卫星热红外遥感技术在东平县地热资源调查中的应用

Application of the satellite thermal infrared remote sensing technology in geothermal resource survey in Dongping County

地热资源是一种绿色低碳、可循环利用的清洁能源,地热异常圈定是确定地热资源靶区的重要前提,热红外遥感技术能够直观反演地表温度信息,能够宏观、客观地反映地热资源异常信息。本次基于东平县1985年5月24日和1987年9月19日的Landsat-5卫星遥感数据热红外波段,采用大气校正法进行地表温度反演,结合水文地质调查、地温场调查及地下水动态监测等综合手段,圈定3处Ⅰ级地热资源遥感异常区及1处Ⅱ级地热资源遥感异常区。异常查证发现,接山镇Ⅰ级地热资源遥感异常区、老湖镇Ⅰ级地热资源遥感异常区、梯门镇Ⅰ级地热资源遥感异常区均呈现不同程度的地温异常,且均有隐伏断裂穿过,地温异常是由隐伏断裂将热量传递、汇集至构造位置所形成。林马庄Ⅱ级地热资源遥感异常区浅部未发现地热异常,但不排除深部存在地热资源的可能性。该方法克服了传统方法周期长、费用高等缺点,为地热资源异常识别提供了一条新的思路。

Geothermal resource is a kind of green,low-carbon,recyclable and clean energy,geothermal anomaly delineation is an important prerequisite for determining the target area of geothermal resources.Thermal infrared remote sensing technology can directly invert the surface temperature information,and can reflect the abnormal information of geothermal resources macroscopically and objectively.Using Landsat-5 TM remote sensing images of Dongping County on May 24,1985 and September 19,1987,based on the inversion of surface temperature by atmospheric correction method,combined with hydrogeological survey,geothermal field survey,groundwater dynamic monitoring and other comprehensive means,3 remote sensing anomaly areas of grade I geothermal resources and 1 remote sensing anomaly area of grade II geothermal resources are delineated.The anomaly investigation found that the grade I remote sensing anomaly areas of geothermal resources in Jieshan Town,Laohu Town and Timen town all present different degrees of geothermal anomalies,and all of them have hidden faults passing through,the ground temperature anormaly is predicted to be formed by the heat transfer and collection of hidden faults to the structural location.No geothermal anomaly has been found in the shallow part of the remote sensing anomaly area of Linmazhuang grade II geothermal resources,but the possibility of geothermal resources in the deep part cannot be ruled out.This method overcomes the shortcomings of traditional methods,such as long cycle and high cost,and provides a new idea for the anomaly identification of geothermal resource.