摘要
结合活性炭表面扩散系数计算原理，建立页岩气在纳米孔道中的流动方程。模拟结果表明：通道半径为0-8nm，通道中以吸附气的表面扩散为主，压力的影响可忽略不计；通道半径大于10nm时，表面扩散通量相对较少，压力的影响不可忽略；当通道半径高于50nm时，自由分子流动通量可以达到99％，压力是气体分子传输速度的主要影响因素。
This paper combines the activated carbon surface diffusion coefficient calculation principle with shale iso- thermal adsorption experiment to establish the shale gas diffusion model. Simulation tests show that when the radius of channel in 0 - 8 nm range, there exists mainly the surface diffusion of the adsorbed gas, and the influence of pressure can be ignored; when channel radius is wider than 10 nm, surface diffusion is relatively small, and pres- sure should not be neglected; when the channel is further than 50 nm, free molecular flow flux can reach 99% , so the pressure is the most influencing factors of gas molecules.
出处
《重庆科技学院学报（自然科学版）》
CAS
2016年第6期31-35,共5页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家自然科学基金项目"页岩气藏多重介质渗流机理与理论研究"(51374265)
重庆科技学院研究生科技创新计划项目"威远区块水平井产能模型研究"(YKJCX1620101)
关键词
等温吸附
扩散系统
表面扩散
单相流动模型
isothermal adsorption
diffusion system
surface diffusion
single phase flow model
