印度尼西亚西爪哇茂物县Cipamingkis河Jatiluhur组成岩作用研究

I. Aulia, R. Aditiyo
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引用次数: 0

摘要

Jatiluhur组的成岩作用研究相对较新,特别是在Cipamingkis河。该研究可提供贾蒂鲁呼尔组砂岩组分及特征等信息,为进一步研究提供依据,或为油气工业提供有用信息。对成岩作用的认识可能是影响储层,特别是砂岩储层质量的因素之一。本研究采用地表填图的方式进行数据采集,在Cipamingkis河的地层测量剖面中采集了55个岩石样品,路径长度为±2 Km。这些数据以沉积结构、结构和成分信息的形式呈现。对23份砂岩和2份石灰岩样品进行了岩相分析、x射线衍射(XRD)和扫描电镜(SEM)分析。研究发现,成岩作用主要以机械压实作用为主,压实作用以点接触、长接触、凹凸接触和缝合接触为主,而灰岩中生物碎屑具有脆性断裂特征。所发现的水泥以方解石的形式存在,石英和粘土矿物以高岭石、蒙脱石和伊利石的形式存在,而石灰岩则以块状和纤维状的形式存在,其中充满了方解石矿物。溶解发生在石英、长石和云母等矿物中。矿物替代通常出现在石英和长石矿物中。在灰岩中,存在粒间泥晶化。主要孔隙类型为粒间孔隙,平均占10.4%,分布在3 ~ 23%之间。贾提鲁湖组岩石成岩作用的历史始于初始的造岩沉积,接着是埋藏的中成岩作用,最后是造岩作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diagenesis Study of Jatiluhur Formation at Cipamingkis River, Bogor Regency, West Java, Indonesia
Diagenesis studies in the Jatiluhur Formation are still relatively new, especially in the Cipamingkis River. This research can provide information in the form of components and characteristics of sandstone in the Jatiluhur Formation which can be used as a basis for further research or useful information in the oil and gas industry. Knowledge of diagenetic could be one of the factors that affect in raservoir quality, espesially in sandstone. In this study, data collection was carried out through surface mapping, which is 55 rock samples were obtained from stratigraphic measuring section with a path length of ±2 Km in the Cipamingkis River. The data is in the form of information on sedimentarry structure, textures and composition. There were 23 sandstone and 2 limestone samples which were then subjected to petrographic analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results of study are several features of diagenesis were found including compaction that works in the form of point contact, long contact, concavo-convex contact and suture contact and dominated by mechanical compaction, while in limestone there is a brittle fracture feature in bioclasts. The cement found in the form of calcite cement, quartz and clay minerals that the form of kaolinite, smectite and illite, while the limestone is in the form of blocky and fibrous to bleded which is filled with calcite minerals. Dissolution occurs in the minerals of quartz, feldspar, and mica. The mineral replacement that is commonly found occurs in quartz and feldspar minerals. In limestone, there is an intergranular micritization. The dominant type of porosity found was interparticle with an average of 10.4% found between 3 – 23%. The history of diagenesis that occurs in rocks in the Jatiluhur Formation begins with the initial deposition of eogenesis, followed by burial mesogenesis and ends with telogenesis which reveals rocks on the surface.
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