结垢是地热流体开采过程中经常面临的重要问题之一。本文运用水文地球化学模拟技术，对康定某高温地热井结垢问题进行了分析研究。研究结果表明，该地热井在开采过程中随着地热流体温度、pH、压力、氧化还原环境等条件变化，发生严重的结垢现象，主要结垢物类型为碳酸盐类垢物，其次为金属铁类垢物，而硅酸盐类垢物和硫酸盐类垢物较少或没有，与实际相吻合。该方法可以通过水化学指标分析结垢物种类、结垢趋势，为地热资源合理开发利用提供理论依据。%Scaling is one of the important issues in the process of geothermal fluid extraction. The paper tries to use hydro-geochemistry simulating technology to study scaling of the high-temperature geothermal well in Kangding County. The results show that the geothermal well in Kangding County scales seriously as geothermal fluid temperature, pH, pressure and redox environment change in the mining process. The main type of deposition is carbonate, following by metal Fe, and silicate or sulfate fouling is little or none. The simulation result is close to the practical case. The method can provide theoretical basis for reasonable development and utilization of geothermal resource through analyzing the results of deposition types and scaling trend with water chemical indicators.
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