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哈萨克斯坦某油田为三角洲平原沉积体系,储层纵向上多期叠置,砂体横向迁移变化快。以测井、取心井资料为基础,通过研究该区块砂体三维展布情况、砂体几何形态、储层沉积相、孔隙度和渗透率配置关系,系统的分析了储层的宏观非均质性。研究认为,各小层非均质程度各异,受沉积相控制,油藏砂体自东南向西北逐渐减薄,整体上储层非均质性中等偏强,主力含油小层非均质性强。
An oilfield in Kazakhstan is delta plain sedimentary system, reservoirs are superimposed longitudinally, and the lateral migration of sand bodies changes rapidly. Based on the data of well logging and coring well, this paper analyzes the relationship between the three-dimensional distribution of sand bodies in the block, the geometry of sand bodies, the sedimentary facies of sediments, the porosity and permeability, Homogeneity. The study shows that the heterogeneity of each sublayer is controlled by sedimentary facies, and the reservoir sand bodies are gradually thinned from southeast to northwest. On the whole, the reservoir heterogeneity is medium and strong, and the main oil-bearing small layer heterogeneity Strong.