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The Depositional System of Epiclastic Alluvial Fan in Oligocene Jatibarang Formation, North West Java Basin, Indonesia
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
North West Java Basin is well known as one of the most prolific oil and gas basin in Indonesia. The early knowledge about Jatibarang Formation was initiated during the exploration project in what is called now Jatibarang Field where series of volcanic related rocks: lithic tuff, basalt, conglomerates, and andesite were found coating the basement which given an idea that sedimentation only occurred during the volcanic eruption only. The recent data indicated that non-volcanic and epiclastic process were conducted within the area creating variety of depositional process through Oligocene and older period. Geometry of an alluvial fan with volcanic provenance was identified in Cemara Area using spectral decomposition process of the seismic data and validated with wellbore information (conventional core, well log and FMI data). This paper is giving a new perspective about how the depositional system during the syn-rift period and volcanism in Jatibarang Formation that never been revealed before.