鄂尔多斯盆地东部山西组山2段胶结物特征及其对储层物性的影响

发布时间：2018-05-12 14:49

本文选题：鄂尔多斯盆地东部 + 山西组山段　；参考：《地质科技情报》2017年02期

【摘要】：鄂尔多斯盆地东部山西组山2段是天然气勘探的重点层位,山西组山2段具有较强的非均质性,胶结物是影响非均质性的主要因素,因此开展山2段胶结物特征及其对储层物性影响的研究具有重要意义。通过铸体薄片、扫描电镜、荧光薄片、阴极发光和X衍射黏土矿物分析等测试手段对山西组山2段胶结物特征及其对储层物性的影响进行了研究。结果表明:研究区山2段储层胶结物主要为伊利石、碳酸盐胶结物、硅质胶结物、高岭石;通过对胶结物特征和与储层物性的关系研究,发现高岭石和少量的硅质胶结物是储层物性的有利因素,伊利石、碳酸盐胶结物及较多含量的硅质胶结物使储层致密化,对储层孔隙发育不利。
[Abstract]:The Shan2 member of Shanxi formation in eastern Ordos Basin is the key layer of natural gas exploration, and the second member of Shanxi formation has strong heterogeneity, and the cementation is the main factor affecting the heterogeneity. Therefore, it is of great significance to study the characteristics of cemented matter and its influence on reservoir physical properties. The characteristics of cementation and its influence on reservoir properties in Shanxi formation were studied by means of casting thin plate, scanning electron microscope, fluorescence thin sheet, catholuminescence and X-ray diffraction clay mineral analysis. The results show that the cementation of the second member of the mountain reservoir is mainly Illite, carbonate cement, siliceous cementation and kaolinite, and the relationship between the cementation characteristics and reservoir physical properties is studied. It is found that kaolinite and a small amount of siliceous cementation are favorable factors for reservoir physical properties. Illite, carbonate cementation and siliceous cementation make the reservoir dense, which is unfavorable to the development of reservoir pores.
【作者单位】：西北大学大陆动力学国家重点实验室;西北大学地质学系;
【基金】：国家自然科学基金重大项目(41390451)
【分类号】：P618.13

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