摘要
广东省江门台山汶村潮间带地热田地热资源储量丰富,研究其水化学特点、成因机制和热储温度可为后续开发利用提供参考。通过Piper三线图分析地热水水化学特点,根据代表组分离子比例系数和其日变化、年变化规律分析地热水成因机制;通过氢氧同位素分析并定量估算丰水期与枯水期地热水中咸水-淡水混合比例;利用Na-K-Mg三角图和地热温标公式法估算地热田热储温度。结果表明:研究区地热水属海相沉积地热水,热储温度约150℃,为深部热源沿断层上升过程中受浅表淡水和海水混合作用的结果,丰水期和枯水期的淡水比例分别为77.60%和58.76%。
The intertidal geothermal field in Wencun,Taishan,Jiangmen,Guangdong Province has abundant reserves of geothermal resources.The study of its hydrochemical characteristics,genetic mechanism and thermal storage temperature can provide a reference for subsequent development and utilization.The hydrochemical characteristics of geothermal water were analyzed by using Piper′s three-line diagram,and the genesis mechanism of geothermal water was studied according to the proportion coefficient of representative component ions and its daily and annual changes.The mixture ratio of salt water-fresh water in geothermal water of wet and dry seasons was quantitatively estimated by innovative hydrogen and oxygen isotopes.The thermal storage temperature of geothermal field was estimated by using Na-K-Mg trigonometric diagram and geothermal temperature scale formula.The results showed that the geothermal water in the study area belonged to marine sedimentary geothermal water,and the thermal storage temperature was about 150℃.These attributed to mix of shallow fresh water and seawater during the rising process of deep heat source of the geothermal field along the fault,and the proportion of fresh water in the wet season and dry season was 77.60%and 58.76%,respectively.
作者
刘润方
李理
LIU Runfang;LI Li(Changjiang Geotechnical Engineering Company Limited,Wuhan 430010,China)
出处
《水利水电快报》
2023年第10期104-109,共6页
Express Water Resources & Hydropower Information
关键词
水化学特征
潮间带
地热田
淡水混合比例
热储温度
hydrochemical characteristics
inter-tidal zone
geothermal field
mixed ratio of fresh water
thermal storage temperature
