Geothermal Resource Conditions and Utilization Potential In The Lower Yangtze River South Jiangsu Region，eastern China

The comprehensive utilization of geothermal can provide energy solutions in a variety of application scenarios. In the warm and humid climate zone, represented by southern Jiangsu Province in the lower Yangtze River area in Eastern China, where have great requirement for summer-cooling and winter-heating, and several hot springs such as Nanjing Tangshan are developed. In order to further evaluate the geothermal formation conditions, resource potential and comprehensive utilization, this paper conducted statistical analysis on 36 hot springs and 79 geothermal drillings in the area, evaluated the geothermal temperature gradient and geophysical abnormalities, and concluded that: the geothermal temperature in the area is mainly medium-low temperature, geothermal anomalies are controlled by basin basement conduction heat in general, controlled by faults and lithology, showing as local convective thermal anomalies. Karst type, igneous rock type and sandstone type thermal reserves are developed in the area, and sandstone type and carbonate rock type thermal reserves are predominant. The total heat storage volume estimated by volumetric method in southern Jiangsu Province is 1.80×1020 J, the geothermal fluid storage volume is 1.32×1011 m3, the total recoverable resources of geothermal fluid is 6.65×106m3/d, and the recoverable heat is 3.13×1017J/d. However, the distribution is extremely uneven, mainly distributed in central Nanjing, northeast Zhenjiang, northeast Changzhou and south-central Suzhou, and the resource The abundance is between1.19×108 J/km2and3.70×108J/km2. The utilization of medium-low temperature geothermal resources in southern Jiangsu Province is more suitable for ground source heat pumps, integrated farming, recreation, and other methods. Medium-deep geothermal resources have certain potential and value in heating. Cooling in summer is constrained by current technology and is still not suitable for large-scale utilization.