摘要
煤层含气量是煤矿设计和煤层气开发利用中极为重要的参数之一，其值变化范围大（０～２０ｍ３／ｔ），影响因素多而复杂。一般情况下，煤层的生气量远远大于现今煤层的含气量，故生气量高低不是制约煤层含气量的关键因素，而煤层储气能力才是制约煤层含气量高低的主要因素。煤层储气能力随着煤阶的增高和埋深的增加而增高（埋深＜８００ｍ时最明显），随着孔隙度的增加和微孔隙的增多而增高。低煤阶（焦煤以下）时，丝质组煤层的储气能力高于镜质组的储气能力；高煤阶则相反。镜质组含量高的煤层吸附能力也强。煤层储气能力随矿物质和水分含量的增高而降低。
Coalbed gas content,with a big change range(0～20 m3/t)and affected by a lot of complex factor,is a very important parameter in coal mine design and coalbed gas development. In general condoition, coalbed gas bearing yield is much bigger than gas content. So, the key factor of controlling coalbed gas content is not gas bearing yield but the coalbed gas storing capacity. The increase of coalbed gas storing capacity is along with those of coalification stages,burial depth (especially when burial depth is<800 m),porosity and micropore. The gas storing capacity of fusinite is > that of vitrinite at low coalification stages (under coking coal; But it is opposite at high coalifcation stages. The vitrinite coalbed with high coalbed gas content has big adsorption capacity. The decrease of coalbed gas storing capacity is along with the content increase of mineral substance and water.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1995年第5期1-5,共5页
Natural Gas Industry
关键词
煤层
含气量
储气
Coalbed, Gas content, Influence factor, Research.
