论文成果

An Analytical Model for Real Gas Flow in Shale Nanopores with Non-Circular Cross-Section

摘要:An analytical model for gas transport in shale media is proposed on the basis of the linear superposition of convective flow and Knudsen diffusion, which is free of tangential momentum accommodation coefficient. The present model takes into the effect of pore shape and real gas, and is successfully validated against experimental data and Lattice-Boltzmann simulation results. Gas flow in noncircular nanopores can be accounted by a dimensionless geometry correction factor. In continuum-flow regime, pore shape has a relatively minor impact on gas transport capacity; the effect of pore shape on gas transport capacity enhances significantly with increasing rarefaction. Additionally, gas transport capacity is strongly dependent of average pore size and streamline tortuosity. We also show that the present model without using weighted factor can describe the variable contribution of convective flow and Knudsen diffusion to the total flow. As pressure and pore radius decrease, the number of molecule-wall collisions gradually predominates over the number of intermolecule collisions, and thus Knudsen diffusion contributes more to the total flow. The parameters in the present model can be determined from independent laboratory experiments. We have the confidence that the present model can provide some theoretical support in numerical simulation of shale gas production. (C) 2016 American Institute of Chemical Engineers

关键字:shale nanopores pore shape real gas Knudsen diffusion

ISSN号:0001-1541

卷、期、页:卷: 62 期: 8 页: 2893-2901

发表日期:2016-08-01

期刊分区(SCI为中科院分区):二区

收录情况:SCI(科学引文索引印刷版),ESI(基本科学指标数据库),EI(工程索引),SCIE(科学引文索引网络版)

发表期刊名称:AICHE JOURNAL

通讯作者:任文希

第一作者:李根生,田守嶒,盛茂,孔繁鑫

论文类型:期刊论文

论文概要:任文希,李根生,田守嶒,盛茂,孔繁鑫,An Analytical Model for Real Gas Flow in Shale Nanopores with Non-Circular Cross-Section,AICHE JOURNAL,2016,卷: 62 期: 8 页: 2893-2901

论文题目:An Analytical Model for Real Gas Flow in Shale Nanopores with Non-Circular Cross-Section