激发极化测深法对洛阳市浅层地热勘查的研究

Study on shallow geothermal exploration in Luoyang City by induced polarization sounding method

洛阳市地热资源勘查及开发利用对支撑城市经济绿色发展具有极为重要的意义。研究区位于洛阳盆地内,地形地貌类型较为复杂,采用常规的方法在地热勘查中收效甚微,而地球物理探测方法具有成本低、高效且适用性强等特点,在目前地热勘查中发挥了极其重要的作用。在系统梳理研究区地形地貌、地层岩性、水文地质特征以及岩石地球物理性质等资料基础上,选用激发极化测深手段通过电测深曲线特征对比分析、物探数据精准采集、测深成果反演解释以及异常推断等细致的研究过程,基本查清了225 m以浅研究区地层岩性、构造分布等,并推断含水层空间分布情况,可为区域间接寻找浅层地热资源提供支撑,为下一步寻找地热资源布设钻孔提供了充足的依据。

The exploration and development of geothermal resources are of great significance in supporting the green development of the urban economy in Luoyang City.The research area is located in Luoyang Basin,with complex terrain and landform types.Conventional methods have little effect in geothermal exploration,while geophysical exploration methods have the characteristics of low cost,high efficiency,and strong applicability,playing an extremely important role in current geothermal exploration.On the basis of systematically sorting out the terrain and landform,stratigraphic lithology,hydrogeological characteristics,and rock geophysical properties of the study area,induced polarization sounding methods were selected to conduct detailed research processes such as comparative analysis of electrical sounding curve characteristics,accurate collection of geophysical data,inversion interpretation of sounding results,and abnormal inference.The lithology and structural distribution of the strata in the study area within the burial depth of 225 m were basically found out,and the spatial distribution of aquifers was inferred,providing support for indirectly searching for shallow geothermal resources in the region and providing sufficient basis for arranging boreholes for the next step in searching for geothermal resources.