河北工业科技2018，Vol.35Issue(4)：231-236,6.DOI:10.7535/hbgykj.2018yx04001
基于流管法的面积波及效率计算方法研究
Calculation methods of areal sweep efficiency based on stream-tube method
摘要
Abstract
Most of the develope d oilfields in China have been in high water cut stage or high recovery stage after many years of encryption adjustment and water injection development.The mining and stable yield become more and more difficult.There-fore,it is of great significance to study the area sweep coefficient.On the basis of the characteristics of water flooding oil fields, based on the basic theory of stream-tube model,a five-spot well pattern is constructed.The Beckley-Leverett equation combing with element analysis and flow line integral method is used to deduce the areal sweep efficiency equation of the five-spot well pattern,and the equation is given.The curves of area sweep coefficient and oil recovery versus time are plotted and analyzed. The results show that before water breakthrough,injected water evenly spreads,and oil recovery and sweep efficiency linearly increase;after water breakthrough in the main stream tube,the increase of sweep efficiency is slower and finally getting gentle. After all the stream tubes are broke through,the effect of water injection for enhancing recovery is very weak,and the water flooding efficiency will decrease obviously.The research result provides reference for the solution of areal sweep efficiency of low permeability reservoir and the study of water flooding dynamic development.关键词
渗流力学/流管法/面积波及效率/水驱动态开发/流线积分法Key words
mechanics of flow through porous media/stream-tube method/areal sweep efficiency/water flooding/flow line integral method分类
能源科技引用本文复制引用
邢翠巧,尹洪军,李兴科,刘岢鑫,付京..基于流管法的面积波及效率计算方法研究[J].河北工业科技,2018,35(4):231-236,6.基金项目
国家科技重大专项(2017ZX05071005) （2017ZX05071005）
黑龙江省自然科学基金(E2016015) （E2016015）
