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首页> 外文会议>Indonesian Petroleum Association Annual Convention v.1; 20031014-20031016; Jakarta; ID >GEOCHEMISTRY OF THE EAST JAVA BASIN: NEW OBSERVATIONS ON OIL GROUPING, GENETIC GAS TYPES AND TRENDS OF HYDROCARBON HABITATS
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GEOCHEMISTRY OF THE EAST JAVA BASIN: NEW OBSERVATIONS ON OIL GROUPING, GENETIC GAS TYPES AND TRENDS OF HYDROCARBON HABITATS

机译：东爪哇盆地的地球化学：关于烃类的油分，遗传气体类型和趋势的新观察

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Highly significant oil and gas accumulations have been discovered recently in the East Java Basin, turning the area into the "hottest spot" for hydrocarbon exploration in Indonesia. These discoveries, fortunately, are commensurate with the fast growing fuel consumption in the East Java Province. Accordingly, hydrocarbon exploration in the basin has been aggressively enhanced. Despite the recent significant discoveries, there are still many uncertainties concerning aspects of petroleum geochemistry in the basin. This paper summarizes a recent regional study of the geochemistry and habitat of oil and gas in the East Java Basin. It was envisioned that a better understanding of the basin's oil and gas geochemistry would aid exploration activity. During the study, geochemical data of oil, gas, and source samples comprising physical to molecular properties from around 100 wells and seeps of the onshore and offshore areas of the East Java Basin were interpreted using various geochemical crossplots and methods. The habitats of oil and gas are examined by synthesizing the results of geochemical evaluation with geologic framework of the basin. It is shown from the oil geochemistry study that most oils were derived from sub-oxic to oxic terrestrial to marginal marine source facies (class "D"). The Paleogene Ngimbang, Lower Kujung, and Lower Tuban shales and coals are the inferred source rocks for the oils. Offshore oils have a more terrestrial signature than those of onshore. The source of offshore oils is thought to have sourced by older sources than those of onshore. Based on gas geochemistry study, three genetic types of natural gases have been identified in the East Java Basin, they are: thermogenic, biogenic, and mixed thermo-biogenic gases. The thermogenic gases were sourced by the Paleogene sources, whereas the biogenic gases were sourced by the Miocene to Pleistocene Tawun to Lidah shales and coals. The study also evaluated the amount of CO_2 gas pollutant, identified areas with high CO_2 gas content, and investigated the origin of CO_2. Four trends of habitats are recognized: the Ngimbang, Kujung, Ngrayong, and Tawun-Mundu Trends. It is within these trends that hydrocarbon prospectivity of the East Java Province is situated.
机译：最近在东爪哇盆地发现了高度重要的油气藏，使该地区成为印度尼西亚油气勘探的“最热点”。幸运的是，这些发现与东爪哇省快速增长的油耗相当。因此，该盆地的油气勘探得到了积极的加强。尽管最近有重大发现，但该盆地的石油地球化学方面仍然存在许多不确定性。本文总结了近期对东爪哇盆地地球化学和油气生境的区域研究。可以预见，对该盆地的石油和天然气地球化学的更好的了解将有助于勘探活动。在研究过程中，使用各种地球化学交叉图和方法解释了东爪哇盆地陆上和近海地区约100口井和渗流的石油，天然气和源样品的地球化学数据，包括物理到分子的特性。通过将该盆地的地质框架与地球化学评价结果综合起来，对油气的生境进行了检查。石油地球化学研究表明，大多数石油来自亚含氧到含氧的陆地到边缘海洋源相（“ D”类）。古近纪的Ngimbang，Lower Kujung和Lower Tuban页岩和煤是推断出的油源岩。海上石油比陆上石油具有更大的陆地特征。人们认为，海上石油的来源是比陆上石油更老的来源。根据天然气地球化学研究，在东爪哇盆地已识别出三种天然气的遗传类型，分别是：热成因，生物成因和混合热生物成因。热成因气体来自古近纪资源，而生物成因气体来自中新世至更新世塔旺至利达页岩和煤。该研究还评估了CO_2气体污染物的量，确定了CO_2气体含量高的区域，并调查了CO_2的来源。栖息地有四种趋势：Ngimbang，Kujung，Ngrayong和Tawun-Mundu趋势。正是在这些趋势中，东爪哇省的油气远景才得以定位。

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