地质与勘探2018，Vol.54Issue(1)：193-202,10.
鄂尔多斯盆地苏77、召51区块山23段储层成岩演化及成岩相研究
Diagenetic Evolution and Facies of the Shan23 Reservoir in Su 77 and Zhao 51 Blocks,Ordos Basin
摘要
Abstract
Taking the Shan23 reservoir in the blocks Su 77 and Zhao 51 of Ordos basin as an example,this work studied the basic characteristics of reservoirs,diagenesis types and intensity,diagenetic facies types and their planar distribution. Such research was based on logging and core data,experi-ments of casting(conventional) thin sections,scanning electron microscope,X-ray diffraction,and mercury intrusion porosimetry. The results show that the reservoir rocks are dominated by quartz sandstone and lithic quartz sandstone. The compositional maturity is high and textural maturity is low. The res-ervoir is now characterized by low-porosity and extremely low-permeability,with moderate to intense compaction,medium-strong cementation and in-tense dissolution,implying the phase B of middle diagenetic evolution. Four diagenetic facies were defined according to diagenesis intensity in terms of typical authigenic minerals and pore types. The advantageous sedimentary microfacies is closely related to the favorable diagenesis facies. The moderate compaction,weak quartz secondary enlargement,dissolution pore plus intergranular pore faces,which are distributed at point bars or the main sandy belts in channel sandbars,are most favorable diagenetic facies. The moderate compaction,medium to strong illite and kaolinite cementation,as well as interg-ranular and dissolution pore facies takes the second place.关键词
苏77、召51区块/山23段/成岩演化/成岩相/鄂尔多斯盆地Key words
Su 77 and Zhao 51 blocks/Shan23 reservoir/diagenetic evolution/diagenetic facies/Ordos basin分类
能源科技引用本文复制引用
王晓晨,罗静兰,李文厚,胡嫱..鄂尔多斯盆地苏77、召51区块山23段储层成岩演化及成岩相研究[J].地质与勘探,2018,54(1):193-202,10.基金项目
国家自然科学重点基金项目(编号:41330315)和中国地质调查局地质调查计划项目(编号:12120114009201)联合资助. （编号:41330315）
