西安石油大学学报（自然科学版）2012，Vol.27Issue(1)：57-59,3.
低渗透储层中氮气的微尺度流动及其对渗流的影响
摘要
Abstract
The nonlinear seepage mechanism of gas in low-permeability reservoir is discussed by studying the micro-scale effect of gas flowing through the micro-sized pores in low-permeability reservoirs. The flow characteristics of gas( N2 ) in the micro-tubes of the diameter of 2.05 ~ 10.1μm are experimentally investigated. The results indicate that,the real flow rate in experiments is always greater than that predicted by the classic fluid mechanics theory,which is called as the micro-scale flow effect of gas,and that,the less the diameter of the micro-tubes and the flow pressure, the stronger the micro-scale flow effect of gas, or the greater the difference between the real flow rate and the predicted flow rate. The influence of the micro-scale flow effect on the seepage of gas in low-permeability reservoir was studied based on the micro-tube experiment data and capillary bundle model. It is shown that,the seepage of gas in low-permeability porous media is nonlinear when the micro-scale flow effect of gas is considered. The apparent permeability of gas in low-permeability reservoir increases with the decrease of gas flow pressure, which becomes more obvious when the mean diameter of pores and throats in the porous media becomes small.关键词
低渗透储层/气体渗流/非线性渗流/微尺度流动/毛管束模型Key words
low-permeability reservoir/gas seepage characteristic/nonlinear seepage/micro-scale flow/capillary bundle model分类
能源科技引用本文复制引用
王斐,岳湘安,庞宏伟,王雯靓..低渗透储层中氮气的微尺度流动及其对渗流的影响[J].西安石油大学学报（自然科学版）,2012,27(1):57-59,3.基金项目
国家973计划项目"温室气体提高石油采收率的资源化利用及地下埋存"子课题:CO2驱替过程中多相多组分非线性渗流机理和规律(编号:2006CB705805) （编号:2006CB705805）
