Oil discovery at Langfjellet

Det norske oljeselskap ASA (“Det norske”), operator of PL 442, announces that drilling of exploration well 25/2-18 S on the Langfjellet prospect in the North Sea is about to be completed.

The well encountered a gross oil column of 109 meters in the Vestland Group. A technical sidetrack was drilled to collect data and the well is currently being prepared for a sidetrack and welltest. Preliminary volume estimates for the discovery are in the range of 24 to 74 million barrels of oil equivalent. The licensees will evaluate the discovery with regards to a potential development together with other discoveries in the area. Following the successful drilling results at Langfjellet, the licensees have identified further prospectivity within the license.

Det norske is operator and holds a 90 percent working interest in PL442. LOTOS Exploration and Production Norge AS holds the remaining 10 percent.

Contacts:
Investor contact: Jonas Gamre, VP Investor Relations, tel.: +47 971 18 292
Media contact: Rolf Jarle Brøske, SVP Communications, tel.: +47 911 12 475

About Det norske:
Det norske is a fully-fledged E&P company with exploration, development and production activities on the Norwegian Continental Shelf (NCS). We are building one of Europe’s largest independent E&P companies.

Det norske is the operator of the producing Alvheim field and for the Ivar Aasen field development. In addition, the company is partner in the Johan Sverdrup field. Det norske has an active exploration programme on the Norwegian shelf and an ambitious strategy for growth.

Det norske’s headquarters are located in Trondheim, with branch offices in Stavanger, Oslo and Harstad. Det norske is listed on Oslo Børs with ticker ‘DETNOR’. More about Det norske at www.detnor.no/en/.

This information is subject to disclosure requirements pursuant to section 5-12 of the Norwegian Securities Trading Act.