利用可控源音频大地电磁测深法获得地热田勘查资料解译效果探讨  

Discussion on interpretation of geothermal field exploration data by CSAMT method

作　　者：龚胜平[1,2] 刘瑞德 GONG Shengping;LIU Ruide(Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources,Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,Hebei,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,自然资源部地球物理电磁法探测技术重点实验室,河北廊坊065000 [2]中国地质大学(北京),北京100083

出　　处：《矿产勘查》2021年第2期362-367,共6页Mineral Exploration

基　　金：国家重点研发计划项目(编号:2018YFE0208300);重要金属非金属矿产地质调查计划项目(编号:DD20190571)联合资助。

摘　　要：我国地热资源以中低温地热为主,成因类型多为传导型,其中以沉积盆地隆起型地热田分布最多。这类地热田面积大,资源储量丰富,紧邻城市周边,利用率高,经济效益潜力巨大。目前地热田勘查以电磁法为主,利用电阻率参数解译深部地层分布及断裂构造展布,预测热储构造位置,进而指导钻孔布置。发现热储构造的关键是勘查资料的成功解译。本文对3处地热田的可控源音频大地电磁测深勘查解译实例进行探讨,认为在断裂构造附近且地表2000 m以下深部电阻率值高低变化明显部位为地热勘探的有利位置。The geothermal resources in China are mainly medium and low temperature geothermal resources,and most of the genetic types are conductive types.Among them the uplift geothermal fields in sedimentary basins are the most widely distributed.This type of geothermal field has a large area,abundant resource reserves,close to the periphery of the city,high utilization rate,and huge potential for economic benefits.At present,geothermal field surveys mainly deployed electromagnetic methods,using resistivity parameter to interpret deep stratum and fault structure distribution,predict the location of thermal storage structures,and then guide drilling layout.The key to the discovery of the thermal storage structure is the successful interpretation of the survey data.This article discusses the interpretation of the controllable source audio magnetotelluric sounding survey in three geothermal fields.It is believed that near the fault structure and the resistivity value below the surface to 2000 m obviously changes from below to high are favorable locations for geothermal exploration.

关 键 词：地热田 电磁法勘查 资料解译 可控源 

分 类 号：P631.3􀆰[天文地球—地质矿产勘探]