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通过普通薄片、铸体薄片、X射线衍射、扫描电镜等多项测试方法,对鄂尔多斯盆地杏子川油田W区块长6储层的岩石学特征、孔隙结构、成岩作用进行分析与研究。结果表明:研究区长6储层岩性主要为细粒长石砂岩,颗粒分选性较好,胶结类型以接触式-孔隙式为主,少量镶嵌式胶结。储集空间类型以原生粒间孔、溶蚀粒间孔隙为主。砂岩储层成岩作用复杂,成岩现象丰富,对储集层物性影响显著。
The petrological characteristics, pore structure and diagenesis of Chang 6 reservoir in Block W, Xingzichuan Oil Field, Ordos Basin, are analyzed and researched by a number of testing methods, such as ordinary flake, cast slab, X-ray diffraction and scanning electron microscope. The results show that the lithology of Chang 6 reservoir is mainly fine-grained feldspathic sandstone with good particle separation. The type of cementation is mainly contact-pore type with a small amount of mosaic cementing. The type of reservoir space is dominated by primary intergranular pores and dissolved intergranular pores. Sandstone reservoirs have complicated diagenesis, diagenetic phenomena and significant impact on reservoir physical properties.