中文摘要：

CO2地质储存是减少温室气体排放的有效途径之一,为研究高浓度CO2在包气带中的逃逸过程及其运移规律,利用人工模拟CO2在包气带泄露过程的方法,建立并验证了相关的数学模型。结果表明：CO2逸散过程中,土壤由深到浅CO2的浓度分布依次降低,不同浓度CO2气体的运移规律相同,土壤中CO2浓度随时间迅速上升到一定值后到达稳定,在相同土壤深度CO2浓度稳定值与初始相比的百分比是相等的。气体流速v、弥散系数D、逃逸CO2浓度是影响土壤包气带中CO2时空分布的主要因素。

英文摘要：

CO2geological storage is one of the effective ways to reduce greenhouse gas emissions in the world. In this research,in order to study the CO2 leak in the soil of unsaturated zone,the experiment applied artificial simulation process of CO2 leak in unsaturated zone to research the transportation rule for high concentrations CO2 leak in unsaturated zone. Then the mathematical model was established and verified. The results showed that in the process of CO2 leaks,the CO2 concentration reduced from deep to shallow soil. And transport process was basically the same with different concentrations of CO2 gas,Velocity of the gas,dispersion coefficient and CO2 concentration were the main factors that affected CO2 distribution in the unsaturated zone.