Abstract:As a clean energy source, geothermal energy has advantages that other energy sources cannot possess. Geothermal energy can be used for heating residents, bathing in daily life, hot spring therapy, swimming in heated pools, as well as greenhouse gardening and aquaculture. Developing geothermal resources vigorously is of great significance for alleviating energy shortages, reducing environmental pollution, and promoting sustainable economic development. Tail water recharge is the main challenge faced by sandstone thermal storage development and utilization. The large amount of discharged tail water poses a threat of pollution to surrounding surface water and soil, which is not conducive to sustainable utilization of geothermal resources. In this paper, taking Hekou district in Dongying city as an example, the recharge experiment has been studied and analyzed. It will provide some references for sustainable utilization of geothermal resources.