淮北煤田祁东煤矿煤层气含量与组分特征及影响因素分析  

Analysis of Content, Component Characteristics and Influence Factors of Coalbed Methane of Qidong Coalmine in the Huaibei Coalfield

作　　者：侯岩波[1] 

机构地区：[1]中联煤层气有限责任公司,北京

出　　处：《自然科学》2024年第4期684-693,共10页Open Journal of Nature Science

摘　　要：为探究地质因素对煤层气含量和地球化学特征的影响,以淮北煤田祁东煤矿为研究对象,采用现场解吸法和色谱–质谱法分别对研究区3-2、8-2和9号煤储层含气量和煤层气组分进行了分析。结果表明:3-2煤层含气量为2.41~9.42 m3/t,CH4含量为72.07%~94.69%,CO2为1.93%~6.42%,N2为0.4%~21.73%;8-2煤层含气量为1.39~12.19 m3/t,CH4含量为74.19%~96.67%,CO2为2.6%~8.16%,N2为0.15%~ 30.48%;9煤层含气量为6.56~13.84 m3/t,CH4含量为75.88%~96.42%,CO2为0.6%~7.2%,N2为0.46%~17.41%。9煤层含气量与水分和灰分呈弱相关关系,但CH4浓度几乎不受煤质特征影响。另外,8-2煤层含气量和CH4含量与埋深呈正相关关系,N2和CO2含量与埋深呈负相关关系。In order to explore the influence of geological factors on content and component of coalbed methane (CBM), the Qidong coalmine of the Huaibei Coalfield was used as the research object, and the desorption method and chromatography-mass spectrometry method were used to analyze the gas content and CBM components of No. 3-2, No. 8-2 and No. 9 CBM reservoirs, respectively. The results show that the gas content of the No. 3-2 CBM reservoir is 2.41~9.42 m3/t, the CH4 concentration is 72.07%~ 94.69%, the CO2 concentration is 1.93%~6.42%, and the N2 concentration is 0.4%~21.73%;The gas content of the No. 8-2 CBM reservoir is 1.39~12.19 m3/t, the CH4 concentration is in the range of 74.19% to 96.67%, CO2 concentration is 2.6%~8.16%, and N2 content ranges from 0.15% to 30.48%;The gas content of No. 9 CBM reservoir is 6.56~13.84 m3/t, with CH4 concentration ranging from 75.88% to 96.42%, CO2 concentration ranging from 0.6% to 7.2%, and N2 concentration ranging from 0.46% to 17.41%. The gas content of No. 9 CBM reservoir is weakly correlated with moisture and ash contents, whereas the CH4 concentration is almost unaffected by coal quality characteristics. In addition, gas content and CH4 concentration of the No. 8-2 CBM reservoir are positively correlated with buried depth, while N2 and CO2 concentrations are negatively correlated with buried depth.

关 键 词：祁东煤矿 含气量 组分特征 影响因素 

分 类 号：P61[天文地球—矿床学]