Wellesley Petroleum drills North Sea dry hole
Wellesley Petroleum AS drilled a dry well in North Sea production license 248C. Well 35/11-29 S (Toppand east) was drilled using the COSL Promoter, which will now proceed to well 7220/2-2 in production license 1080 for Equinor Energy AS.
Toppand east was drilled to respective vertical and measured depths of 3,490 m and 3,575 m subsea. It was terminated in the Cook formation in the Lower Jurassic. Water depth at the site is 355 m.
The objective was to prove petroleum in Middle Jurassic reservoir rocks in the Brent Group and the Oseberg formation.
The well encountered the Ness formation with a total thickness of around 64 m with an 18-m sandstone reservoir with poor reservoir quality, the Etive formation with a total thickness of around 51 m with a 26-m sandstone reservoir with good reservoir quality, and the Oseberg formation with a total thickness of around 50 m with a 50-m sandstone reservoir with moderate reservoir quality.
The well is classified as dry and has been plugged.
Equinor is operator at PL 248C (30%) with partners Petoro AS (40%) and Wellesley Petroleum (30%). Wellesley was operator for well 35/11-29 S.
Alex Procyk | Upstream Editor
Alex Procyk is Upstream Editor at Oil & Gas Journal. He has also served as a principal technical professional at Halliburton and as a completion engineer at ConocoPhillips. He holds a BS in chemistry (1987) from Kent State University and a PhD in chemistry (1992) from Carnegie Mellon University. He is a member of the Society of Petroleum Engineers (SPE).
