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根据砂岩薄片、铸体薄片、扫描电镜、X-射线衍射等分析,采用定量计算方法,对安塞油田长101段储层成岩作用进行研究。研究表明:该区长101段储层砂体成分主要以长石砂岩为主,储层砂岩处于中成岩B期,早期的压实作用、多种矿物胶结作用是造成物性变差的2个重要成岩作用,而溶蚀作用,特别是浊沸石、长石的溶蚀是储层物性变好的重要成岩控制因素。结合成岩作用类型及定量表征将该区成岩相划分为5种类型,成岩相控制了高渗储层的分布。
The diagenesis of Chang 101 reservoir in Ansai Oilfield was studied by means of quantitative calculation based on the analysis of sandstone flake, cast thin slice, scanning electron microscope and X-ray diffraction. The results show that the composition of sandstone in reservoir 101 of this section is dominated by feldspar sandstone, and the reservoir sandstone is in the B stage of the diagenetic diagenesis. The early compaction and the mineralization of various minerals are two important factors causing the deterioration of physical properties Diagenesis, and dissolution, especially laumontite and feldspar, are important diagenetic controlling factors that make the reservoir properties better. According to diagenesis types and quantitative characterization, the diagenetic facies of this area are divided into five types. Diagenetic facies controls the distribution of high permeability reservoirs.