More oil and gas found in deep water offshore East Kalimantan
July 15, 1998 Mobil Makassar and Unocal have discovered additional oil and gas in the Greater Merah Besar area, offshore East Kalimantan in Indonesia.
Two recent exploration wells, Hitam Besar-2 and Hijau Besar-3, confirmed the presence of significant oil and natural gas potential in the deepwater area of the Mahakam Delta which is covered by the Makassar Strait Production Sharing Contract (PSC).
The Hitam Besar-2 well, completed as an oil and gas discovery on May 6, 1998, was drilled in 1,973 feet of water to a depth of 9,565 feet and found 66 feet of net hydrocarbon pay. The Hijau Besar-3 well, which was completed as an oil and gas discovery in early July, 1998, was drilled in 2,250 feet of water to a total depth of 8,000 feet and found 34 feet of net gas pay.
Two deep side-track wells from the original hole found an additional 125 feet of net condensate rich gas pay and 16 feet of net oil pay in adjacent fault blocks.
Analysis continues on a deeper zone.
These two wells follow the
initial discovery well, Merah Besar-6, drilled in 1997.
A second rig has been brought in which will continue to appraise the Greater Merah Besar structure. Development plans for this area should be finalised later this year with the potential for production by 2001.
Based on the latest drilling information, the estimated gross resource potential in the Greater Merah Besar area, which is partly on Unocal's East Kalimantan PSC, is up to 190 mm barrels-of-oil equivalent. Gas from the project is expected to be processed at Pertamina's Bontang LNG facility.
"This drilling program has confirmed the existence of significant hydrocarbon resources in the deepwater area of the prolific Mahakam Delta, and advances in deepwater production technology make commercial development possible," said M.W. Scoggins, Mobil's President, International Exploration and Production.
"We are very encouraged by our early exploration success offshore East Kalimantan and several additional prospects have been identified on
the Makassar acreage, some potentially larger than Merah Besar. Our plans are to drill these prospects while appraising the Merah Besar field."
Working interest in the Makassar Strait PSC is 50 % Mobil and 50 % Unocal, the operator of the block. Mobil, additionally, has an agreement with Unocal for a 30 % interest in the Rapak block which is located to the north of and adjacent to the Makassar Strait PSC.
Rapak represents additional prospective acreage in the same hydrocarbon bearing trend as the Makassar block and presents Mobil with further opportunities for growth.
Mobil affiliates, under contractor agreements with Pertamina have working interests in 11 blocks in Indonesia.
In 1998, Mobil celebrates 100 years doing business in Indonesia, 30 years as a Production Sharing Contractor, 20 years as a producer of LNG (from the giant Arun gas field in Aceh province, north Sumatra) and 10 years as a producer of LPG.
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