Research of Geothermal Reinjection in Xi’an Geothermal System, West China

Abstract

Geothermal resources are widely distributed in China. Recent years, a lot of research work has been carried out on the distribution, utilization, drilling, and exploration of geothermal resources. However, for geothermal reinjection, there is almost no record in China. In this paper, based on the geological characteristic, geophysical and geochemical features of Xi’an low-temperature geothermal field, a 3-D numerical model is established to model the change of temperature and pressure after reinjection. The results show that making reinjection at depth 1450m to 2300m will benefit the reservoir pressure and will not change the temperature a lot.