31/2-21 S

26/05/2014 Tullow Oil Norge AS, operator of production licence 550, is about to complete drilling of wildcat well 31/2-21 S. The well was drilled about 12 kilometres northwest of the Troll C platform in the North Sea.

The primary exploration target for the well was to prove petroleum in Upper Jurassic reservoir rocks (Draupne formation). The secondary exploration target was proving petroleum in Upper and Middle Jurassic reservoir rocks (Sognefjord, Fensfjord, Krossfjord formations and the Brent Group).

The well did not encounter reservoir rocks in the Draupne formation. In the secondary target, reservoir rocks were encountered in the Sognefjord, Fensfjord, Krossfjord formations and the Brent Group. The reservoirs are of good quality, but are water-filled. The well is dry. Data acquisition has been carried out.

This is the first exploration well in production licence 550. The licence was awarded in APA 2009. 

The well was drilled to a vertical depth of 3217 metres below the sea surface and terminated in Lower Jurassic reservoir rocks (Cook formation). The water depth is 348 metres. The well will now be permanently plugged and abandoned.

Well 31/2-21 S was drilled by Borgland Dolphin which will now proceed to production licence 558 in the Norwegian Sea to drill wildcat well 6507/5-7, where E.ON E&P Norge AS is the operator. 

Contact in the Norwegian Petroleum Directorate

Eldbjørg Vaage Melberg, tel. +47 51 87 61 00


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Updated: 27/05/2014