Zhou Zengyuan, Peng Wenxu, Sun Hefeng, Fu Xiaowei, Zhu Weilin
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China.
Center for Marine Resources, Tongji University, Shanghai, 200092, China.
Sci Rep. 2024 Aug 12;14(1):18737. doi: 10.1038/s41598-024-69831-4.
The West Java Basin is a typical back-arc basin in Southeast Asia and one of Indonesia's main petroleum provinces. In the past ten years, it has been found that the new hydrocarbon reserves are on the rise, and a amount of resources to be discovered is significant. The distribution of hydrocarbon resources and the tectonic evolution characteristics of the basin are systematically explored, and the differences in hydrocarbon distribution and its main controlling factors in the back-arc basin of West Java are analyzed. The uneven distribution pattern of hydrocarbon is mainly controlled by the differential distribution of source rocks in the subsidence period. The distribution of the main source rocks is influenced by the "three-stage" tectonic development process that governs the distribution of sedimentary facies in various sedimentary environments throughout the tectonic subsidence period. Second, the weakening of the crust and magmatism facilitates the production of high heat flow values in the shallow strata of the back-arc area, thereby accelerating the pyrolysis and hydrocarbon generation of source rocks. The study delineates the formation and distribution of various types of oil and gas across various blocks. Prospective basin exploration sites include the shallow-deep water zones in the basin's south-central sector, as well as underexplored terrestrial regions. The exploration history and hydrocarbon resources identified within the West Java back-arc basin support these findings.
西爪哇盆地是东南亚典型的弧后盆地，也是印度尼西亚主要的石油产区之一。在过去十年中，已发现新的油气储量不断增加，待发现的资源量巨大。系统地勘探了该盆地的油气资源分布和构造演化特征，分析了西爪哇弧后盆地油气分布差异及其主要控制因素。油气分布不均衡格局主要受沉降期烃源岩差异分布控制。主要烃源岩的分布受“三阶段”构造发育过程影响，该过程在整个构造沉降期控制着不同沉积环境下的沉积相分布。其次，地壳弱化和岩浆活动促使弧后区域浅部地层产生高热流值，从而加速烃源岩的热解和油气生成。该研究描绘了各区块各类油气的形成与分布。盆地勘探的潜在区域包括盆地中南部的深浅水区以及勘探程度较低的陆地区域。西爪哇弧后盆地内的勘探历史及已确定的油气资源支持了这些发现。
