Wellesley Petroleum AS has plugged exploration well 25/1-13 in PL871, 20 km north of Vilje field in the North Sea. The well encountered only traces of gas in the Frigg formation, and is classified as dry.
The exploration well—the first in the license—was drilled to a vertical depth of 2, 125 m subsea with the Transocean Arctic semisubmersible drilling rig 220 km northwest of Stavanger. It was terminated in the Balder formation in the Palaeocene.
The objective of the well was to prove petroleum in reservoir rocks in the Eocene (the Frigg formation). It encountered the Frigg formation with a thickness of about 50 m, with 10 m of aquiferous sandstone, mainly with good reservoir quality. The underlying upper part of the Balder formation in the Eocene to Palaeocene is about 40 m, with 20 m of aquiferous sandstone with good to very good reservoir quality.
The drilling rig is now headed for the shipyard in Ølen.
