The well was drilled from the Brage installation, and the discovery was made in connection with drilling a development well for oil (31/4-A-15 D) in production licence 055.

Preliminary estimates indicate additional resources for Brage of between 0.5 and 1.5 million standard cubic metres (Sm3) of recoverable oil equivalent (o.e.) if the discovery is oil. If it is gas, the preliminary volume estimate is between 0.4 and 0.9 million Sm3 of o.e.

Wellbore 31/4-A-15 D started producing from the 31/4-A-1 B ("Talisker") discovery on 11 January 2026. The licensees are now considering opportunities for developing "Knockando Fensfjord".

Production licence 055 was awarded in the fourth licensing round on the Norwegian continental shelf (NCS) in 1978. Brage was proven in 1980, and the Storting approved the plan for development and operation (PDO) in 1990.

Several discoveries have been made in the Brage area in recent years; for example, "Talisker Cook/Statfjord" (31/4-A-15 B) and "Prince" (31/4-A-23 G) were proven in 2025.

The licensees in the production licence are OKEA (operator), Lime Petroleum, DNO, Petrolia NOCO and M Vest Energy.

Geological information

Development well 31/4-A-15 D was drilled into the reservoir section in the lower Fensfjord Formation of Late Jurassic age on its way to the "Talisker" production target in the Brent Group of Middle Jurassic age. A 38.5-metre column of hydrocarbons was proven in an interval of multiple sandstone layers with moderate to good reservoir quality. The petroleum/water contact was not encountered.

The wellbore was drilled to respective measured and vertical depths of 10,009 metres and 2309 metres below sea level, and was terminated in the Oseberg Formation in the Middle Jurassic. Data was collected in the discovery interval.