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通过岩心描述和分析,确定了扶余油层河控三角洲沉积体系,主要沉积微相为三角洲分流平原亚相、三角洲前缘亚相、前三角洲亚相是本区占主导地位的。通过沉积微相研究,为精细油藏描述打下坚地质实的基础。对研究区各小层沉积微相的时空展布特征进行了分析,讨论了沉积微相与含油性的关系,认为油气的聚集受沉积微相的控制:水下分流河道的储集性能最好,河口坝次之,远砂坝较差,为油田开发方案的调整和动态分析提供了可靠的地质依据。
Through core description and analysis, the river sedimentary system of Fuyu reservoir was identified. The main sedimentary microfacies are subfacies of delta distributary plain and delta front. The subfacies of the former delta are dominant in this area. Through the study of sedimentary microfacies, laying a solid foundation for the fine reservoir description. The spatial and temporal distribution characteristics of sedimentary microfacies of each small layer in the study area are analyzed, and the relationship between sedimentary microfacies and oiliness is discussed. It is believed that the accumulation of oil and gas is controlled by sedimentary microfacies: the reservoir performance of underwater distributary channel is the best , Followed by the estuary dam and the far sand dam. This provides a reliable geological basis for the adjustment and dynamic analysis of the oilfield development plan.