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Friday, 05 December, 2008, 16:50 GMT | more >>

Nzizi-2 delivers for Tullow



By Iain Esau 

Tullow Oil has hit oil and gas with the Nzizi-2 appraisal well, in the Albertine basin onshore Uganda.

The well confirmed sand development and oil accumulations to the south west of Nzizi-1 and, for the first time in its drilling drive in this region, found the presence of "very productive dry gas".

Nzizi-2 hit four hydrocarbon-bearing zones with the deepest zone at 950 metres.

This zone did not flow oil during tests, said exploration boss Angus McCoss, but held a large amount of oil in-place and is considered a "significant long-term upside exploration objective".

A second, two-metre oil-bearing sand was sampled and indicated moveable oil in a reservoir with high permeability.

Another, four-metre thick zone at 675 metres, flowed oil but is expected to require artificial lift to produce commercially.

The five-metre thick natural gas play, at a depth of 800 metres, flowed at a rate of 14 million cubic feet per day.

Tullow is examining whether the gas can be used as fuel for an early production scheme.

Details of the initial development will be known once results from the Mputa-3 and Mputa-4 appraisal wells have been drilled, following on from Nzizi-2 - and a new 3D survey finished.


Friday, 13 July, 2007, 11:22 GMT  | last updated: Friday, 13 July, 2007, 11:22 GMT

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