TRONDHEIM, Norway -- Det norske has discovered oil in the Storklakken prospect, 20 km (12.4 mi) northwest of the decommissioned Frøy field in the Norwegian North Sea.
The semisub Aker Barents drilled exploration well 25/1-11 and subsequent side track 25/1-11 A in 107 m (351 ft) of water in production license PL 460, which Det norske operates with a 100% interest. It estimates proven volumes via the two wells at 7-12 MMboe.
Both were designed mainly to prove hydrocarbons in the Frigg/Odin formations (the Hordaland and Rogaland groups). The secondary aim was to prove hydrocarbons in the Hermod/Heimdal formations (the Rogaland Group).
Well 25/1-11 encountered oil in the upper part of a sandstone unit, which exhibits strong reservoir properties in the Frigg formation. Sidetrack 25/1-11 A was drilled upflank towards the top of the structure, and identified further oil, again in good-quality reservoir sands.
The total oil column is around 19 m (62 ft) long, and a 1-m (3.3-ft) gas column was also proven. The discovery has not been tested, but comprehensive data acquisition and sampling have been carried out. Although the Hermod and Heimdal formations were dry, here two the wells encountered reservoir rocks with good reservoir quality.
Storklakken is 220 km (136.7 mi) northwest of Stavanger. It is also around 12 km (7.4 mi) from the abandoned Frigg field, and 5 km (3.1 mi) south of the 25/1-9 discovery well.
These were Det norske’s first exploratory wells in PL 460, awarded under Norway’s APA 2007 2007 round. Both were terminated in the Middle Palaeocene Hemidal formation, and will be permanently plugged and abandoned. Det norske believes Storlakken is probably commercial, and could be tied in to an existing or planned offshore installation in the area.
On completing its program, the Aker Barents will transfer to license 326 in the Norwegian Sea to drill an appraisal well (6604/10-1) for Norske Shell.
This year, Det norske says it has continued working on a revised plan for development and operation (PDO) of the Frøy field in PL 364. The license partners aim to deliver an updated PDO this summer. Technical studies are under way, as are commercial negotiations with equipment/installation suppliers.
The company aims to issue the development contract this fall, after the PDO has been approved, allowing production to start in 2013.