济源市盘古寺—五龙口断裂带地热区地热水化学特征分析及地热资源量估算

Chemical Characteristics Analysis of Geothermal Water and Estimation of Geothermal Resources in Pangusi-Wulongkou Fault Geothermal Zone in Jiyuan City

为分析济源市盘古寺-五龙口断裂带地热区地热水化学特征和估算地热资源量,在分析地热区地质背景的基础上,根据地热井地热水水质分析结果,采用Gibbs图对地热水的水化学类型和地热水化学组分成因进行分析,采用热储法对地热区的地热资源量进行估算。结果表明,第四系松散岩热储层地热水化学类型为HCO_(3)-Ca·Mg型,寒武系—奥陶系碳酸盐岩热储层地热水化学类型为SO_(4)·HCO_(3)-Na·Ca型,太古界片麻岩热储层地热水化学类型为Cl·SO_(4)-Na型,化学组分的形成主要受水岩作用与蒸发作用控制;地热区热储中储存的热量为3.62×10^(16)J,可开采热量为4.79×10^(15)J,为该地热区地热资源的开发利用提供参考。

In order to analyze the chemical characteristics of geothermal water and estimate the amount of geothermal resources in the geothermal zone of Pangusi-Wulongkou fault zone in Jiyuan City,based on the analysis of the geological background of the geothermal area and the analysis results of the water quality of geothermal water in geothermal Wells,Gibbs diagram were used to analyze the hydrochemical types of geothermal water and the genesis of the chemical components of geothermal water.The thermal reservoir method is used to estimate the geothermal resources in the geothermal area.The results show that the chemical type of geothermal water in Quaternary loose rock reservoir is HCO_(3)-Ca·Mg type,that in Cambrian and Ordovician carbonate reservoir is SO_(4)·HCO_(3)-Na·Ca type,and that in Archean gneiss reservoir is Cl·SO_(4)-Na type.The formation of chemical components is mainly controlled by water-rock interaction and evaporation.The heat stored in the geothermal reservoir is 3.62×10^(16) J,and the recoverable heat is 4.79×10^(15) J,which provides a reference for the development and utilization of geothermal resources in this zone.