Total spudded exploration well 30/12d-11 in licence P1820 on 13 October 2019 targeting the Isabella prospect. The HP/HT (12,960 psi and 175 degrees centigrade) gas condensate prospect was understood to be located on one of the largest undrilled fault blocks in the Central North Sea. The well was drilled with the Noble Sam Hartley (J/U). On 17 March 2020 Total announced that it had made a discovery. A total of 64 m net pay of lean gas and condensate and high quality light oil in Upper Jurassic and Triassic sandstone reservoirs has been encountered. Partner Neptune announced that hydrocarbons had been encountered in three separate formations. Further analysis of the discovery is ongoing to determine the discovered resources, subsequent appraisal programme and confirm commerciality. On 7 April 2020 it was confirmed that plug and abandonment operations have completed and the rig has moved off location.  The Isabella trap is formed by closure on a salt pierced anticline. The reservoir target was the Triassic Joanne and Judy Sandstones. The well was planned to be slightly deviated with an estimated TD of 5,607 m.  P1820 was awarded in the 26th Offshore Licensing Round to Valiant and Apache North Sea Ltd. On 23 September 2013 Ithaca announced that it has agreed to farm down a 10% interest in licence P1820 (blocks 30/6b, 30/11a and 30/12d) to Edison subsidiary EDF Production UK Limited in return for a cash payment. It was confirmed that the deal completed on 31 December 2013. On 13 August 2018 Neptune announced that it had agreed to acquire Apacheâs interest in the licence and then late 2018 / early 2019 the operatorship was transferred over to Total.  Interest in P1820 is held by Total E&P North Sea UK Limited (30% + operator), Neptune E&P UK Limited (50%), Edison subsidiary, Euroil Exploration Limited (10%) and Ithaca Energy (UK) Limited (10%).
United Kingdom (Silverpit B. (Anglo-Dutch B.)) Neptune