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为提高营8断块在开采后期采收率,解决4、5级断层认识不清、小层划分太粗、油层内部非均质程度及隔(夹)层认识不清等问题,本次研究通过地层精细对比、地震构造解释、沉积相分析等方法,结合实际生产情况,描述了目的层主力含油小层的砂体分布情况,分析研究了目的层砂层组沉积相及代表性主力小层沉积微相。结果显示河口坝微相及席状砂微相的储层,储量丰度高,物性好,开发后期剩余油仍非常可观,为进一步挖掘剩余油提供了有力的地质依据。
In order to improve the recovery rate of Ying 8 block in the late exploitation, solve the problems that the faults of Grade 4 and 5 are not well understood, the division of small layers is too thick, the degree of heterogeneity within the oil layers and the understanding of each layer are not clear, Based on the fine stratigraphic correlation, seismic tectonic interpretation and sedimentary facies analysis, combined with the actual production situation, the sand body distribution of the main oil-bearing small beds in the target layer is described. The sedimentary facies of the target sand layer and the representative main sub-layer Sedimentary microfacies. The results show that the reservoirs of the microfacies and the silty sand microfacies in the mouth bar are characterized by high reserves abundance and good physical properties. The residual oil in the later stage of development is still very impressive, which provides a powerful geological basis for further excavation of remaining oil.