河北地质大学学报2025，Vol.48Issue(4)：55-62,8.DOI:10.13937/j.cnki.hbdzdxxb.2025.04.007
鄂尔多斯Q地区长8段成岩作用及储层致密化研究
Study on Diagenesis and Densification of Reservoir of Chang 8 in Q Area,Ordos
摘要
Abstract
By using geological data such as core,casting thin section and scanning electron microscope,diagenesis and densification of reservoir in the study area are analyzed,then the pore evolution is quantitatively analyzed,and the causes of reservoir densification are discussed.The results shows that:lithic arkose and feldspar lithic sandstone are mainly developed in the study area,intergranular pores are relatively developed,followed by feldspar dissolved pores.The reservoir experienced a series of diagenesis such as compaction,cementation and dissolution.The physical property of underwater distributary channel microfacies reservoir are the best and that of distributary bay microfacies reservoir is the worst.The content ofdiagenetic minerals also has a certain impact on the quality of reservoir.The higher the content of rigid minerals,the better the physical properties of reservoir.The average primary porosity of the reservoir in the study area is 41.7%,the average pore reduction of compaction is 23.38%,the average pore reduction of cementation is 12.56%,and the average pore increase of dissolution is 2.82%.Cementation is the main reason for pore densification,and dissolution is the main factor for reservoir improvement.关键词
长8段/储层特征/成岩作用/孔隙演化/致密因素Key words
Chang 8/reservoir characteristic/diagenesis/pore evolution/causes of reservoir densification分类
能源科技引用本文复制引用
徐欣,薛纯琦,王琪杰,马锦明,黄荣宾..鄂尔多斯Q地区长8段成岩作用及储层致密化研究[J].河北地质大学学报,2025,48(4):55-62,8.基金项目
陕西省教育厅科学研究计划项目(23JK0336) （23JK0336）
陕西交通职业技术学院校级课题(YJ23005) （YJ23005）
陕西省自然科学基础研究计划(2024JC-YBQN-0609) （2024JC-YBQN-0609）
陕西省"十四五"教育科学规划2024年度课题(SGH24Y3191) （SGH24Y3191）
