倾斜油藏二氧化碳驱油中的黏性指进分析  

Analysis of Viscous Fingering of CO_2 Flooding in Tilted Reservoirs

作　　者：苏玉亮[1] 吴春新[1] Su Yuliang Wu Chunxin 

机构地区：[1]中国石油大学华东石油工程学院,山东东营257061

出　　处：《石油钻探技术》2009年第5期93-96,共4页Petroleum Drilling Techniques

基　　金：国家重点基础研究发展计划(“973”计划)项目“注CO2提高原油采收率的多相多组分相态理论”(编号:2006CB705804)资助

摘　　要：针对倾斜油藏CO2驱油过程中的黏性指进问题,建立了CO2驱油黏性指进模型,并对其进行了求解。重点分析了CO2的特性、驱油速度、原油黏度、渗透率和沉积韵律对黏性指进的影响。研究结果表明:在驱油过程中,由于CO2的降黏作用,减缓了指进;随着驱油速度的增大,指进程度加重;随着渗透率的增大,指进程度减缓;反韵律地层较正韵律地层的指进程度严重;随着原油黏度的增大,指进程度加重。Considering the viscous fingering of CO2 displacement in tilted formations, a model of viscous fingering in CO2 flooding is built, and solution is obtained. This paper analyzes the influence of CO2, oil displacement velocity, crude oil viscosity, permeability, and sedimentary rhythm on viscous fingering. The results show that in the process of displacement, CO2 slows down viscous fingering as a result of the decreasing of oil viscosity; with the velocity of displacement increases, the degree of viscous fingering becomes more seriously; with the permeability increases, the degree of viscous fingering slowes down; compared with positive rhythm reservoirs, the degree of viscous fingering in the inverted layered reservoirs are more seriously; with the crude oil viscosity increases, the degree of viscous fingering becomes more seriously.

关 键 词：倾斜油藏 二氧化碳 黏性指进 物理模型 数学模型 

分 类 号：TE341[石油与天然气工程—油气田开发工程]