Present State of Underground Storage and Development Trends in Engineering Technologies at Home and Abroad

In recent years, great progress has been made in the construction of underground storage, especially gas storage, which has played an important part in peak modulation and safe supply of natural gas. How to utilize the underground storage to enhance energy efficiency, preserve energy and minimize emissions has been a hot topic of continuous research in China. On the basis of introducing the construction and engineering technologies that related to underground gas storage, salt cave oil storage, compressed air/hydrogen storage, underground CO2 storage, waste storage, and more around the world, the technical state and existing problems of underground storage projects have been elaborated, and analyzed the factors that promote technical development of underground storage, and the development trend of underground storage engineering technology, Finally, some cognition and suggestions for the development of underground storage technology in China are given, to provide the necessary references for the development of domestic underground storage engineering and technology.