西安石油大学学报（自然科学版）2018，Vol.33Issue(3)：29-36,8.DOI:10.3969/j.issn.1673-064X.2018.03.005
考虑表面扩散的页岩气藏多级压裂水平井数值模拟
Numerical Simulation of Multi-stage Fracturing Horizontal Well in Shale Gas Reservoir Considering Surface Diffusion
摘要
Abstract
The seepage model of shale gas in matrix pore was established based on the seepage mechanisms of shale gas,including viscous flow,Knudsen diffusion,and the surface diffusion and desorption of adsorbed gas.Based on this,the seepage model of a multi-stage fracturing horizontal well in shale gas reservoir was established,in which the SRV zone composed of matrix,induced fractures and hygrabendraulic fractures and the USRV zone only composed of matrix are included.The model was solved by using the embedded discrete fracgrabenture model and the quasi Newton iteration method,the pressure distribution and the cumulative shale gas production of the shale gas horizontal well were obtained,and the sensitivity of parameters is analyzed.The research shows that the surface diffusion of adsorbed gas in nano-pores is the main seepage mechanism of shale gas,and the smaller the pore radius,the greater the effect of the surface diffusion of adsorbed gas on the cumulative production of shale gas well.关键词
页岩气/渗流机理/吸附气/表面扩散Key words
shale gas/seepage mechnism/absorbed gas/surface diffusion分类
能源科技引用本文复制引用
吴明录,丁明才,姚军,徐思南,李轩..考虑表面扩散的页岩气藏多级压裂水平井数值模拟[J].西安石油大学学报（自然科学版）,2018,33(3):29-36,8.基金项目
长江学者和创新团队发展计划资助项目(IRT1294) （IRT1294）
国家高技术研究发展计划(863计划)资助项目(2013AA09A215) （863计划）
