Tullow Oil says that the Nsoga-5 appraisal well, which is located in the Butiaba region of Uganda Block 2, has successfully encountered 10 metres of net oil pay. The Nsoga-5 appraisal well was drilled to a total depth of 587 metres, 2.3 km to the north-east of the Nsoga-1 discovery well, targeting equivalent reservoirs in a previously un-drilled fault block.

The successful Nsoga-5 well was the first of a multi-well appraisal programme planned to further evaluate the extent and production potential of oil accumulations in the greater Nsoga area. The well has now been suspended for future re-entry.

The OGEC IRI-750 rig will now move 2 km south to the Kigogole field where it will drill the Kigogole-5 appraisal well.

Tullow has interests in three licences in the Lake Albert Rift Basin in Uganda. Tullow operates Block 2 with a 100% interest and has a 50% interest in Blocks 1 and 3A which are operated by Heritage Oil (50%).

Angus McCoss, Exploration Director, said, 'Another successful well in the Butiaba appraisal campaign further enhances our understanding of these high quality stacked fluvial reservoirs and will assist with the basin-wide development plan that Tullow and its new partners will be working on during the second half of 2010.'

Tags: Tullow Oil plc