By OGJ editors
HOUSTON, July 5 -- Hardman Resources Ltd., Perth, after gauging oil at the rate of 4,200 b/d from the lowermost of three zones at its Waraga-1 discovery on Block 2 in Uganda's Albert graben, is testing the well's middle and upper zones.
The middle perforated interval at 1,782-1,792.5 m averaged 2,400 b/d of oil on a 36/64-in. choke. Following a shut-in period, it sustained 4,200 b/d of oil on a 1-in. choke. The oil is waxy and 33.8° gravity, same as that of the lowermost zone.
The shallowest interval stabilized at 2,115 b/d of 18.5° gravity oil on a 36/64-in. choke and was shut-in for pressure buildup prior to further tests.
The rig will move to the Mputa area for tests. Block 2 interests are Hardman and Tullow Oil PLC, London, 50% each.
Meanwhile, about 20 km southwest of Mputa, Heritage Oil Corp., London, and Tullow plan to drill as deep as 4,000 m at the Kingfisher structure on Block 3A. Kingfisher is 47 km east-northeast of Turaco, where Heritage drilled 3 wells that discovered hydrocarbons and gas had high carbon dioxide content (OGJ Online, Feb. 15, 2005).
From the Turaco drillsites, the CO2 content is expected to decrease northeastwards towards Kingfisher, Heritage said.
Tullow said Kingfisher is a higher-risk wildcat on a structure capable of holding 1.3 billion bbl of oil in place. It will target a large fault-closed and northwesterly dipping structure.
"The well will calibrate the stratigraphy in this unexplored part of the basin. As such, it may not have well-developed reservoir-seal configurations and the seismic definition of the basement is unclear, so exploratory sidetracking is therefore a possibility," Tullow said. The companies have identified more prospects on Block 3A.
