摘要
四川盆地须家河组是我国重要的致密气产层,与常规储层相比,致密储层的微观特征对储层物性的影响更为明显。通过对研究区铸体薄片观察鉴定,结合现有的SEM扫描电镜、X衍射以及核磁共振等技术分析结果,对储层岩石学特征、孔隙喉道及成岩作用对储层的影响进行讨论,旨在找出储层物性的影响因素。研究认为,岩屑长石砂岩和长石岩屑砂岩为研究区的主要岩石类型;物性较差,孔渗之间相关性不强;压实和胶结作用为破坏性成岩作用,溶蚀和破裂作用为建设性成岩作用。
Xujiahe formation in Siehuan basin is an important gas producing layer in China. Compared with conventional reservoirs, the microscopic characteristics of the tight reservoir have more important effect to the reservoir physical properties. According to the result of casting thin observation, SEM scanning electron microscope, X-ray, and nuclear magnetic resonance in the study area, petrologic characteristics, throat and diagenesis of the reservoir were studied to investigate influencing factors of reservoir physical properties. The results show that, lithic arkose and feldspathic litharenite are main rock types; physical properties are poor, the correlation between porosity and permeability is not strong. Compaction and cementation are the main destructive diagenesises, the constructive diagenesises include dissolution and cataclasis.
出处
《辽宁化工》
CAS
2015年第7期859-861,共3页
Liaoning Chemical Industry
关键词
四川盆地
须家河组
储层特征
成岩作用
Sichuan basin
Xujiahe formation
reservoir characteristic
diagenesis
