可控源音频大地电磁测深法在地热勘探中的应用  

Application of controllable source audio frequency magnetotelluric sounding in geothermal exploration

作　　者：李鹏[1] 刘丽丛 Li Peng;Liu Licong(Tianjin Geothermal Exploration Development and Design Institute,Tianjin 300250,China;Inner Mongolia Geological Environment Monitoring,Huhhot 010020,China)

机构地区：[1]天津地热勘查开发设计院,天津300250 [2]内蒙古自治区地质环境监测院,内蒙古呼和浩特010020

出　　处：《能源与环保》2021年第6期126-132,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：内蒙古西部断裂发育,地热资源丰富,由于工区内未开展过系统性的地热资源勘查工作,缺少地热钻孔地质资料积累,为查明工区地层结构、断裂特征、热储类型及埋藏条件,为地热井部署提供依据,研究在区域地质、地球物理、地热条件等前期研究成果的基础上,对内蒙西部某地的地热资源采用可控源音频大地电磁法进行可行性勘查,基本查明了工区地层结构、埋深及厚度、导热通道断裂构造的产状、空间展布、热储层埋深等,根据圈定的地热异常远景区,建议部署2处地热勘探井有利位置。通过在工区内首次开展系统性的地热资源勘查,勘查成果为地热资源钻井的井位、设计井深提供了基础资料。The western part of Inner Mongolia has developed faults and rich geothermal resources.Since no systematic geothermal resource exploration has been carried out in the work area,there is a lack of geothermal drilling geological data accumulation.In order to find out the stratigraphic structure,fracture characteristics,thermal storage types and burial conditions of the work area,the well deployment provided a basis for the study on the basis of the regional geology,geophysics,geothermal conditions and other preliminary research results,the use of controllable source audio magnetotelluric method for the feasibility survey of geothermal resources in a certain place in western Inner Mongolia,and basically found out the stratum of the work area according to the delineated geothermal anomaly prospects,it was recommended to deploy two geothermal exploration wells in favorable locations based on the structure,burial depth and thickness,occurrence of the thermal conduction channel fault structure,spatial distribution and thermal reservoir burial depth.Through the first systematic survey of geothermal resources in the work area,the survey results have provided basic data for the location and design depth of geothermal resource drilling.

关 键 词：地球物理 可控源音频大地电磁 地热 电性特征 断裂 热储层 

分 类 号：P631.3[天文地球—地质矿产勘探]