Journal of Geology & Geophysics
Open Access

Simulation research on reinjection temperature field of geothermal well based on FEFLOW

International Conference on Geology

June 22-23, 2015 Florida, USA

Aidi Huo

Posters-Accepted Abstracts: J Geol Geosci

Abstract :

Aquifer energy utilization has become a new technology with injection and production wells technological development, accurately predicting the effective use of heat energy storage is of great significance. A new concept of flow transfixion is suggested by analyzing the general features of the aquifer. The interaction between flow transfixion and heat transfixion, and its significance to practical engineering are also analyzed. A couple of numerical models of groundwater flow and heat transferring are established based on the basics of water-heat transferring in the aquifer. The numerical analysis of the flow and temperature fields for one Injection and Production Wells System (IPWS) in Xianyang City shows that the formation of flow transfixion is hydraulic gradient; namely, it can be judged quantitatively by whether the flow transfixion takes place or not according to hydraulic gradient. The effect of the injecting and pumping rate (Q) to the flow transfixion shows that the shorter time of flow transfixion, the greater the value of Q, it is easier for flow transfixion to occur, and then lead to the occurrence of thermal breakthrough. When running 120 d, to prevent the thermal breakthrough in Production wells, the reasonable well spacing is 180 m - 200 m. Optimal well spacing is 180 meters.