Abstract
The aim of this work is to determine the thermal storage temperature of a deep thermal reservoir, which has a great significance for the effective utilization of geothermal resources. The temperature of the reservoir was estimated by the cation ratio geothermometer and SiO2 geothermometer methods. The results indicate that the K–Mg geothermometer is the best method of the cation ratio methods, with the calculated temperature of 108°C. The average value calculated by the SiO2 method was 107°C. The measured temperature of the GRY1 drilling water sample in the Cangxian arch belt was 108°C. Because the calculated results of the geothermometers were consistent with the measured value of the borehole water, the K–Mg and SiO2 geothermometers are suitable for the estimation of deep heat storage temperatures.
Highlights
China’s environmental problems caused by fossil fuels are severe and have affected human health and the ecosystem, for the Beijing–Tianjin–Hebei region
The results of the analysis indicate that several minerals in the water sample before GRY1 drilling and fracturing were in two groups in the reference temperature range, and the chalcedony was close to saturation line
It was found that the temperature of the geothermal fluid reservoir in the area was suitable for using the chalcedony and K–Mg geothermometers
Summary
China’s environmental problems caused by fossil fuels are severe and have affected human health and the ecosystem, for the Beijing–Tianjin–Hebei region. Development is working closely with energy advancement by reducing the use of fossil fuels and focusing on clean energy. The potential for the development and utilization of geothermal resources is increasingly appealing due to geothermal’s environmental safety and sustainability. Due to the high risk and cost of deep-drilling exploration, geothermal research has been concentrated on shallow geothermal resources. Hydrogeochemistry, gas geochemistry, and the isotopic geochemical indicators of geothermal fluids contain information about the deep geological environment and geothermal fluid systems. These analyses are the most costeffective way to study underground thermal storage during geothermal exploration. Geothermometers are the most used methods to estimate a thermal reservoir’s temperature (Ding, 2013; Fournier and Ii, 1979; Wang, 2017)
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