通过普通薄片、铸体薄片、扫描电镜、X-射线衍射分析，对昆北油田切6 井区E₁₊₂和E₃¹ 砂岩储层 成岩作用类型、演化阶段、演化序列及储层物性的影响因素进行了研究。结果表明：E₁₊₂ 和E₃¹ 砂岩处于中成岩阶段A 亚期的末期，成岩作用类型主要有压实作用、胶结作用、溶蚀作用、交代作用、破裂作用；较强 的压实作用、石英次生加大、方解石及硬石膏等矿物的胶结作用是使储层物性变差的重要因素；长石、岩 屑和方解石胶结物的溶蚀作用以及砂岩破裂作用使储层物性得到改善。

Based on the analysis of ordinary thin sections, cast thin sections, scanning electron microscope and X-ray diffraction, this paper studied the diagenesis types, evolutionary phase, evolutionary series and influencing factors of reservoir properties of E₁₊₂ and E₃¹ in Qie 6 well area ofKunbei Oilfield. The result shows that the sandstone of E₁₊₂ and E₃¹is in the late stage of middle diagenetic stage A, and the main diagenesis types are compaction, cementation, dissolution, metasomatism and cataclasis. The experienced compaction, quartz secondary enlargement and cementation of calcite and anhydrite are the main destructive factors of reservoir properties, while the dissolution of feldspar, detritus and calcite and cataclasis are the constructive factors of reservoir properties.1