Norwegian firm Equinor and its partner DNO have made an oil and gas discovery in production licence PL827S, near the Troll field in the Norwegian North Sea, following the drilling of wildcat well 35/10-9.

Well 35/10-9 has been drilled using the Deepsea Stavanger drilling facility approximately 10km north-west of the Fram field and nearly 140km north-west of Bergen.

Following drilling, the discovery well, which is named Heisenberg, identified hydrocarbons in Hordaland Group sandstones of the Paleogene Age.

As per the preliminary estimates, the discovery holds gross recoverable resources in the range of 24 million to 84 million barrels of oil equivalent.

Equinor said that an appraisal well is planned to be drilled in 2024 to get a more precise estimate of the discovery’s size.

Equinor exploration and production west senior vice-president Geir Sørtveit said: “With discoveries in eight out of nine exploration wells, we are approaching a success rate of 90%.

“We plan to further explore the area while looking at possible development solutions for the discoveries that have been made. We have a good infrastructure in the area and can quickly bring competitive barrels from here to the market at low cost and with low CO₂ emissions.”

Equinor operates the PL827S licence with a 50% stake while DNO owns the remaining stake.

The licence partners plan to delineate the discovery and assess the field development potential using tie-ins to existing infrastructure.

In a press statement, DNO said: “Together with a string of recent discoveries in the area, Heisenberg may ultimately be tied back to the Equinor-operated Troll field about 40km to the south-east.”