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研究首先从油藏纵向分布、平面分布、油源条件与运移、圈闭分析与油藏类型四个方面出发分析了志丹探区寨102区长4+5油藏的控制因素,认为油藏主要分布于长4+52小层,平面上砂体主要受三角洲平原分流河道微相控制自北向南覆盖整个井区;油源为长7烃源岩向上运移至长4+5油层;通过建立油藏剖面和刻画顶面构造,油藏类型为构造岩性油藏;依据油藏控制因素的研究成果,开展了有利区预测,预测具有开发潜力区域两处。
Based on the longitudinal distribution, plane distribution, oil source conditions and migration, trap analysis and reservoir types, the study first analyzes the controlling factors of Chang 4 + 5 reservoir in Zhidan Exploration Zones 102, The reservoirs are mainly distributed in the long 4 + 52 sublayer, and the sand body in the plane is mainly controlled by the distributary channel microfacies in the delta plain covering the whole well from north to south. The source rocks of the Chang 7 source rock migrate upward to the Chang 4 + 5 reservoir. By establishing a reservoir profile and depicting the top structure, the reservoir type is constructed of lithologic reservoirs. Based on the research results of reservoir control factors, favorable zone prediction is carried out and two areas with development potential are predicted.