北京昌平新城地区地热流体质量评价

Geothermal Fluid Quality Evaluation in Changping New Town, Beijing

系统收集昌平新城地区8眼地热井的水质全分析资料,开展了地热流体质量评价。包括三方面内容,一是根据地热地质条件差异分4个区块,采用舒卡列夫分类方法对水化学类型进行了评价。二是开展了地热水的不同用途评价。三是对地热水的腐蚀性和结构性进行了评价。评价结果显示,本区地热水不同区块水化学类型不同,但均属于低矿化、弱碱性、微硬水;氟(F^-)含量普遍达到了命名矿水标准,可命名为氟水;偏硅酸(H_2SiO_3)含量达到了矿水浓度,有医疗价值。腐蚀性评价结果为"非腐蚀性水"或"半腐蚀性水",结垢性评价结果为"不结垢"或"轻微结垢"。

Water quality analysis data of 8 geothermal boreholes was systematically collected and applied in the geothermal fluid quality evaluation in Changping New Town.There are three aspects of research work:firstly,according to the difference of geothermal geological conditions,hydrochemical type is evaluated by Shug Kalev classification method at four areas;secondly,the different uses of geothermal water are evaluated;thirdly,the corrosion and structure of geothermal water are evaluated.The results show that,although the hydrochemical types of geothermal water are varied in different areas,all belong to low mineralization,weak alkaline,micro-hard water.Fluoride(F-)in the water generally reaches the standard of the named mineral water,and the water can be named as Fluoride water.The concentration of H2SiO3 reaches the standard of mineral water,with the good medical value.In the aspect of corrosive and water scaling assessment,the water can be evaluated as the non-corrosive water or halfcorrosive water,and it belongs to no-scaling or slight-scaling water.