By the OGJ Online Staff
HOUSTON, Mar. 25 -- Unocal Corp. subsidiary Unocal Ganal Ltd. reported hefty natural gas and condensate flow rates from an appraisal well in the deepwater Gendalo-Gandang gas field complex off Indonesia, demonstrating greater hydrocarbon potential for the complex.
"The gas rates are impressive, but we are most encouraged by the high condensate rates tested from the appraisal well in the Gendalo field," said Charles R. Williamson, Unocal chairman and CEO. "The results demonstrate that this is a world class gas-condensate resource, which could supply gas to Indonesia's Bontang liquefied natural gas facilities by the end of the decade, and, more importantly, produce significant liquids even sooner."
The Gendalo-3 well was tested at a rate of 30 MMcfd of gas and 2,200 b/d of condensate from a single interval at a depth of 11,559-11,638 ft true vertical depth subsea (TVDS). The drill stem test had flowing tubing pressure of 4,114 psi through a 40/64-in. choke.
The well has an estimated potential production rate of 90 MMcfd of gas and 6,000 b/d of condensate, Unocal said.
The Gendalo-3 well encountered 102 ft of net pay. The well was drilled in 5,082 ft of water to TD at 13,070 ft TVDS. The well is 2.8 miles east of the Gendalo-1 discovery well in the central portion of Gendalo-Gandang field complex.
Another appraisal well, Gandang-2, was drilled in the northern portion of the complex. This well encountered 185 ft of net gas pay. The well was drilled to TD of 12,000 ft TVDS in 5,613 ft of water. The Gandang-2 well is 2.2 miles south of the Gandang-1 discovery well (OGJ Online, May 8, 2000).
Unocal estimates the gross resource potential for the Gendalo-Gandang complex is at least 2-2.5 tcf of gas, plus an associated 50-150 million bbl of condensate. Work to certify this resource and plan its development continues.
Unocal Ganal operates the Ganal production sharing contract area with 80% interest, while Lasmo Ganal Ltd., a subsidiary of Italian integrated company ENI SPA, holds 20%.
The production sharing contracts call for Unocal Indonesia and its affiliates, including Unocal Ganal, as contractors to Indonesia's state-owned Pertamina to be entitled to varying shares of the oil and gas produced from commercial discoveries.
