Like this bit from Nutech2 Dec 2018 12:01
Energy Alliance Ltd ("Nutech") on the deeper sections of the Brockham-1 well has identified oil potential in the Portland, Kimmeridge, Oxford, Oolite and Lias. In the report Nutech provides estimates of the volumes of oil in place per square mile, based on the Brockham-1 well, to be in excess of those at Horse Hill.