From the hydrochemical analyses of geothermal water,the temperatures and the depths of the geothermal reservoir are estimated at about 80～110℃ and 900～1200 m respectively by means of SiO 2 and Na/K geothermometers.
According to the calculated temperature of SiO_2 geothermometer,the temperature and depths of geothermal reservoir for net geothermal water in the study area are estimated at about 80℃～121℃ and 1146.84～1779.38m respectively.
It has corrosion characteristics and weak scaling, which has good exploration value. As calculated, exploitation yield of 1 specific well in 1a in Guantao geothermal reservoir is 5.431×10 5m 3; total exploitation yield is 1.156×10 13 KJ, and reasonable spacing between wells is 1500m.
When the dissolved SiO 2 (quartz) enthalpy diagram is employed for the mixing models, in which the steam was lost before mixing with the cold water, the lowest estimated temperatures of the geothermal reservoir are in the range of 83～138 ℃.
Studies show that, when the dissolved SiO 2 (quartz) enthalpy diagram is used for adiabatic cooling, and the quartz geothermometer equation is adopted for conductive cooling without mixing with cold water during upflow, the lowest estimated temperatures of the geothermal reservoir are in the range of 78～134 ℃ and the highest estimated temperatures are between 95 and 155 ℃.
With WATCH program, the geothermal reservoir temperature is in the range of 104.7 -124.8℃ on the base of calculation of the quartz geothermometer, which proves the Wumishan geothermal reservoir has large potential to develop and utilize.
Based on the long-term monitoring, a study including chemical components of geothermal water, geothermometers, the general strength of geothermal activity and water/rock equilibrium indicates that the production of the geothermal field has caused certain increase of both water and heat recharge into the geothermal reservoir.
Fluid Pressure Variation in a Sedimentary Geothermal Reservoir in the North German Basin: Case Study Gro? Sch?nebeck
The stronger splitting effects that were observed in the area of the CPGF were found consistent with the geothermal reservoir that is embedded in the sedimentary cover of the zone, at depths of 1 to 4-5 km from the surface.
Using Automated, High-precision Repicking to Improve Delineation of Microseismic Structures at the Soultz Geothermal Reservoir
Various volcanological methods can be applied in the search for aquifers and geothermal reservoir rocks.
Of these earthquakes, two occurred in conjunction with the construction of the new Gotthard railway tunnel and 165 were induced artificially by the stimulation of a proposed geothermal reservoir beneath the city of Basel.