Premier spudded appraisal well 42/28d-14 on Tolmount East on 8 August 2019. The well targeted the Tolmount East structure located in block 42/28d (P1330). The company used the âValaris 123â J/U to drill the well. On 17 October 2019 it was announced that the well had penetrated a 241 ft gas bearing section of high quality Leman sands with a net-to-gross of 71%, porosity of 16% and gas saturation of 82% and no gas-water contact was found. The reservoir was successfully cored with 216 ft being recovered. The well data will be pulled into the 3D dataset as Premier looks to fast-track Tolmount East to be tied into the Greater Tolmount Area project. The results of this well have positive implications for further upside in the area including Tolmount Far East and the Mongour discovery. On 20 November 2019 it was confirmed that the rig left location that day.  Tolmount was discovered with well 42/28d-12 in 2011. The well encountered a gas column in excess of 200 ft (61 m) within the Permian Leman Sandstone. The well tested and flowed at a rate of 50 MMcfg/d. Tolmount is a simple structural prospect which was mapped at Top Rotliegend level, the overlying Silverpit Formation and Zechstein evaporites provide top seal and gas charge is from the underlying Carboniferous coals.   Interest in licence P1330 is held by Premier Oil E&P UK Limited (50% + operator) and Dana Petroleum (E&P) Limited (50%).
42/28d-14 (Tolmount East) pos. appr. (Premier op. 50%, Dana Petr. 50%) in P1330, Silverpit Platform, 73m gas zone in the Rotliegend Leman sands, net-to-gross ratio 71%, 16% porosity, gas saturation 82%, GWC encountered. To be susp. as a future producer, WD ca. 15m.