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Last updated: 19 November 2014

Key statistics

1H 2014 Exploration and appraisal wells 1H 2014 Success rate
8 63%

Tullow’s East African Rift Basin acreage in Kenya and Ethiopia shares many geological attributes with the Group’s Lake Albert Rift Basin position in Uganda. The acreage, which is located 500 km to the east of Lake Albert showed good evidence of a live oil system prior to Tullow’s drilling activity. The Loperot-1 well drilled in 1992 recovered 29 degree API waxy crude from Miocene sandstones.

Tullow’s first well in the basin, Ngamia-1, in Block 10BB, commenced drilling in January 2012 and discovered over 200 metres of net oil pay. This significant exploration result demonstrates that substantial oil generation has occurred in the South Lokichar Basin, which is one of a number of Tertiary Rift Basins in Tullow's Kenya-Ethiopia acreage, each of which is similar in magnitude to the Lake Albert Rift Basin in Uganda. The second well, Twiga South-1, also made a major discovery in this frontier basin swiftly followed by further successes at Etuko-1 and Ekales-1. Tullow has now made a total of nine wildcat discoveries in the basin out of eleven drilled and following a number of successful appraisal wells the discovered PMean resources are estimated to be over 600mmbo. Tullow now expects to drill a significant number of wells  in Kenya , including five new sub basin opening wells during 2015.

A Full Tensor Gradiometry (FTG) Gravity Survey has been completed across most of the Kenya-Ethiopia licence blocks. Over 100 leads and prospects have been identified in the 10+ basins. Additional 2D and 3D seismic data is being acquired to assist with the accelerated exploration and appraisal campaigns.  Tullow is currently operating three rigs and a workover unit.

Given the significant volumes discovered and the extensive exploration, appraisal and seismic programme planned to fully assess the basin potential, Tullow and its partner have agreed with the Government of Kenya to commence development studies. The governments of Kenya, Uganda and Rwanda have signed a Memorandum of Understanding (MoU) and formed a Steering Committee to progress a regional crude oil export pipeline from Uganda through Kenya. The Kenya upstream partners have also signed a cooperation agreement with the Uganda upstream partners in support of the same objective. In addition, the partnership is involved in a comprehensive pre-FEED study for the export pipeline. The current ambition of the Government of Kenya and the joint venture partnership is to reach project sanction for development, including an export pipeline, in early 2016. If further exploration success opens additional basins there will be scope for the development to be expanded.

In offshore Kenya Block L8, the Mbawa-1 exploration well result was announced in September 2012 after encountering approximately 52 metres of net gas pay in the shallower primary target. Tullow had a 15% interest in the licence, targeting a separate Transform Margin Play, but the licence was relinquished in January 2014.

18 month Exploration & Appraisal Programme