自工業化以來，大量石化燃料的使用造成全球溫度上升。為了避免全球暖化造成的危害，再生能源的發展是可行的。地熱能相對於其他再生能源的優點有穩定不受天氣影響、安全性、低成本及高附加價值。全球超過82個國家使用地熱能發電。地熱發電最常遇見的問題是結垢和腐蝕。清水發電廠是台灣第一座地熱能發電廠，因為結垢問題只營運約12年。本研究使用TOUGHREACT建構數值模型模擬結垢現象並呈現生產井如何被影響。假設案例用於分析地球化學濃度和生產率對模型的敏感度。結果顯示孔隙率阻塞對地球化學濃度比生產率較為敏感。本研究將清水的修井資料應用於現地情況模擬。結果顯示經過12年後，井孔外的儲藏層孔隙率從0.1下降到0.07，生產率從每秒21.3公斤下降到每秒7.65公斤，井的生產能損失約64%。

Global surface temperature is increasing in recent decades because of the large amount of CO2 emissions produced by using fossil fuels. To prevent the serious consequence of global warming, the development of renewable energy generation is practical. The advantages of geothermal energy are better than others renewable energy including stability, safety, low-cost and diversified value-added. The common problems in geothermal utilization are scaling or corrosion. Chingshuei, Taiwan first geothermal power plant, encountered the scaling problem and only operated 12 years. In this study, a numerical model is constructed using TOUGHREACT to study the scaling process and demonstrate how well production is influenced. A hypothetical case is designed to explore the sensitivity of geochemistry and production rate on scaling. Scaling is found to be more sensitive to the geochemistry than to the production rates. In addition, the geochemistry data from the Chingshuei site is used to simulate the field case. For the Cingshuei site modeling, as the porosity decreases from 0.1 to 0.07, the production rate changes from 21.3 kg/s to 7.65 kg/s. The ability of well production losses 64%.

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