Newvision Tullow Oil has made a further oil discovery in Uganda after the Ngiri-2 appraisal well came up trumps with the thickest oil pay found so far in the Butiaba area. The well, located 1.7km north of the Ngiri-1 discovery well, encountered over 40 metres of net oil bearing reservoir in two zones within an overall 131 metre gross oil-bearing interval after being drilled to a total depth of 892 metres. Tullow, which has now discovered more than 950 million barrels of oil in its exploration and appraisal campaign in Uganda, says the reservoir quality is "excellent" and akin to the Kasamene field in Block 2, where a production rate of 3,500 barrels of oil a day was achieved during testing in 2009. The Ngiri-2 well is the first of a multi-well appraisal programme to further evaluate the extent and recovery potential of the Ngiri field. The oil heavyweight is now planning further activities for the fourth quarter of this year with the drilling of down-dip appraisal wells Ngiri-3 and Ngiri-4 designed to establish oil water contacts and reservoir distribution. Its estimate of the yet-to-find oil remains unchanged at 1.5 billion barrels of oil. Angus McCoss, exploration director at Tullow, said: "The 40 metres of net oil pay in Ngiri-2 is the thickest oil pay so far encountered in the Butiaba area, demonstrating that after 32 successes in 33 wells the Lake Albert Rift Basin continues to deliver from the undrilled upside potential. "This continued success supports our planning for the accelerated basin-wide development with our future new partners Total and CNOOC."