超临界CO_(2)开采页岩气微观渗流机理研究进展  

Review on Microscopic Seepage Mechanism for Shale Gas Extracted by Supercritical CO_(2) Flooding

作　　者：余成伟 YU Chengwei(Wuhan City Industry Investment Group Co.,Ltd.,Hubei Wuhan 430014,China)

机构地区：[1]武汉市都市产业投资集团有限公司,湖北武汉430014

出　　处：《广州化工》2024年第19期21-25,共5页GuangZhou Chemical Industry

摘　　要：超临界CO_(2)开采页岩气可以提高页岩气采收率,实现CO_(2)的地质封存。从页岩气的吸附与解吸、CO_(2)与CH_(4)的竞争吸附、多尺度空间传质过程以及多场耦合作用下的页岩气渗流机理等几个方面介绍了超临界CO_(2)条件下页岩气渗流机理的研究现状。其中,由于吸附滞后现象的存在,需要同时考虑解吸模型。对于竞争吸附机理,从动力学直径、临界温度、分子极性和扩散速率等方面解释了页岩对CO_(2)的吸附能力强于CH_(4)的原因。Supercritical CO_(2) extraction of shale gas can not only improve the shale gas recovery rate,but also realize the geological storage of CO_(2).The current research status of shale gas seepage mechanism under supercritical CO_(2) conditions was introduced from several aspects,including adsorption and desorption of shale gas,competitive adsorption of CO_(2) and CH_(4),multiscale spatial mass transfer process,and shale gas seepage mechanism under the action of multi-field coupling.Among them,due to the existence of adsorption hysteresis phenomenon,the desorption model needed to be considered simultaneously.For the competitive adsorption mechanism,the reasons for the stronger adsorption capacity of shale for CO_(2) than CH_(4) were explained in terms of kinetic diameter,critical temperature,molecular polarity,and diffusion rate,etc.

关 键 词：超临界CO_(2) 页岩气开采 吸附/解吸 

分 类 号：TE377[石油与天然气工程—油气田开发工程]