苏里格西盒8段致密砂岩储层孔隙结构特征

发布时间：2018-07-17 20:47

【摘要】：通过CT扫描、压汞实验、稳定法气-水相渗透率实验、核磁共振等技术,研究了苏里格西区盒8段储层的孔隙结构。研究表明:(1)岩屑石英砂岩孔隙类型主要为粒内溶孔、粒间溶孔、高岭石晶间微孔,岩屑砂岩的孔隙类型以岩屑内溶孔、黏土内晶间微孔为主,岩屑砂岩的喉道常常被黏土充填,导致岩屑砂岩孔隙的连通性变差;(2)无论是岩屑石英砂岩还是岩屑砂岩,排驱压力都较高,表明孔隙结构十分复杂,但岩屑石英砂岩的孔隙结构明显优于岩屑砂岩;(3)岩屑砂岩束缚水饱和度高于岩屑石英砂岩,说明岩屑石英砂岩的渗透能力好于岩屑砂岩。
[Abstract]:By means of CT scanning, mercury injection test, gas-water phase permeability test by stable method and nuclear magnetic resonance (NMR) technique, the pore structure of the 8 member reservoir in the western part of Sulige is studied. The results show that: (1) the pore types of lithic quartz sandstone are mainly intragranular dissolved pore, intergranular dissolved pore, kaolin-based Shi Jing micropore, lithic sandstone pore type is mainly lithic intergranular pore and clay intergranular micropore, the throat of lithic sandstone is often filled with clay. (2) both lithic quartz sandstone and lithic sandstone have high displacement pressure, which indicates that the pore structure is very complex. However, the pore structure of lithic quartz sandstone is obviously superior to that of lithic sandstone; (3) the irreducible water saturation of lithic sandstone is higher than that of lithic quartz sandstone, which indicates that the permeability of lithic quartz sandstone is better than that of lithic sandstone.
【作者单位】：成都理工大学能源学院;成都理工大学"油气藏地质及开发工程"国家重点实验室;
【基金】：国家自然科学基金(41302115) 四川省教育厅重点项目(16ZA0089) 成都理工大学校级科研团队资助项目(KYTD201401);成都理工大学中青年骨干教师培养计划项目(JXGG201403)
【分类号】：TE311

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