Drilling took place in licence PL1184 S with the COSL Promotor rig.
The well was an up-dip appraisal targeting the Gnomoria Discovery made in 2018 by well 35/10-4 A and proved around 16 mmboe of recoverable resources.
Well 35/10-12 S encountered an 11-metre gas column and an 18-metre oil column in the Heather Formation, in a sandstone layer totalling 21 metres with poor to moderate reservoir quality.
The gas/oil contact was encountered 3239 metres below sea level. The oil/water contact was not encountered.
The well was not formation tested, but extensive data acquisition and sampling were carried out.
Well 35/10-12 S was drilled to a vertical depth of 3346 metres below sea level (3805 metres measured depth below sea level), and was terminated in the Heather Formation in the Upper Jurassic.
Water depth at the site is 363 metres. The well has been permanently plugged and abandoned.
Wellesley CEO C. Elliott commented:- we are pleased with the Gnomoria result, which adds valuable resources to the ongoing area development plans in the Fram-Toll area;
- although modest in size, the discovery has favourable characteristics which we are confident will allow commercial recovery;
- as with Grosbeak, new subsurface ideas have enabled us to rescue stranded resources classed as «unlikely to be developed», demonstrating the enduring potential for value creation in mature parts of the NCSж
- the operation was highly efficient and we thank COSL and other service providers for an excellent performance in helping deliver a safe and cost-effective well.
