Application Water Geothermometry on Geothermal Systems of Taiwan

Abstract

Using geochemical signatures from water samples as a proxy for geothermal exploration has been applied for years. Among them, the temperature of reservoir is crucial for geothermal power generation. This paper is aimed to apply geotherometer to metamorphic and sedimentary regions in Taiwan. Metamorphic area is represented by Chingshui with sodium bicarbonate signature while Kuantzeling area is the example for sedimentary region with chloride characteristics. The estimate reservoir temperatures by different geothemometers showed different results. The estimated temperatures are 100, 179, 239, and 95 ºC for Kuantzeling by using silica, sodium–potassium, sodium–potassium-calcium and multicomponent geothermometers, while 100 ºC 174 ºC 237 ºC and110 ºC for Chonglun and 56.9 ºC150 ºC156 ºC 55 ºC for Liuchungshi. On the other hand, the estimated temperatures are 193 ºC164 ºC218 ºC160 ºC for Chingshui by the same geothermometers. The results obtained by silica and multicomponent geothermometers are more comparable than those from the other two geothermometers. The effect of water in rock will be added to the future work.