| 基于应变角度分析N_2和CO_2对煤层透气性的影响 |
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| 引用本文： | 马强,李让.基于应变角度分析N_2和CO_2对煤层透气性的影响[J].辽宁工程技术大学学报(自然科学版),2010,29(2). |
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| 作者姓名： | 马强 李让 |
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| 作者单位： | 1. 中国矿业大学,资源与安全工程学院,北京,100083
2. 煤科总院,沈阳研究院检测中心,辽宁,抚顺,113122 |
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| 摘 要： | 为深入了解煤在注入提高煤层气产能的N2、CO2气体后,煤的应变及透气性系数的变化情况,采用实验的方法研究了注入N2、CO2气体后应变的变化及对透气性系数的影响。结果表明:煤对氮气的透气性系数最高,其次是甲烷,再次是二氧化碳。这与煤对二氧化碳的吸附能力最强,甲烷次之,氮气最弱是相一致的,然而,注入三种气体煤样所产生的应变变化比例与透气性变化比例却不尽一致。因此,从应变角度建立的对透气性系数影响的分析模型,对于注入N2、CO2后透气性系数变化的分析适用做进一步研究。
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| 关 键 词： | 应变 透气性系数 二氧化碳 氮气 |
Effect of N2 and CO2 injection on coal permeability due to stain |
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| MA Qiang,LI Rang.Effect of N2 and CO2 injection on coal permeability due to stain[J].Journal of Liaoning Technical University (Natural Science Edition),2010,29(2). |
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| Authors: | MA Qiang LI Rang |
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| Institution: | MA Qiang 1,LI Rang 2 (1.School of Resource and Safety Engineering,China University of Mining and Technology,Beijing 100083,China,2.Test Center of FushunBranch of China Coal Research Institute,Fushun 113122,China) |
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| Abstract: | This paper presents the results of a laboratory investigation carried out to determine the permeability of coal to different gases related to enhanced coalbed methane recovery (ECBM) operations by injection of carbon dioxide or nitrogen.Permeability to nitrogen was found to be the highest,followed by that to methane,and the lowest for CO2.This is in agreement with the fact that,of the three gases,nitrogen is the least sorptive while CO2 is the most sorptive in a coal-gas environment.However,the ratio of the... |
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| Keywords: | strain permeability nitrogen dioxide |
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