Moray Firth / Witch Ground Graben
1 September 2013

Balloch Field appraisal; a Jurassic tilted fault block structure. Discovery well 15/20b-18Z proved a 39.4° API oil in a thin (c. 40 ft gross) Piper Sandstone at c. 8,180 ft TVDSS on western part of the structure with ODT to c. 8,209 ft TVDSS. Well 15/20a-19 was drilled to locate OWC in eastern area, with thicker Piper anticipated (up to 150 ft gross). Well was deviated ENE from Dumbarton DC2 subsea manifold. Planned development with one to three production Well Q3 2013 with production continuing until 2019. P10 recoverable reserves 24.5 mmbbl oil and condensate and 11 bcf gas. The well was abandoned and the 15/20a-19Z sidetrack, believed to be a development well to the BE location in the eastern part of the Balloch Field, was kicked off."