| 北京小汤山地区第四系高氟地下水与地热水关系研究 |
| 投稿时间：2022-09-30 修订日期：2022-11-24 点此下载全文 |
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| 基金项目:北京市自然科学基金项目（8181002） |
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| 中文摘要:北京小汤山地区第四系深层地下水氟含量普遍超标，严重制约区域供水。在收集整理基础地质、水文地质、地热地质资料基础上，开展第四系高氟地下水与地热水之间关系研究工作。研究表明：小汤山地区位于复式背斜的核部区域，该区热储层与第四系地层直接接触并形成“天窗”，受构造应力影响在热储层发育大量张性裂隙，加之上覆第四系盖层结构松散且厚度较薄，导致该区成为地热富集带；在高温高压环境下, 地热水中氟化物含量普遍较高，地热水上涌同第四系深层地下水发生热流-冷流的混水作用，导致第四系深层地下水中氟化物含量升高，形成第四系高氟地下水。 |
| 中文关键词:城市地质 高氟地下水 地热水 热储层 |
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| Study on the relationship between quaternary high fluorine groundwater and geothermal water in Xiaotangshan area, Beijing |
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| Abstract:The fluorine content in the deep groundwater generally exceeds the standard in Xiaotangshan area of Beijing, which seriously restricts the regional water supply. Based on the collection of basic geological, hydrogeological and geothermal geological data, the relationship between Quaternary high fluorine groundwater and geothermal water was studied. The study showed that the Xiaotangshan area is in the nuclear part of the anticline. In this area the geothermal reservoir is in contact with Quaternary strata. Under the influence of tectonic stress, a large number of tensile fractures are developed in the geothermal reservoir. And Quaternary strata are loose and thin, this area becomes a geothermal enrichment zone. Under high temperature and pressure, fluoride content in geothermal water is generally high.Because of the mixing of geothermal water and quaternary deep groundwater, fluoride in Quaternary deep groundwater increases and high fluoride groundwater is formed. |
| keywords:urban geology high fluoride groundwater geothermal water geothermal reservoir |
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