鄂尔多斯盆地靖安油田储层流动单元的分类方法

Classification of Jing′an oilfield reservoir flow unit in Ordos Basin

流动单元是在侧向上和垂向上连续的具有相同的影响流体流动特征参数的储层单元,是油田开发地质学中的重要研究内容.以靖安油田上三叠统延长组河流三角洲储层为例,在建立地质模型基础上,对8个表征流动单元的特征变量进行主成分分析共同度的降维处理,优选出砂厚、渗透率、变异系数、突进系数作为研究对象,对工区样品进行聚类分析,并引入动态参数γ,对储层进行综合评判,评价了流动单元的平面分布.认为对流动单元的研究要综合考虑高分辨率层序地层学、沉积地质学、构造地质学和生产动态等资料.

A flow unit is defined as a volume of reservoir rock that is continuous laterally and vertically and has similar averages of those rock properties affecting fluid flow, an importance research in oil exploitation. According to the data from the river delta reservoir of Yanchang Formation of the upper Triassic group of Jing＇an oilfield, in Ordos Basin and the geologic model ,8 variables of character description of flow unit are handled with lower dimension of communality of principal component analysis. The sand thickness, permeability, coefficient of variation and coefficient of dart are selected preferentially as reseach objects and cluster analysis as samples in region of interest. At the same time, dynamic parameter y, introduced and evaluated. The conclusion is that reseach stratigraphy, sedimentology and tectonics and production development management and the improvement of oil and reservoir and horizontal distribution of flow unit are about flow unit must be good resolution sequence data of oilfield. The research works for the oilfield gas recovery.