地球物理方法在带状热储地热资源调查中的应用——以湖南省汝城县热水镇朱屋区为例  

The application of geophysical methods in the investigation of geothermal resources with banded reservoir——Taking an example of Zhuwu favorable area,in Hot Water town,Rucheng county,Hunan province

作　　者：赵宝峰 汪启年[1] 陈同刚 ZHAO Baofeng;WANG Qinian;CHEN Tonggang(Geological Exploration Technology Institute of Anhui Province,Hefei 230041,China)

机构地区：[1]安徽省勘查技术院

出　　处：《物探化探计算技术》2019年第6期806-812,共7页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：带状热储地热资源是我国东南沿海地区重要的地热类型之一,其发现依赖地球物理方法对断裂系统和热储构造的有效识别。这里利用高精度重力测量、可控源音频大地电磁测深(CSAMT)和浅层地震三种方法,在地表无热异常的第四系覆盖区,确定了不同走向断裂的分布,发现了热储构造。结果显示,该热储位于走向NE、NW和NE的三组断裂交汇点附近,埋深约500 m,在电法剖面上显示为椭圆状电性低阻体,上下均与断裂沟通,顶部浅钻显示26℃温度异常。以上发现说明在负向地形的地下水排泄区,通过不同地球物理方法多层次断裂系统的构建,借助电法对含水破碎带识别的优势,可在带状热储地热资源调查区寻找到潜在的地热资源。The geothermal resource with banded reservoir is one of the important geothermal type in the southeastern coastal areas of China, and its discovery depends on the effectively identify to faults system and thermal reservoir structure by geophysical methods. This paper identifies the distribution of different trend faults and finds a thermal reservoir structure by three methods of high-precision gravity measurement, controlled source audio frequency magnetotelluric and shallow seismic reflection in the place where is no thermal anomalies and the quaternary covered on the surface. The result shows that the thermal reservoir which located near the intersection of three trends faults of NE, NW and NE, displayed as an elliptical electrical low resistance body in the electrical profiles, buried depth at about 500m, and communicated with faults and an abnormal temperature of 26 °C shows at the top by shallow drill. The above finding indicates that we can find geothermal resource by building a multi-level faults system with different geophysical methods and using the advantage of electric method for identification of water-bearing faults zone in the banded-reservoir geothermal resource survey area where is negative terrain of the groundwater discharge zone.

关 键 词：带状热储 地热资源 地球物理勘查 汝城县 

分 类 号：P331[天文地球—水文科学]