论文部分内容阅读
运用综合地质研究方法,从沉积微相类型及分布特征、储层砂体主要成岩作用、储层砂体物性等方面综合研究了鄂尔多斯盆地城壕地区长3油层组储层砂体特征。结果表明:长3储层砂体主要为水下分流河道和河口坝砂体;储层属低孔、特低渗储集体。储层影响因素为沉积微相类型、平面分布以及储层砂体厚度和成岩作用。研究区水下分流河道储集体物性略好于河口坝,并且其分布面积大,是研究区的主要储层砂体,砂体厚度越大储层物性越好;对储层破坏性成岩作用为机械压实作用和胶结作用,建设性成岩作用为溶蚀作用和高岭石的交代作用。
Based on the comprehensive geologic research methods, the characteristics of reservoir sandstone in Chang 3 reservoir of Chenghao area in Ordos Basin are comprehensively studied from the aspects of sedimentary microfacies and their distribution characteristics, the main diagenesis of reservoir sandstone and the physical properties of reservoir sandstones. The results show that the sand body of Chang 3 reservoir is mainly composed of underwater distributary channel and estuary dam sand body; the reservoir belongs to low porosity and ultra low permeability reservoir. The influencing factors of reservoir are sedimentary microfacies type, plane distribution, reservoir sandbody thickness and diagenesis. The physical properties of underwater distributary channel reservoirs in the study area are slightly better than those in estuarine dams, and their distribution area is large, which is the main reservoir sand body in the study area. The larger the sand body thickness, the better the reservoir physical properties; the destructive diagenesis of the reservoir is Mechanical compaction and cementation, the construction of diagenesis for the dissolution and kaolinite interchange role.