【摘要】 临盘-商河油田沙河街组三段上部砂岩,在埋藏过程中经历了未成熟期、半成熟期和成熟期三个阶段,各阶段的成岩作用及孔隙特征明显不同。成熟期是次生孔隙最发育的阶段,成为最重器的储集空间,分为粒间溶孔、粒内溶孔、铸模孔、微孔及裂隙五种类型,受物源沉积环境和构造活动控制。更多还原

【Abstract】 The sandstone diagenesis and pore evolution of the third member (upperpart) of the Shahejie Formation in Linpan and Shanghe Oil Fields heve beenstudied in this paper on the basis of observation and analysis of cores. thinsections, casting slices, SEM, X-ray diffraction and cathodoluminescence. Thestudy shows that the sandstone of the third member of the Shahejie Formationhave undergone immunature stage, semimature stage and mature stage. The dia-genesis and pore feature of different stages are obviously different, and the ma-ture stage is the phase of maximum development of secondary porosity. Thesecondary pores in this area involve five basical types, such as intergranularpores, intragranular pores, microporosity, moldic pores and fractures. Theyhave become the most important reservior spaces. The development of the secondary pore is mainly controlled by the proven-ance. depositional environment and tectonic movement.更多还原