Indonesia Oil & Gas Fields - Java.

There are numerous oil and gas fields in West Java and the adjacent Java Sea, including the major oilfield of Ardjuna discovered in 1969 by Arco (by the mid-1980s producing almost 183,000 b/d of 37 deg. API oil) and smaller oilfields like Arimbi (found in 1972). The oilfields in West Java and its offshore are reservoired in clastic and carbonate rocks and in fractured volcanics. Recent gas discoveries are the result of active exploration to satisfy growing local demand, including the Jati Sempurna field which is 3 km outside Jakarta. Following earlier disappointment in the East Java Sea, substantial gas reserves were in 1989 in the Madura Strait by Mobil, which has developed them for supply to the market on Java island. Lasmo has been its partner in the field. In West Madura gas is produced by a JV of Gunanusa Utama Fabricators, an Indonesian gas E&P company, and Kodeco Energy of South Korea. The output, over 50 MCF/day, is supplied to the local market. Arco Bali North has developed the Pagerungan gas field and nearby structures, which Arco discovered in 1985 in East Java's offshore north-east of Bali. Gas production began in March 1993 and reached 400 MCF/day in 1995. Arco's partner in this is BP (36%), with the US major holding 54%. After Suharto's May 1998 downfall, Arco bought a 10% stake from Bimantara group which is owned by a Suharto son. The gas is supplied by a 430-km marine/land pipeline to East Java's power system of the state power utility PLN and a local gas distribution unit of the state's PGN. Arco has the offshore "Area A" licence in North-West Java, where in July 1995 it discovered an oil and gas field 8 km east of Jakarta. The wildcat, PSI KKN- 1, was drilled to a total depth of 2,116 metres in 16 metres of water some 5 km east/north-east of Arco's November 1988 discovery of PSI KK-2. Tests yielded 1,151 b/d of oil, 22.7 MCF/ day of gas and 848 b/d of condensate from a Middle Miocene "Main-Massive" section. Equity in this area is split by Arco (46%), Maxus (24.27%), Repsol (12.45%), Inpex (7.25%), Deminex (5%), Itochu (2.58%) and Warrior (2.45%). Lapindo Brantas Inc., of the local Bakrie Brothers, operates the onshore Brantas PSC block in East Java. Its 50% partner there is Novus Petroleum of Australia. Lapindo has developing the Wunut gasfield on this block. The first phase cost about $30m and was put on stream in 1998 to supply that East Java region with 105 BCF of gas over 15 years.