Discovery on Langlitinden

Det norske oljeselskap ASA is about to complete drilling operations on well 7222/11-2 on the Langlitinden prospect in production licence 659, where Det norske is operator with a 20 percent ownership interest*. The well (7222/11-2) encountered an oil-bearing channel sand of Triassic age.

The primary objective of well 7222/11-2 was to prove hydrocarbons in the Kobbe Formation reservoir (Triassic) and notably to prove good flow properties in the same reservoir. The well encountered oil in a channel sand, which also was the main target for the well.

Extensive data sampling, including cores, wireline logs and fluid samples have been performed. Movable hydrocarbons were proved in the main target for the well, but mini-DST proved poor reservoir properties. The partnership in production licence 659 will evaluate the results carefully with respect to the remaining prospectivity of the licence. Based on preliminary analysis, Det norske is of the opinion that the volumes proven in this well, as of today, are insufficient to justify a field development.

The well was drilled to a total depth of 2,878 metres below sea level. The water depth is 338 metres. The well will now be permanently plugged and abandoned.

The licensees in PL659 are Det norske oljeselskap ASA (20 percent), Lundin (20 percent), Tullow (15 percent), Rocksource (5 percent), Petoro (30 percent) and Atlantic (10 percent)*.

* A prerequisite for these equities is approval by the authorities of the transaction whereby Atlantic receives 10 percent equity from Det norske.

Contact:
Knut Evensen, VP Investor Relations, tel.: + 47 950 77 622.

About Det norske:
Det norske oljeselskap ASA (DETNOR) is an active exploration company on the Norwegian Continental Shelf. Det norske’s headquarters is in Trondheim. The company also has offices in Oslo and Harstad. Det norske is listed on the Oslo Stock Exchange with the ticker "DETNOR".

More about Det norske at www.detnor.no/en