應用多成份地質溫度計探討台灣的地熱儲集層溫度

中文摘要熱水儲集層的溫度是地熱再生能源發電重要的一個環節。水化學地質溫度計是很好估算地熱儲集層溫度的方法之一，其中包括二氧化矽、鈉-鉀、鈉-鉀-鈣、鈉-鋰、鉀-鎂及多成份地質溫度計，本研究將目前世界上使用於地熱區估算儲集層溫度的多成份地質溫度計應用於臺灣。本研究區域各別選擇位於宜蘭地區及沉積岩區的關子嶺。本研究結果顯示，宜蘭平原東側屬於含鈣濃度較高碳酸氫水體，宜蘭山麓地帶屬於含鈉濃度較高碳酸氫水體，清水地熱的水體屬於碳酸氫鈉泉，而關子嶺的水體屬於氯化物泉。以多成份地質溫度計估算地熱儲集層溫度，其結果為關子嶺地區以多成分地質溫度計估算中崙的溫度為74.5°C、關子嶺的溫度為72°C、而六重溪的溫度為55 °C。以多成分地質溫度計估算地熱儲集層的溫度時，宜蘭平原儲集層溫度為36°C-110°C，宜蘭平原南側山麓儲集層溫度為31°C-170°C，清水地熱儲集層溫度為151°C-248°C。另外，清水地熱區岩層之礦物相在地熱徵兆現象相當劇烈的地方，礦物相從伊萊石轉變為膨潤石-伊萊石混層。

關鍵字

多成份地質溫度計；地熱儲集層溫度；宜蘭；關子嶺

並列摘要

Abstract The geothermal reservoir temperature is important factor for exploration. The water geothermometry is a useful tool for calculating the reservoir temperature including the silica, Na-K, Na-K-Ca, Na-Li, K-Mg, and multicomponent geothermometers. Now the multicomponent geothermometer often is applied on the geothermal field of world. In this study, we would apply multicomponent geothermometry on the geothermal field of Taiwan including Ilan Plan and Kuantzeling area. According to the major elements concentration, the waters of western Ilan Plan belong to Ca-HCO_3 type, the waters of eastern Ilan Plan are Na-HCO_3 types, the waters of Backbone Range Belt belong to Na-Ca-HCO_3 type, the thermal water of Chingshui geothermal field belongs to Na-HCO_3 water, the hot spring of Kuangzuling area is Na-Cl water. For the reservoir temperature, the result of geothermometer are consistent with fix aluminum and degassing condition of multicomponent geothermometer. The reservoir temperature values are 74.5°C, 72°C, and 55°C by fix aluminum and degassing condition of multicomponent geothermometer in the Chonglun, Kuantzeling, and Liuchungshi, respectively. The reservoir temperature values of multicomponent geothermometer present 36°C-110°C, 31°C-170°C. Finally, there are display smectite-illite mix layer in significant hydrothermal alteration phenomena area of Chingshui geothermal field that this study infers to illite transformation.