Southern North Sea
24 February 2016

Appraisal well and sidetrack on the Humphrey Field. Humphrey is a combined structural/stratigraphic trap; an east-west trending and northerly dipping fault block with closure limited to the Upper Carboniferous and with Lower Ketch 2 reservoir sandstones (Westphalian C) sealed along the unconformity surface by
claystones and thin halites of the Lower Permian Silverpit Formation at approximately 12,100 ft. The trap is further defined by NE-SW trending extensional faults, with Upper Ketch Member claystones provide the side-seal to the south east, and Lower Ketch claystones to the north-west. Gas reserves are estimated at 35–40 bcf. Both the main hole and sidetrack were abandoned tight.