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个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:Nottingham trent University
学位:博士
所在单位:能源与动力学院
学科:制冷及低温工程. 工程热物理. 热能工程
办公地点:能动学院新大楼822室
联系方式:wzhongli@dlut.edu.cn
电子邮箱:wzhongli@dlut.edu.cn
Characterization of dissolution process during brine injection in Berea sandstones: an experiment study
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论文类型:期刊论文
发表时间:2016-01-01
发表刊物:RSC ADVANCES
收录刊物:SCIE、EI
卷号:6
期号:115
页面范围:114320-114328
ISSN号:2046-2069
摘要:A clear understanding of the mass transfer properties during fluid injection into porous media is of importance to the safety of CO2 storage. In this study, several experiments were conducted to elucidate the displacement and dissolution processes of gaseous and supercritical CO2 in Berea sandstones using the X-ray CT technology. The initial CO2 distribution before brine injection was related to the pore structure of the sandstones. Transient images during brine injection at different flow rates showed a transformation from displacement to dissolution, and the dissolution fronts were affected by the core heterogeneity and flow rates. Then, the CO2 saturation was determined by imaging analysis. Both supercritical and gaseous CO2 saturation decreased sharply, meaning that dissolution dominated the flow process. The dissolution time could be correlated in terms of the flow rate, initial gas saturation and heterogeneity of the sandstone. The relationships between CO2 volume content and specific surface area were verified to qualitatively predict the influence of heterogeneity. The dynamic concentration and mass transfer coefficient were obtained, which gave the information for the mass transfer rate during CO2 storage.