考虑流体分布差异的无因次采液指数计算方法  

Dimensionless Fluid Productivity Index Calculation Considering Fluid Distribution Difference

作　　者：谷建伟 孔令瑾 刘志宏[2] 魏明[2] 

机构地区：[1]中国石油大学,山东青岛266580 [2]中石化胜利油田分公司,山东东营257015

出　　处：《特种油气藏》2015年第2期78-80,100,共4页Special Oil & Gas Reservoirs

基　　金：国家油气重大专项"整装油田特高含水期提高采收率技术"(2011ZX05011-002)

摘　　要：针对目前无因次采液指数计算方法没有考虑注采井间油水分布特征的问题,采用一维两相水驱油理论,考虑注采井间油水分布差异的影响,引入油水视黏度概念,运用积分方法计算油水视黏度,导出了考虑油水分布特征后的无因次采液指数的计算公式,该方法对准确评价高含水油藏开发效果有指导意义。实例计算表明,由于考虑了注采井间油水分布的影响,利用平均视黏度计算的无因次采液指数数值,在相同的含水条件下要高于目前常用方法计算的无因次采液指数,最大差异可达30%。The oil-water distribution between injection and production wells is not taken into consideration in present dimensionless fluid productivity calculation methods. Based on one-dimensional two-phase waterflooding theory and mathematical integration,oil-water apparent viscosity is introduced to deduce dimensionless fluid productivity index calculation formula considering oil-water distribution difference. This method is favorable to exactly evaluate the development of high water-cut reservoirs. Practical calculation demonstrates that due to the consideration of oil-water distribution difference between injection-production wells,the calculated dimensionless fluid productivity index by using average apparent viscosity is higher than that calculated by present methods,and the maximum differences can reach 30%.

关 键 词：油水分布 无因次采液指数 视黏度 含水率 

分 类 号：TE349[石油与天然气工程—油气田开发工程]