层状盐岩地层油气储库建造技术研发进展

Research and development progress of oil and gas storage construction technology in bedded salt rock formation

利用盐岩地层大规模实施油气等能源储备是保证中国能源安全的重大战略需求。中国盐岩具有典型的湖相沉积特征,盐层薄、夹层多、杂质含量高,要在这种地层中实施能源储备,安全高效建库是关键。经过20余年的不断创新实践、自主攻关,系统开展了水溶造腔试验研究,形成了复杂盐层水溶造腔仿真技术并开发完成了仿真模拟软件,研发了针对层状盐岩不规则溶腔的修复方法。同时,建立了一系列复杂盐岩地层中能源地下储备库建造关键理论与新技术,包括盐穴储库建造、新型储气方案等关键技术,其中多项技术已经在金坛盐穴储气库得到应用和验证,均取得良好效果。研究成果可为层状盐岩地层中油气储库建造提供理论依据和技术支持,为新型地下能源储备的发展提供借鉴。

The large-scale reserve of oil, gas, and other energy in salt rock formation is a major strategic need to ensure energy security in China. Bedded salt rock in China has typical characteristics: low height of salt layers, fragmentation by interlayers, and high insoluble content. Safe and efficient construction of reservoirs is the key technology for energy storage in salt rock formations. After more than 20 years of research and engineering application, a complete cavity construction technology has been formed, including the simulation technology for solution mining, the cavern leaching simulation software, and the irregular cavity repair methods. Meanwhile, several new theories and technologies for underground energy storage in complex salt rock formations were established, including collapse control of thick interlayers, multi-step cavity construction for horizontal wells, and gas storage technology from sediments. Many of them have been applied and verified in China with good results. Generally, the research results could provide a theoretical basis and technical support for the construction of oil and gas storage in bedded salt rock formations and serve as a reference for the development of new underground energy storage.