Study on Fluid-solid Coupling Mathematical Models and Numerical Simulation of Coal Containing Gas

被引：1
|
作者：
Xu Gang [1 ]
Hao Meng [1 ]
Jin Hongwei [1 ]
机构：
[1] Xian Univ Sci & Technol, Coll Safety Sci & Engn, Xian 710054, Shaanxi, Peoples R China
来源：
3RD INTERNATIONAL CONFERENCE ON ADVANCES IN ENERGY RESOURCES AND ENVIRONMENT ENGINEERING | 2018年 / 113卷
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1088/1755-1315/113/1/012138
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Based on coal seam gas migration theory under multi-physics field coupling effect, fluid-solid coupling model of coal seam gas was build using elastic mechanics, fluid mechanics in porous medium and effective stress principle. Gas seepage behavior under different original gas pressure was simulated. Results indicated that residual gas pressure, gas pressure gradient and gas low were bigger when original gas pressure was higher. Coal permeability distribution decreased exponentially when original gas pressure was lower than critical pressure. Coal permeability decreased rapidly first and then increased slowly when original pressure was higher than critical pressure.
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页数：6
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