文章基本信息

标题：APPARENT PERMEABILITY FOR SHALE GAS CONSIDERING ADSORPTION AND FLOW PATTERNS: TAKING THE LONGMAXI SHALE GAS RESERVOIR OF SICHUAN BASIN AS AN INSTANCE
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作者：Wexu She ; Junbin Chen ; Dazhong Ren 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2019
卷号：28
期号：12
页码：9186-9191
语种：English
出版社：PSP Publishing
摘要：The flow pattern is unique in a certain range of pore size divided by the Knudsen number. In order to characterize permeability of nano-pore in shale gas reservoir more accurately, and solve the issue of apparent permeability calculation, the formulas of nano-pore permeability are put forward considering the influence of adsorption gas and pore size distribution, taking the chang7 shale gas reservoir of of Ordos Basin as an instance. After the calculated results were compared and analyzed, the conclusions are obtained as follows: (1) Pore size is the main factor to determine the flow pattern; (2) There are three main flow pattern in the shale reservoirs nano-pore, slip flow, Fick diffusion and transition diffusion, meanwhile Darcy percolation and Knud- sen diffusion do not exist; (3) Flow pattern has great influence on apparent permeability and adsorption has a greater impact in a high pressure condition (greater than 20 MPa).
关键词：Shale gas;Apparent permeability;Nano-pore;Adsorption thickness