APPARENT PERMEABILITY FOR SHALE GAS CONSIDERING ADSORPTION AND FLOW PATTERNS: TAKING THE LONGMAXI SHALE GAS RESERVOIR OF SICHUAN BASIN AS AN INSTANCE

被引：0
|
作者：
She, Wexu [1 ,2 ,3 ]
Chen, Junbin [2 ]
Ren, Dazhong [1 ,2 ]
Huang, Hai [2 ]
Wang, Weibo [4 ]
Ying, Li [2 ]
机构：
[1] Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian, Shannxi, Peoples R China
[2] Xian Shiyou Univ, Shaanxi Key Lab Adv Stimulat Technol Oil & Gas Re, Xian, Shannxi, Peoples R China
[3] PetroChina Changqing Oilfield Co, Gas Prod Plant 2, Xian, Shannxi, Peoples R China
[4] Shaanxi Yanchang Petr Grp Co Ltd, Res Inst, Xian, Shannxi, Peoples R China
来源：
FRESENIUS ENVIRONMENTAL BULLETIN | 2019年 / 28卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Shale gas; Apparent permeability; Nano-pore; Adsorption thickness;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
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 Knudsen 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).
引用
收藏
页码：9186 / 9191
页数：6
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