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流动单元能够揭示储层的非均质性,指导剩余油预测和油田开发,在油田开发中后期其研究应该综合考虑多种储层参数。优选了有效厚度、渗透率、孔隙度、含油饱和度、净毛比等9个评价参数,运用模糊数学原理,构建了流动单元的模糊评价矩阵;求取评价矩阵的特征向量,以此作为各参数权重系数;利用加权平均算法,计算流动单元的综合评价指数,来定量划分储层流动单元。利用该方法对孤东油田七区西Ng52+3进行研究,其流动单元类型以E类和G类为主,M类占一定比例,P类鲜有发育,各类流动单元的物性差异大。在储层建筑结构指导下预测出七区西Ng52+3流动单元的空间分布:E类流动单元分布在侧积砂坝内,构成了七区西Ng52+3的“内核”;G类流动单元围绕E类流动单元展布,构成了七区西Ng52+3的“主体”;M类流动单元分布在废弃河道和天然堤内。
The flow unit can reveal the heterogeneity of the reservoir, guide the prediction of remaining oil and the development of the oilfield. In the middle and late stage of oilfield development, the study should consider a variety of reservoir parameters synthetically. Nine evaluation parameters such as effective thickness, permeability, porosity, oil saturation and net wool ratio were optimized and the fuzzy evaluation matrix of flow cell was constructed by fuzzy mathematics principle. The eigenvector of evaluation matrix was obtained as the Parameter weight coefficient; and using the weighted average algorithm to calculate the comprehensive evaluation index of the flow unit to quantitatively divide the flow unit in the reservoir. This method was used to study the west Ng52 + 3 in the Gudong area of Gudong oilfield. The main types of mobile units are E and G, M is a certain proportion, P is rarely developed, and the physical properties of all kinds of mobile units are greatly different. Under the guidance of the reservoir structure, the spatial distribution of Ng52 + 3 flow cells in the west of the 7th block is forecasted: the E type flow cells are distributed in the side-dams and constitute the “inner core” of the Ng52 + 3 in the 7th district; The flow units are distributed around the E-type flow units and form the “main body” of the Ng52 + 3 zone in the west of the seven zones. The M-type flow units are distributed in the abandoned river courses and the natural banks.