16-07-08 Tullow Oil has tested 4,448 bpd of oil from the Mahogony-2 appraisal well in Jubilee field off Ghana. Tullow reported that it expects to start oil production from Jubilee field in 2010. Its suggested upside could be as much as 1.8 bn bbl of oil.
The well also produced 5.1 mm cfpd of associated natural gas through a 36/64-inch choke with a flowing tubing pressure of 1,936 psi. Oil was 39 degrees gravity.

"The test encompassed a 23-m perforated interval representing 40 % of the oil-bearing pay in the well's upper sands," said Kosmos Energy, a partner in the field. "The flow rate was limited by equipment and facilities."
This second set of drill stem test results on the upper zone is significant because it indicates that a Jubilee production well should produce more than 20,000 bpd with 5 1/2-inch tubing.

The Songa Saturn drillship remained on location following the first drill stem test in June that struck a single 17-m interval in the well's lower zone and produced 5,200 bpd of 36 degrees oil. About 5.5 mm cf of associated natural gas flowed through a 40/64-inch choke with a flowing tubing pressure of 1,543 psi.
Jubilee and Odum, another discovery13 km from the field, have proved two new plays and derisked substantial follow-up prospects scheduled for drilling in Ghana and Cote d'Ivoire within the next 12 months, Tullow Oil said.

Partner Kosmos Energy plans to drill other exploration and appraisal wells on the West Cape Three Points block, which it operates, and Tullow will drill on its deepwater Tano block in September, using the deepwater Blackford Dolphin, Eirik Raude, and Atwood Hunter rigs.
The partners will use a floating production, storage, and offloading vessel to produce oil and subsea wells from Jubilee in its first development phase. Jubilee was discovered last year in 1,500 m of water and is estimated with 90 % probability to hold 170 mm bbl of recoverable oil. It straddles the boundary between the West Cape Three Points Block and Tullow Oil's Deepwater Tano Block.

The West Cape Three Points block is 1,761 sq km and in water depths of 50-1,800 m.
Kosmos Energy is operator of the deepwater West Cape Three Points Block and holds a 30.875 % interest. Anadarko Petroleum has a 30.875 % interest; Tullow 22.896 %; the E.O. Group 3.5 %; and Sabre Oil & Gas Holdings a 1.854 % interest in the block. Ghana National Petroleum Corp. (GNPC), which has a 10 % participating interest in the project, will be carried through the exploration and development phases.