2025年5月13日 星期二
岩石力学与工程学报  2024, Vol. 43 Issue (12): 3044-3057    
  学术论文 本期目录 | 过刊浏览 | 高级检索 |
热–流–固耦合作用下含水煤层渗透率模型建立及应用研究
肖智勇1,王 刚2,刘 杰1,邓华锋1,姜 枫3,郑程程3
(1. 三峡大学 三峡库区地质灾害教育部重点试验室,湖北 宜昌 443002;2. 福建理工大学 土木工程学院,福建 福州 350118; 3. 山东科技大学 山东省土木工程防灾减灾重点实验室,山东 青岛 266590)
A permeability model of water-bearing coal seams under thermo-hydro-mechanical coupling effect and its application
XIAO Zhiyong1,WANG Gang2,LIU Jie1,DENG Huafeng1,JIANG Feng3,ZHENG Chengcheng3
(1. Key Laboratory of Geological Hazards in Three Gorges Reservoir Area,Ministry of Education,China Three Gorges University,Yichang,Hubei 443002,China;2. School of Civil Engineering,Fujian University of Technology, Fuzhou,Fujian 350118,China;3. Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandon University of Science and Technology,Qingdao,Shandong 266590,China)
全文: PDF (1134 KB)   HTML (0 KB) 
输出: BibTeX | EndNote (RIS)      
摘要 了解注CO2开采煤层气过程煤层内的气体流动规律对煤层气的高效开采和缓解温室效应具有重要意义。现有研究在建立煤层内渗透率模型时往往忽略了水和温度的影响,为此,建立一个新的耦合温度场–渗流场–固体力学场的模型对煤层中的气体流动规律进行研究。该模型考虑注CO2引起的气–水两元两相流、水对气体吸附性能的衰减、气体非平衡流动以及热传递和热传导作用。将建立的模型应用于沁水盆地的注CO2增采煤层气项目,数值分析煤层中气体的流动情况。研究结果表明:(1) CH4压力和水压经历三个阶段的变化,CO2压力呈现一直增加的趋势;(2) 储层注入井附近温度在开采达到一定时间后变化速率与生产井附近相同;(3) 渗透率经历3个阶段的变化,且每个阶段的控制因素不同;(4) CH4产量和CO2储量持续增加,CH4产率在出现峰值后下降,而CO2储率则一直下降。研究结果对于多物理场耦合作用下煤层内的气体流动规律认识具有一定的理论价值。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
肖智勇1
王 刚2
刘 杰1
邓华锋1
姜 枫3
郑程程3
关键词 采矿工程气体流动多物理场吸附膨胀CO2-ECBM    
Abstract:Understanding the behavior of gas flow within coal seams during CO2 injection for coalbed methane recovery is essential for the efficient recovery of coalbed methane and the mitigation of the greenhouse effect. Previous studies have often neglected the impacts of water and temperature in permeability modeling within coal seams. Consequently,a novel permeability model that integrates thermo-hydro-mechanical fields has been developed to investigate the gas flow in coal seams. This proposed model accommodates the gas-water two-element two-phase flow resulting from CO2 injection,incorporating the reduction in gas adsorption capacity due to the presence of water presence,non-equilibrium gas flow,and the influences of heat transfer and conduction. The established model was applied to a CO2-Enhanced Coalbed Methane(CO2-ECBM) project in the Qinshui Basin to conduct a numerical analysis of gas flow within coal seams. The results show that:(1) CH4 and water pressure experience three stages,whereas CO2 pressure consistently exhibits an increasing trend. (2) Temperatures near reservoir injection wells change at the same rate as near production wells after a certain time of recovery. (3) Permeability progresses through three stages,each governed by different controlling factors. (4) Both CH4 production and CO2 storage persist in increasing,although the rate of CH4 production declines following a peak,whereas the rate of CO2 storage continues to decline. The results have some theoretical significance for the understanding of gas flow laws within coal seams under the multi-physical fields.
Key wordsmining engineering    gas flow    multi-field    water    adsorption swelling    CO2-ECBM
    
引用本文:   
肖智勇1,王 刚2,刘 杰1,邓华锋1,姜 枫3,郑程程3. 热–流–固耦合作用下含水煤层渗透率模型建立及应用研究[J]. 岩石力学与工程学报, 2024, 43(12): 3044-3057.
XIAO Zhiyong1,WANG Gang2,LIU Jie1,DENG Huafeng1,JIANG Feng3,ZHENG Chengcheng3. A permeability model of water-bearing coal seams under thermo-hydro-mechanical coupling effect and its application. , 2024, 43(12): 3044-3057.
链接本文:  
https://rockmech.whrsm.ac.cn/CN/Y2024/V43/I12/3044
版权所有 © 2005-2016 《岩石力学与工程学报》编辑部
   主办单位:中国岩石力学与工程学会 出版单位:科学出版社
地址:湖北省武汉市武昌小洪山(邮编:430071) 电话:(027)87199250 传真:(027)87199250 E-mail: rock@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发  技术支持:010-82358270,E-mail: support@magtech.com.cn
鄂公网安备 42010602003581号