盐岩CO2处置相关研究进展

现代工业生产排放了大量的CO2，为了缓解CO2造成的温室效应，对CO2进行捕获并进行地下处置是减少CO2排放量的一个有效可行的措施。在各种地下处置方法和介质中，利用盐岩溶腔进行CO2地下处置具有单个溶腔处置量大、注入速度快等优点。简要介绍了盐岩CO2地下处置存在的主要岩石力学问题，即溶腔内存在长期增压的过程。综述了影响溶腔内压的主要因素及其相互耦合作用的研究进展。这些因素包括：盐岩的蠕变性、CO2的高压缩性、盐岩在高应力下的渗透性、CO2沿管鞋的渗漏等。由于我国CO2排放的持续增加，结合我国层状盐岩的地质条件和力学特性，对各种因素的耦合作用的理论研究是今后的一个重要研究方向。

Research advance of CO2 storage in rock salt caverns

Modern industry makes an increasing number of CO2 emissions. CO2 Capture and Storage (CCS) is an enabling technology that will mitigate the greenhouse effect caused by CO2. Salt caverns may be an option of permanent or temporary repositories for CO2. Salt cavern storage of CO2 is attractive for several reasons, e.g. high sequestration efficiency and high rate of filling etc. Storage of CO2 in salt caverns differs from natural gas storage in salt caverns for the continuous cavern pressure buildup of the former. Four main possible factors will influence the long-term pressurization of a CO2 sequestration cavern: salt creep, compressibility of CO2 as supercritical fluid, leakage from caverns and leakage along the wells. The basic concept of CO2 storage in salt rock caverns is described; the research advance of the influence of those factors and their coupling effect is summarized. This paper suggests that since the emission of CO2 in China continues to increase, the coupling effect of the creep-compressibility of CO2-seeapage will be an attractive topic if the geological condition and mechanical behavior of Chinese bedded salt rock are included.