled in the southern part of the Prince prospect to 2,171 m TVD subsea and horizontally 2,120-2,171 m TVD along the eastern flank of Brage field to 10,023 m MD. The well terminated in the Heather formation. It encountered a 3-4 m thick sandstone layer in the Sognefjord formation and was drilled to 1,138 m MD along this sandstone layer.

The well proved a 20-m thick oil column in sandstones with moderate to good reservoir properties. The oil-water contact was not encountered. The well was not formation-tested, but data has been collected. Pressure data indicate that the discovery is not in pressure communication with the discovery in 31/4-A-13 E (Kim).

Well 31/4-A-23 F was drilled in the northern part of the Prince prospect 2,153 m TVD subsea and horizontally to 6,285 m MD. It was terminated in the Sognefjord formation. 

The objective of A-23 F was to prove petroleum in Upper Jurassic reservoir rocks in this formation. The objective of A-23 G was to delineate a potential discovery in A-23 F and to delineate the northern part of 31/4-A-13 E (Kim).

Well 31/4-A-23 F encountered a sandstone layer in the Sognefjord formation with a total measured thickness of 220 m along the wellbore and 12 m of vertical thickness with good reservoir properties. The well was dry.

Both wells have been permanently plugged.

Okea is operator at PL 055 (35.2%) with partners Lime Petroleum AS (33.8%), DNO Norge AS (14.2%), Petrolia NOCO AS (12.2%), and M Vest Energy AS (4.4%).