Zink Ranch

1,520 net acre Zink Ranch Field ('Zink Ranch'), Osage County, Oklahoma in which the Company has a 100% working interest ('WI') and 75% net revenue interest ('NRI'). As announced on 15 May 2018, the multi-phase work programme, consisting of workover, new drill and pressure maintenance operations, is focused on increasing production and proving up substantial reserves at Zink Ranch that are believed by the Company to be economically recoverable.