With the adjustment of energy structure and the promotion of "dual carbon" goals, the exploration and development of geothermal resources has gradually become a hot spot. Through geological data collation, geothermal gradient calculation, heat storage thickness interpretation, hydrogeochemical testing and numerical simulation of irrigation and harvesting, the geothermal geological conditions of the X-platform pavilion of the Nanpu sag in the Bohai Bay Basin were discussed, and the potential of geothermal resources was clarified. The results show that the hot storage lithology of the Guantao Formation in the study area is mainly sand-conglomerate, and the sand-to-ground ratio is between 36.5~54.9%. The burial depth of the top boundary is between 2160m~2340m, the buried depth of the bottom boundary is between 2880m~2996m, the effective thickness of the thermal reservoir is 223.4m~349.6m, the porosity of the thermal reservoir is between 11.4%~39.0%, and the average permeability is 348.8×10-3μm2. The formation temperature is between 80.8 °C ~ 95.6 °C. The thermal storage resources are 10.683×1018J, equivalent to about 365 million tons of standard coal. Under the condition that the production and irrigation ratio of geothermal wells is 100% and the mining flow rate is 120 m3/h, it is concluded that the reasonable spacing of the production and irrigation wells with stable production for 30 years of geothermal water exploitation is 400m. It provides an effective reference for the exploration and development of medium and deep hydrothermal geothermal resources in oil-bearing basins in China.