Abstract:There is rich geothermal resources in Dongying area, and the main mining layers are Neogene Guantao formation and Paleogene Dongying formation. Thermal reservoir are warm hot water type and layered pore fissure type sandstone reservoir. The geothermal water supply condition is poor. In recent years, accompanying with the increase of the scale of exploitation and utilization of geothermal resources, geothermal water head in the mining area has been decreased obviously, and there is a threat to resource depletion and geological environment. Reinjection is an effective way to realize the sustainable utilization of geothermal resources and the protection of geological environment. In order to study the feasibility of geothermal reinjection and controlling factors for reinjection in Dongying city, recharge tests have been carried out in Nanzhan area. It is showed that the reservoir has a large space and the recharge condition is good, pressure on the recharge effect is obvious, but the influence of temperature on the water recharge recharge effect can not be ignored. Based on the test process, by using the relation between recharge and recharge of water head, the changes under different temperatures have been simulated and calculated, the influence of the injection volume and injection water temperature has been studide. It will provide some references for recharge study in future.
