Update on Langlitinden exploration well

Det norske oljeselskap ASA has, as operator for PL 659, from core samples identified hydrocarbon shows in exploration well 7222/11-2 on the Langlitinden prospect in the Barents Sea.

Drilling operations are ongoing and final results are thus not yet available.

Det norske oljeslskap ASA is operator for the license with a 30 percent interest (20 percent)*. Partners include Petoro 30 percent, Lundin Norway 20 percent, Tullow Oil 10 percent (15 percent)*, Atlantic Petroleum 0 percent (10 percent)*, Rocksource Exploration Norway 5 percent and Ithaca Petroleum Norge 5 percent (0 percent)*.

* Det norske has transferred a ten percent working interest to Atlantic Petroleum.  Ithaca has transferred a five percent working interest to Tullow Oil Norge AS. The transactions are subject to government approval. New ownership interests following government approval are listed in brackets.

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