Abstract:In order to systematically illustrate the breakthrough achievements of the geothermal exploration well, and assess the development and utilization potential of karst geothermal water, multiple methods and techniques were used to investigate geothermal geological structure in the Tongluo Mountain, Guangan city. Based on previous geological and hydrogeological studies, and combined with geothermal geological investigation, geophysical prospecting, geothermal drilling, geophysical well logging, hydrogeological test, water chemistry and isotopic analysis results, the geothermal reservoir’s structure and geothermal water yield property was studied. The results show that stratigraphic boundary, geothermal reservoir structure, and hydrological parameters of thermal reservoir were firstly distinguished, identified, and achieved in the Tongluo Mountain, respectively. Moreover, through the geothermal exploration well, the theory of karstic geothermal reservoir of fold belts in western Sichuan will be improved to some extent. And the planning and construction of a spa town in Guangan city are boosting. In addition, exploration experience and demonstration can be provided by this job for karst geothermal exploration and exploitation in the future.