基于层次分析方法对姬塬地区流动单元的研究

同一类流动单元，岩石物理性质、储集渗流能力类似，在开发动态上具有一致的渗流规律和水淹特征。为了进行姬塬地区特低渗砂岩储层流动单元研究，采用层次分析的思路，在精细小层对比、沉积微相研究、隔夹层与渗流屏障识别及连通体划分的基础上，运用多参数聚类分析方法，对研究区延长组长4+5²₂单砂层流动单元进行了划分。通过微观水驱油实验，刻画了不同类别流动单元孔隙结构、流体渗流及水驱油效率的差异性，从动态的角度验证了划分结果的合理性。研究认为:A类和B类流动单元具有砂体厚度大、储集系数、流动系数及流动带指数都较高的特点，砂岩物性好、连通性好、排驱压力低,水驱效率分别为65.7%和54.9%，是姬塬油田有利高产稳产区；C 类流动单元水驱效果差，为剩余油富集区，是油田后期挖潜的重点区域。

Study on Flow-Units Based on Hierarchical Analysis in Jiyuan Area,Ordos Basins

The same flow-units have the same properties of rocks and the flow-capacity,and consistent seepage and flood-out characteristics are similar in the development of the well.Using the view of analytic hierarchy,the flow-units of ultro-low permeability sandstone reservoir are divided basing on the work of single-sand-body contrasting,sedimentary micro-faces,inter-layer and seepage-barriers searching,and combining with the reservoir characteristics of low permeability sandstone.Using the method of multi-paramet...