Island Wellserver prepares to plug TOGI wells

Offshore staff

OSLO, Norway -- Petroleum Safety Authority Norway has approved Statoil’s request to deploy the Island Wellserver vessel in the North Sea.

The vessel will perform well intervention activities on the Troll Oseberg Gass Injection (TOGI) complex, the aim being to permanently plug back all five wells on the 31/5-B subsea template and then prepare this structure for removal.

Island Wellserver will kill the wells with mud/brine, install plugs, and pull christmas trees.
In the Norwegian Sea, Statoil currently is completing an appraisal well in production license 429 as a dry hole.

The Transocean Leader drilled well 6407/4-2 to delineate the 6407/4-1 discovery, which proved gas and condensate in 1985 in mid-Jurassic reservoir rocks (the Garn formation) around 25 km (15.5 mi) west of the Mikkel field.

Prior to the latest well 6407/4-2, according to the Norwegian Petroleum Directorate, the resource estimate was 2.55 bcm of recoverable gas and 0.67 MMcm of recoverable condensate.

This was the first exploration well on the license, awarded under Norway’s APA 2006 round.

Transocean Leader will next head to PL 312 in the Norwegian Sea to drill wildcat well 6407/3-1 S for Statoil.

04/13/2011



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