Offshore Staff
LONDON -- The Mahogany-2 well, which is being drilled to appraise the Jubilee field offshore Ghana, has intersected a significant column of light oil, according to Tullow Oil. Results of drilling, wireline logs, and samples of reservoir fluid, indicate that Jubilee is a single continuous stratigraphic trap extending at least 11 km (6.8 mi) to the Hyedua-1 discovery well in the adjacent Deepwater Tano license, the company says.
Mahogany-2, which lies in the West Cape Three Points license, is the first appraisal well on the Jubilee field and is targeting the Turonian turbidite sandstones encountered in the Mahogany-1 and Hyedua-1 discovery wells. The well has encountered a gross reservoir interval of 243 m (797 ft), containing 63 m (206 ft) of high quality stacked reservoir sandstones, and net hydrocarbon-bearing pay of 50 m (164 ft). Results of logging and pressure testing indicate that the combined hydrocarbon columns are in excess of 600 m (1,969 ft).
A limited flow test on Mahogany-2 is under way to determine potential production rates from these reservoirs and to collect further oil samples for analysis. Testing is expected to take approximately four weeks and the well will then be suspended for use as a potential development well.
TheSonga Saturn drilled the well to 3,443 m (11,296 ft) TD in water depths of 1,080 m (3,543 ft). Three more Jubilee appraisal wells are planned for 2008 and will be drilled by the Blackford Dolphin semisubmersible. The next Jubilee appraisal well, Hyedua-2, is expected to spud in July in the adjacent Deepwater Tano license in which Tullow has a 49.95% interest.
"The confirmation that Mahogany-2 is in communication with both Mahogany-1 and Hyedua-1, reinforces our interpretation that Jubilee is a major discovery and is likely to lead to a material upgrade of current resource estimates," Aidan Heavey, chief executive of Tullow. "We will continue our appraisal and development program over the remainder of 2008 with the overall objective of achieving first production in 2010."
05/07/2008
