Tullow has a track record of discovering significant oil resources in East Africa. The Group first started exploring in Uganda in 2006, successfully opening the Lake Albert Rift Basin, which has discovered resources of some 1.7 billion barrels of oil. Tullow has taken its knowledge and understanding of the geology in Uganda across into neighbouring Kenya. Since 2012, Tullow’s successful exploration and appraisal drilling campaigns in Kenya have resulted in the opening of a second new tertiary rift play in the South Lokichar Basin. An accelerated exploration and appraisal campaign was completed in the basin and initial assessment indicates recoverable resources of up to 750 million barrels of oil. The Group re-started exploration in the basin in December 2016 to de-risk resources found to date and target the overall upside potential of 1 billion barrels.
The first well in this campaign, the Erut-1 well in Block 13T, Northern Kenya, discovered a gross oil interval of 55 metres with 25 metres of net oil pay at a depth of 700 metres. The result shows that oil has migrated to the northern limit of the South Lokichar basin and has de-risked multiple prospects in this area which will now be considered in the Partnership’s future exploration and appraisal drilling programme.
The Ngamia-1 exploration well in Kenya marked the start of a significant programme of drilling activities across the acreage. In 2012, the Ngamia-1 well successfully encountered over 200 metres of net oil pay, the second East Africa onshore tertiary rift basin opened by Tullow. This has since been followed by further exploration success in the South Lokichar Basin at the Ngamia, Twiga, Etuko, Ekales-1, Agete, Amosing, Ewoi, Ekunyuk, Etom, Erut and Emekuya oil accumulations. Tullow has a number leads and prospects yet to drill which will target upside in the South Lokichar Basin as well as new basins across its acreage.