煤岩显微组成对甲烷吸附能力的影响研究  

Study on Coal and Rock Maceral Composition Affected to Methane Adsorption Capacity

作　　者：李振涛[1] 姚艳斌[1,2] 周鸿璞[1] 白小虎[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]国家煤层气工程中心煤储层实验室,北京100083

出　　处：《煤炭科学技术》2012年第8期125-128,共4页Coal Science and Technology

基　　金：国家自然科学基金资助项目(41102099);国家科技重大专项资助项目(2011ZX05062-006);北京市优秀博士学位论文指导教师科技资助项目(YB20101141501);教育部新世纪优秀人才资助项目(NCET-11-0721)

摘　　要：为分析煤岩显微组分对甲烷吸附作用的影响,对我国柴达木、鄂尔多斯和沁水等盆地的11个煤田49个煤样的煤质、煤岩显微组分和甲烷等温吸附关系进行了系统试验。结果表明:低、中煤阶煤的甲烷吸附能力随镜质组含量的增加而增加,而高煤阶煤的吸附能力则随之增加而降低。惰质组含量对煤吸附甲烷能力的影响较大,高煤阶煤的甲烷吸附能力随惰质组含量的增加而增加,而低、中煤阶煤的甲烷吸附能力则随之增加呈先增加后降低的趋势。低、中煤阶煤中的丝质体含量越低、半丝质体含量越高,煤的吸附能力越强。低煤阶煤吸附甲烷的能力与壳质组呈负相关关系。In order to analyze the coal maceral composition affected to the methane adsorption, the systematic tests were conducted on coal quality, coal and rock maceral composition and methane isothermal adsorption relationship of 49 coal samples from 11 coalfields in Qaidam Basin, Ordos Basin, Qinshui Basin, and other basins. The results showed that the methane adsorption capacity of the low and medium ranking coal would be increased with the vitrinite content increased and the adsorption capacity of the high ranking coal would be decreased with the vitrinite content increased. The inertinite content would have a high influence to the coal methane adsorption capacity. The methane adsorption capacity of high ranking coal would be increased with the inertinite content increased and the methane adsorption capacity of the low and medium ranking coal would be firstly increased with the inertinite content increased and then decreased in tenden- cy. When the fusinite content in low and medium ranking coal was lower, the semifusinite content in the low and medium ranking coal would be higher and the coal adsorption capacity would be stronger. The coal adsorption capacity of low ranking coal and the exinite would be in a negative correlation.

关 键 词：煤层气 吸附能力 显微组分 煤储层 

分 类 号：TD712.2[矿业工程—矿井通风与安全]