Wellesley Petroleum was chasing biogenic gas in Songesand in PL 931 in the northern North Sea together with partner DNO. The target of well 35/4-2 was to prove gas in sandstones of the Pliocene intra Naust Formation. The well did not find any reservoir. A sequence of mudstones and siltstones in the intra Naust Formation was encountered with some traces of gas at the top.
Read here the NPD press release.
Wellesley will now move on to drill their next well 25/1-13 (Balcom) in PL 871 in the central North Sea.