The Ossian-Darach NFW 42/4-1 & 1Z has been confirmed as an oil and gas discovery in SNS licence P2133. 42/4-1 spudded on 16 May 2019 and reached TD at 3,300m TD (3,255m TVD) encountering targeted 286m gross Carboniferous Yoredale Formation and 407m gross of Carboniferous Fell Sandstone Formation but without hydrocarbons, the thirdly targeted Permian Zechstein Formation had gross 44m limestone and had oil (with gas). 42/4-1 Z kicked off from the 42/4-1 NFW on 5 July 2019 to test 3.7m of the Permian Zechstein Formation, reaching TD 2,278m (2,265m TVD). 42/4-1 Z flow tested at a maximum rate of 3,500 boe/d, producing 454.5 bo and 529,500 cfg over 81 hrs, with a water cut of 79%. 42/4-1 Z reached TD on 13 July 2019 and operations had concluded by 30 August 2019 with the "Ensco 121" jack-up moving off location. Partner Spirit Energy has announced that it has applied to take over as operator from 1 February 2020, and that the discovery requires further appraisal confirm volumes and the commerciality. 42/4-1 was targeting Early Carboniferous Visean channel sands with a PTD of around 3,284m MD (vertical well), estimated to take 72 days. The well is located on the southern margin of the Dogger Shelf, and the "Ensco 121" jack-up is operating in 70m WD. The licence was awarded to Sterling Resources on 20 December 2013 under the 2nd tranche of the 27th Round, with a commitment to obtain and reprocess 2D seismic and drill one well during the initial period, which has been extended to December 2020. P2133 has not previously been drilled, and originally covered blocks 36/30, 42/2a, 42/3a, 42/4, 42/5 (1,046 sq km) on award, but was part relinquished to 523 sq km on 36/30a, 42/4, 42/3a and 42/5a in December 2016. It is 40km N of the INEOS operated Breagh field which produces gas from Early Carboniferous sandstones. Sterling Resources had also identified the Ossian (Permian Reef) as a candidate drill target on the acreage. Oranje-Nassau Energie (ONE) obtained the licence when it purchased Sterling Resources (UK) Ltd in May 2017, and later assigned 30% to Neptune Energy and 35% to Spirit Energy in January 2019. ONE merged with Dyas on 1 April 2019. P2133 equity partners are ONE-Dyas UK Ltd (35% + Op), Spirit Energy Resources Ltd (35%), and Neptune E&P UK Ltd (30%). 
United Kingdom, P2133