Sokkeldirektoratet

Dry well north of the Vilje field in the North Sea – 25/1-13

3/12/2019 Wellesley Petroleum AS, operator of production licence 871, is in the process of concluding the drilling of wildcat well 25/1-13.

The well was drilled about 20 kilometres north of the Vilje field and 220 kilometres northwest of Stavanger.

The objective of the well was to prove petroleum in reservoir rocks in the Eocene (the Frigg formation).
 
25/1-13 encountered the Frigg formation with a thickness of about 50 metres, with aquiferous sandstone layers totalling 10 metres, mainly with good reservoir quality. The underlying upper part of the Balder formation in the Eocene to Palaeocene is about 40 metres, this also with aquiferous sandstone layers totalling 20 metres with good to very good reservoir quality. The well encountered only traces of gas in the Frigg formation, and is therefore classified as dry. 

This is the first exploration well in production licence 871, which was awarded in APA2016.

25/1-13 was drilled to a vertical depth of 2125 metres below the sea surface, and was terminated in the Balder formation in the Palaeocene. The well will be permanently plugged and abandoned.

Well 25/1-13 was drilled by the Transocean Arctic drilling facility, which is now headed for a stay at the shipyard in Ølen.

25-1-13.png

Contact
postboks@sodir.no

Tel: +47 51 87 60 00

Updated: 2/10/2025

Latest news

Technology Day programme announced
4/9/2026 The Norwegian Offshore Directorate’s Technology Day will be held on 4 June. There are still some slots available!
Who will see Gro as a diamond in the rough?
4/8/2026 6603/12-1 (Gro) is one of the largest undeveloped gas discoveries on the Norwegian continental shelf (NCS). There is a considerable value creation potential here, but time is running out.
Production figures February 2026
3/20/2026 Preliminary production figures for February 2026 show an average daily production of 2 176 000 barrels of oil, NGL and condensate.
Oil discovery in the Barents Sea (7220/7-5)
3/18/2026 Equinor and its partners have made an oil discovery in the "Polynya Tubåen" prospect.
Oil discovery in the North Sea (35/11-32 S)
3/10/2026 Equinor and its partner, INPEX Idemitsu, have discovered oil in the “Byrding C” prospect in wildcat well 35/11-32 S.
Who deserves the Improved Recovery Award?
3/4/2026 There is still time to propose candidates for the award, but the deadline is quickly approaching.
Profitable development of tight reservoirs
3/3/2026 According to a mapping conducted by the Norwegian Offshore Directorate, cooperation between the companies, cost reductions and applying new technology can contribute to profitable production from tight reservoirs.
More oil discovered near Snorre (34/4-19 S)
3/2/2026 Equinor and its partners have discovered oil on the “Omega Sør Alfa” prospect in the North Sea, around 200 kilometres northwest of Bergen.
High production and increase in petroleum resources
2/20/2026 According to the Resource Accounts for 2025, oil production on the Norwegian continental shelf (NCS) in 2025 was the highest since 2009.
Production figures January 2026
2/20/2026 Preliminary production figures for January 2026 show an average daily production of 2 219 000 barrels of oil, NGL and condensate.