Saturday, June 4, 2016

Foto PetroSociety.
Statoil drills minor discovery, dry appraisal well in North Sea

STAVANGER, Norway -- Statoil Petroleum, operator of production license 035, is in the process of concluding the drilling of wildcat well 30/11-12 S and appraisal well 30/11-12 A. The wells were drilled 2 km south of the 30/11-9 A (Askja Øst) discovery, and about 35 km southwest of the Oseberg Sør facility in the North Sea.
The objective of well 30/11-12 S was to prove petroleum in three sandstone layers in Middle Jurassic reservoir rocks (Tarbert formation). The objective of well 30/11-12 A was to delineate in the event a discovery was made in well 30/11-12 S. The 30/11-12 S well encountered a 37-m oil column in the upper part of the Tarbert formation, of which about 30 m had good to moderate reservoir properties. Well 30/11-12 A, which was drilled further down on the structure, encountered similar reservoir rocks, but is dry.
Preliminary estimates place the size of the discovery at between 0.7 and 2.5 million standard cubic metres of recoverable oil equivalents. The discovery will be included in the evaluation of a new field development, along with other earlier discoveries in the area. Data has been collected and samples have been taken in both wells.
Both wells were drilled to vertical and TDs of 3,669 m and 3,671 m, respectively, and 3,609 m and 4,144 m below the sea surface. Well 30/11-12 S was terminated in the Ness formation and 30/11-12 A bottomed in the Tarbert formation. The wells are the 12th and 13th exploration wells in production license 035, which was awarded in 1969.
Water depth is 110 m. The wells have been permanently plugged and abandoned. Both wells were drilled by the Songa Delta drilling facility, which will continue its drilling campaign with the drilling of another wildcat well (30/11-13 S) in the same production license, where Statoil is the operator.


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