Abstract: Hongze sag in Subei basin experienced multiple geological effects, and deposited a large amount of salt mine in Zhaoji subsag. The study on the control mechanism of the tectonic evolution to the forming process of the salt mine is significant to the mining and utilization of the salt mine. It is found that the tectonic evolution of the Hongze sag is important to the forming progress of these salt mines. The tectonic evolution not only controls the forming and the development of the salt basin, but also has a direct impact on the salt material sources, brine distribution, salt deposition and distribution. The tectonic evolution controls the forming, development and the subduction process of the saline lake. The sag also protects the integrity of the salt mine. Based on the above analysis, the salt basin has a good trap characteristics, which can satisfy the basic geological conditions of forming underground oil/gas storage.

Key words: Hongze Sag, Tectonic Evolution, Salt Mine, Control Mechanism, Underground Oil/Gas Storage