煤储层中CO_2埋藏量主控因素实验研究  

Experimental Study of CO_2 Burial Influencing Factors in Coal Reservoir

作　　者：刘成龙[1] 王延斌[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《煤炭技术》2017年第2期154-156,共3页Coal Technology

基　　金：国家科技重大专项(2011ZX05042-003)

摘　　要：通过气态CO_2煤中等温吸附实验和溶解态CO_2与煤中矿物反应实验揭示了CO_2在煤储层中埋藏量的主控因素及控制规律,实验结果显示,压力、温度、CH4气含量以及煤中矿物组成是影响CO_2埋藏量的主要因素。压力和煤中矿物对CO_2埋藏产生正效应,随着压力的增大或是方解石、白云石及钾长石含量增大,CO_2吸附量增大。温度和CH4气含量对CO_2埋藏影响为负效应,温度升高或是CH4气含量增大均导致吸附量下降,低温条件埋藏对CO_2埋藏量及埋藏稳定性有利。煤对CO_2的吸附能力大于对CH4的吸附能力。Experiments including CO2 isothermal adsorption and coal mineral chemical reaction have been done. It reveals four main C02 burial influencing factors, which are pressure, temperature, CH4 gas content and coal mineral composition. Pressure on CO2 burial and coal mineral like calcite, dolomite and feldspar dissolution has positive effects on CO2 burial. With the increasing pressure and content of bicarbonate ions, potassium ions and carbonate ions adsorption of CO2 increases. Effect of temperature and CH4 gas content on CO2 burial is negative. Low temperature condition is good for CO2 burial and burial stability. CO2 adsorption capacity is much bigger than adsorption capacity of CH4.

关 键 词：CO2 埋藏量 煤储层 吸附特征 矿物反应 

分 类 号：X701.7[环境科学与工程—环境工程]