By OGJ editors
HOUSTON, Mar.17 -- Unocal Corp., El Segundo, Calif., reported that its Unocal Ganal Ltd. subsidiary has drilled a successful appraisal well in Gehem field on the Ganal production-sharing contract (PSC) area off East Kalimantan, Indonesia.
David Stangor, president of Unocal Indonesia, said Gehem-2 well test results show the primary zone of interest has a single gas column of more than 550 ft. "This single zone has the potential to contain up to 1.5 tcf of recoverable gas," he said.
A drillstem test (DST) of Gehem-2 flowed 31.3 MMcfd of gas and 1,917 b/d of condensate. The zone was perforated at 15,362-15,523 ft TVD subsea. The DST, constrained by test equipment capacity, had flowing tubing pressure of 6,545 psi on a 32/64-in. choke. The oil section was not tested.
The Gehem-2 well was drilled 300 ft downdip of Gehem-1 and encountered 240 ft of net gas pay in zones penetrated by Gehem-1. Beneath those zones, 55 ft of net oil pay was discovered in a single zone. Gehem-2 was drilled in 6,036 ft of water to 17,505 ft TVD. The well is 1.8 miles south of the Gehem-1 well on the Ganal PSC area.
Unocal next will drill a deep test on the Gula structure, a large anticline immediately south of Gehem on the Ganal PSC. Following Gula, the company plans to drill a third Gehem well in the second quarter to appraise the northwestern flank of the Gehem structure.
Unocal Ganal, operator of the Ganal PSC area, holds an 80% working interest. ENI SPA subsidiary ENI-Ganal Ltd. holds the remaining 20%.
