03-09-08 Canadian outfit Heritage Oil is likely to upgrade potential oil reserves in Block 3A in Uganda following positive testing results from the Kingfisher-2 appraisal well.
Joint venture partner Anglo-Irish independent Tullow Oil said that the higher rates recorded from all three test intervals were constrained by the surface test equipment. However, it appears that these three zones are equivalent to the same three intervals tested in the Kingfisher-1 well, which flowed at a combined rate of 9,773 barrels of oil per day.

Pressure data recorded from the intervals indicate that the two lowermost sands are possibly in vertical communication and therefore could comprise the same reservoir, which could potentially lead to higher oil volumes.
Tullow said it is likely that there will be an upgrade to potential oil reserves following drilling of the Kingfisher-2 well. Prior to the drilling of Kingfisher-2, the gross contingent resources of Kingfisher were independently evaluated by RPS Energy to have a most likely volume of 118 mm barrels.

The Nabors 221 rig will now move about 3 km south of Kingfisher-2, along the Lake Albert shoreline, to drill the Kingfisher-3 appraisal well, which will evaluate the southern portion of the field.
Meanwhile the first drilling programme in Block 1 is scheduled to start this month, with the drilling of the Warthog prospect. This is part of a three well programme which also includes the Buffalo and Giraffe prospects.