Petroleum Geology of Cepu Area, Central Java, Indonesia Northern

Jun 28th, 2015
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Petroleum Geology of Cepu Area, Central Java, Indonesia Northern part of Java area (East Java in this case) is a stable back arc basin. This condition resulted thick sedimentary deposit which had good hydrocarbon pot ential. Tectonic development occured in this area, marked by uplifting, faulting and folding as in present condition.

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Petroleum Geology of Cepu Area, Central Java, Indonesia Northern part of Java area (East Java in this case) is a stable back arc basin. This condition resulted thick sedimentary deposit which had good hydrocarbon pot ential. Tectonic development occured in this area, marked by uplifting, faulting and folding as in present condition. Fig.1 Profile of Nothern part of East Java Basin II.1. Regional Geomorphology of Cepu Area II.1.1. Kendeng Zone Kendeng Zone is moutain range located in the north side of Ngawi sub-zone, orien ted to west-east direction. This mountain range consist of deep marine sediment which had been faulted and folded intensively forming anticlinorium. North margi n is bordered by Randublatung Depresion, then south margin is bordered by volcan ic mountain (Solo Zone). This mountain lies from Ungaran Mountain on the west si de to Ngawi and Mojokerto Area. Rest of this mountain is still can be tracked un til subsurface on Madura strait. Fig. II.1 Phisiography of Central and East Java (Bemmelen) Kendeng Mountain on west part s wide is about 40 km, then become narrow to the eas t with length approximately 250 (de Genevreye & Samuel, 1972). Characteristic of Kendeng Zone is line of hills with low elevation, wavy hill morphology elevated on 50-200 m. This west-east lineament reflects some folding and faulting trendi ng west-east. Folding and thrusting intensity in this mountain have big intensit y in west part and become weak in east part. Thrust fault make the unit

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