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通过取心井的岩心观察和室内分析，结合沉积微相的研究，探讨了临盘油田沙二下亚段成岩作用特点，建立了滩坝沉积的埋藏成岩演化模式．通过研究认为，尽管沙二下亚段埋藏较浅，但成岩作用已达到晚成岩Ａ１期，储层总体上处于弱压实、弱胶结状态，次生孔隙较发育．由于沉积和成岩作用的共同影响，处于原始高位的坝顶砂岩为较好的油气储层．
Based on the core observation and indoor analysis of coring wells and the study of sedimentary microfacies, the characteristics of diagenesis of Shahe sub-section of Linpan oilfield are discussed, and the burial diagenetic evolution model of beach-dam deposition is established. According to the research, although diagenesis buried shallowly in the second member of Shahejie formation, the diagenesis has reached the late diagenetic stage A1, and the reservoir is generally weakly compacted and weakly cemented with secondary porosity developed. Due to the common influence of sedimentation and diagenesis, the dam top sandstone in the original high level is the better oil and gas reservoir.