Tullow Oil has announced oil discoveries at the Amosing-1 and Ewoi-1 exploration wells in Block 10BB, and updated its estimate of discovered resources in the South Lokichar Basin to over 600m barrels. “Tullow believes that the overall potential for the basin, which will be fully assessed over the next two years through a significant programme of exploration and appraisal wells, is in excess of 1bn barrels of oil,” the company said. Amosing was drilled on the ‘string of pearls’ basin bounding fault trend that has already delivered discoveries at Ngamia, Twiga South, Ekales and Agete, while Ewoi was drilled on the basin flank, east of the Etuko discovery.