Change Trend and Development Suggestions of Underground Gas Storage in China

During the 14th Five-Year Plan period, the huge peak shaving gap and resource degradation of underground gas storage（UGS） in China have formed a sharp contrast. UGS faces significant challenges, such as a lack of storage site resources and upgrading of technical difficulties. Therefore, by the research and analysis systematically on the types and characteristics of global UGS, proposed new change trends in domestic UGS site, and Exploring development strategies for UGS construction from the perspectives of new models, theoretical technologies, and supporting policies. In response to the characteristics of domestic separation between natural gas resources and market, coexistence of multiple peak shaving methods, and regional differences in UGS types, an overall layout and digital development direction for UGS construction have been constructed. Domestic UGS sites resources present four new trends of diversification, large scale, complexity and digitalization. The new model of collaborative construction of large-scale low-permeability lithological gas reservoirs and the "three zones" UGS, and Reservoir for gas drive and UGS, can activate a batch of site resources and greatly improve peak shaving capacity. New technologies such as dynamic sealing evaluation of geological bodies, seepage mechanism and design method of high-speed interactive injection-production, new technology for complex salt cavity building, can significantly improve operational efficiency and reduce safety risks. The research results provide scientific support for fully excavating UGS resources and guiding the efficient design of complex gas storage facilities.