低渗透油田超前注水对开发效果的影响  

The impact of advanced water injection on the development effect in low permeability oil field

作　　者：张承丽[1] 宋国亮[2] 魏明国[3] 殷代印[1] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]东北石油大学数学科学与技术学院,黑龙江大庆163318 [3]大庆钻探工程公司钻井二公司,黑龙江大庆163413

出　　处：《大庆石油学院学报》2011年第3期45-49,54,共6页Journal of Daqing Petroleum Institute

基　　金：国家自然科学基金项目(51074034)

摘　　要：以朝阳沟油田长10区块为例,研究低渗透油田超前注水对脱气半径、原油黏度、无因次采液/采油指数、含水率、原油产量的影响;同时数值模拟超前注水对波及系数和采收率的影响.结果表明:超前注水减小脱气半径,有利于提高开发效果;超前注水使无因次采液/采油指数略有增加,含水率高于60%以后,无因次采液指数逐渐上升,最高达到1.3;超前注水后,相同采出程度情况下,含水率降低;实施超前注水后,如果平均地层压力从7.3 MPa升高到9.5 MPa,投产初期增产幅度为27.7%,提高采收率2.22%,有效动用系数增加0.079.Taking the 10th block in Chaoyanggou oilfield as an example,the impact of advanced water injection on degassing radius,viscosity of oil,dimensionless liquid/oil productivity index,water cut and crude production rate of low permeability oil field is investigated through theoretical method,the influence of advanced water injection on sweep efficiency and recovery ratio is studied with numerical simulation method.The results show that advanced water injection can decrease degassing radius,which is beneficial to development effect;advanced water injection can increase dimensionless liquid/oil productivity index slightly,which gradually increases when water cut is higher than 60%,the maximum of dimensionless liquid/oil productivity index can reach 1.3;the water cut decreases after advanced water injection under the condition of the same recovery degree;after advanced water injection,if average stratum pressure increases from 7.3 MPa to 9.5 MPa,the range of increased production is 27.7% during commissioning initial period,the recovery ratio can improve 2.22%,the valid coefficient put into operation can increase 0.079.

关 键 词：低渗透油田 启动压力梯度 超前注水 开发效果 脱气半径 波及系数 

分 类 号：TE348[石油与天然气工程—油气田开发工程]