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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。
The Xujiahe Formation in Sichuan Basin is an important gas-tight layer in China. Compared with the conventional reservoirs, the micro-features of the tight reservoirs have a more obvious impact on the reservoir physical properties. Based on the observation and identification of the cast slab in the study area and the existing SEM scanning electron microscopy, X-ray diffraction and NMR analysis results, the influence of reservoir petrology, pore throats and diagenesis on reservoirs is discussed. In the reservoir physical properties to find out the factors. The study shows that cuticle feldspar sandstone and feldspar cuticle sandstone are the main types of rocks in the study area; poor physical properties and poor correlation between porosity and permeability; compaction and cementation are destructive diagenesis, erosion and rupture For the construction of diagenesis.