冀中坳陷高阳地热田水文地球化学特征及其对地热成因的约束  

Hydrogeochemical characteristics of Gaoyang geothermal field in central Hebei Depression and its constraint on geothermal genesis

作　　者：赵子锐 张薇[1,2] 王贵玲 邢林啸[1,2,3] 张汉雄 赵佳怡[1,2] ZHAO Zirui;ZHANG Wei;WANG Guiling;XING Linxiao;ZHANG Hanxiong;ZHAO Jiayi(Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,Hebei,China;Technology Innovation Center for Geothermal&Hot Dry Rock Exploration and Development,Ministry of Natural Resources,Shijiazhuang 050061,Hebei,China;Faculty of Environment,China University of Geosciences,Wuhan 430074,Hubei China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,河北石家庄050061 [2]自然资源部地热与干热岩勘查开发技术创新中心,河北石家庄050061 [3]中国地质大学环境学院,湖北武汉430074

出　　处：《中国地质》2025年第1期246-263,共18页Geology in China

基　　金：中国地质科学院基本科研业务费项目(SK202306);中国地质调查项目(DD20190555)联合资助。

摘　　要：【研究目的】高阳地热田赋存丰富的中低温地热资源,地热流体水文地球化学研究是认识深部地热水循环过程、揭示地热系统成因机制的有效手段。【研究方法】通过对高阳地热田地热水样品的水化学及同位素数据的分析,研究深部地热水的形成与演化过程。【研究结果】碳酸盐岩热储水化学类型为Cl–Na型,砂岩热储水化学类型为HCO_(3)·Cl–Na和Cl·HCO_(3)–Na型,地热水中的离子组分主要受盐岩、碳酸盐岩的溶解以及阳离子交替吸附作用控制。地热水接受太行山和燕山山区大气降水补给,补给高程在759.12~1092.33 m。雾迷山组热储温度为102~154℃,热循环深度为2524~4020 m;馆陶组热储温度为61~84℃,热循环深度为1357~2024 m。【结论】高阳地热田雾迷山组热储水样γNa^(+)/γCl^(–)小于馆陶组热储,γSO_(4)^(2–)/γCl^(–)和γCl^(–)/(γHCO_(3)^(–)+CO_(3)^(2–))大于馆陶组热储,说明雾迷山组热储相比于馆陶组热储变质程度更高,封闭性更好,地热水循环速度更缓慢,盐化程度更高。深部热储的热量一部分通过热水沿断裂通道以热对流的方式向上传递,另一部分通过岩石以热传导的方式向上传递,形成对流−传导型地热系统。[Objective]Gaoyang geothermal field rich in low-medium temperature geothermal resources.Hydrogeochemical research of geothermal fluids is an effective method to understand the processes of deep geothermal water circulation and to reveal the genesis mechanism of geothermal systems.[Methods]Through analyzing hydrochemical and isotopic data of geothermal water samples in Gaoyang field,we can explore the formation and development process of deep geothermal water.[Results]The hydrochemical type of carbonate reservoirs is Cl-Na type,and that of sandstones reservoirs is HCO_(3)·Cl-Na and Cl·HCO_(3)-Na type.The ionic components in geothermal water are mainly controlled by the dissolution of salt rock and carbonate rock and the alternating adsorption of cations.Geothermal water is recharged from precipitation in the Taihang and Yanshan mountains,The recharge elevation of geothermal water is 759.12-1092.33 m.The geothermal reservoirs temperature of Jxw is 102-154℃,and the depth of thermal cycle is 2524-4020 m;the geothermal reservoirs temperature of Ng is 61-84℃,and the depth of thermal cycle is 1357-2024 m.[Conclusions]In Gaoyang geothermal field,the γ Na^(+)/γCl^(-)of samples from the Jxw reservoirs is smaller than that Ng reservoirs,and theγSO_(4)^(2-)/γCl^(-)和γCl^(-)/(γHCO_(3)^(-)+CO_(3)^(2-))are larger than that of the Ng reservoirs.This indicates that Jxw reservoirs has a higher degree of metamorphism,better confinement,slower geothermal water circulation and higher degree of salinization than the Ng reservoirs.The heat from the deep thermal storage is partly transferred upward by thermal convection through hot water along the fault channels,and partly transferred upward by thermal conduction through rocks,forming a convection-conduction type geothermal system.

关 键 词：冀中坳陷 高阳地热田 水文地球化学 氢氧同位素 热储温度 地热勘查工程 

分 类 号：P314[天文地球—固体地球物理学]