Drilling continues in Tullow well in Uganda
Hardman Resources, the operator of the Waraga-1 exploration well in Uganda, in which ISEQ-listed Tullow Oil is a 50% partner, today said that since the last report on February 28 the well was drilled to a depth of 1,768 metres.
Wireline logs, including wireline pressure and sampling tools, were run at this depth to investigate hydrocarbons encountered in the well. Subsequent evaluation of these logs and pressure measurements indicates a gross hydrocarbon interval of 32 metres, with a net pay ratio of approximately 50%.
The hydrocarbon type is interpreted as oil. Samples are yet to be recovered from the well because of problems with the wireline sampling tool. No oil-water contact has been observed, although the well has now passed into probable water-bearing sands below the hydrocarbon interval.
Multiple objectives are interpreted in this prospect and, on the basis of seismic correlations between Waraga-1 and Mputa-1, Hardman still expects to intersect deeper objectives, similar to the oil-bearing intervals in Mputa-1, before Waraga-1 reaches total depth.
At midnight on Sunday the well was drilling ahead at 1,872 metres towards a revised planned total depth of approximately 2,050 metres.
Wireline logs including a pressure and sampling programme will be conducted to further evaluate this reported hydrocarbon interval and the expected deeper objectives.
Waraga-1 is located 19 kilometres north-east of the recently-drilled Mputa-1 oil discovery well and 41 kilometres south-west of the Butiaba Waki-1 well (drilled in 1938).
Waraga-1 is testing a structural prospect with identical geological targets to the oil-bearing reservoirs seen at Mputa-1. The Waraga prospect was defined by the 2005 onshore seismic survey and the geological risk was significantly reduced by the success of Mputa-1.
Tullow will provide a further update once logging operations have been completed.
