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通过薄片镜下鉴定 ,并借助于扫描电镜、X -衍射等资料 ,对该区中部含油组合砂岩储层进行了岩石学、成岩作用及孔隙成因研究 .研究区段主要发育长石质岩屑砂岩 ,岩屑砂岩和岩屑质长石砂岩 ,并有少量杂砂岩 ;成岩作用类型主要有压实、压溶、胶结、交代和溶解作用 ;成岩阶段为早成岩期的B亚期和晚成岩期的A亚期 ;孔隙类型主要是扩大原生粒间孔隙 ,由长石、岩屑直接溶解而成 ;高台子油层中上部孔隙最为发育 ,是良好的储油层
The lithology, diagenesis and the genesis of the pores were studied by thin - slice microscopy, scanning electron microscopy (SEM) and X - ray diffraction (XRD), etc. The lithostratigraphic lithofacies , Lithic sandstone and feldspathic feldspar sandstone, with a few of miscellaneous sandstone. The types of diagenesis mainly include compaction, pressure solution, cementation, metasomatism and dissolution. The diagenesis stage is B stage and late diagenetic stage in the early diagenetic stage Of the A sub-period; the pore types are mainly to expand the primary intergranular pores, from feldspar, cuttings directly dissolved; Gaotai oil layer in the upper most developed pores, is a good reservoir