CSAMT法在费县地热勘查中的应用

Application of CSAMT Method in Geothermal Exploration in Feixian County

摘要:

以费县地热勘查项目为实例，从原理、野外工作方法、数据处理等方面，对可控源音频大地电磁测深法（CSAMT法）进行了详细的介绍，对其找水效果、方法优缺点进行了分析评价。认为该方法探测深度大、纵向分辨率高、效率高，数据处理后得到的电阻率断面图能够真实地反映地下电性结构。该文利用可控源音频电磁法在费县进行地热资源勘查，通过前期实地踏勘，对测区的水文地质资料及地热成因进行了综合分析，查明了勘查区内主要构造位置、产状、规模、深度，为地热资源的勘查开发提供依据。

Abstract:

Setting exploration of geothermal project in Feixian County as an example, from the aspects of principle, from the aspects of field working method, data processing, the controlled source audio frequency magnetotelluric method (CSAMT method) has been introduced in detail. The effect for searching water, advantages and disadvantages of the method have been analyzed and evaluated. The method has the advantages of large detection depth, high vertical resolution and high efficiency, and the resistivity cross section can be truly reflected by the data processing. The geothermal resources in Feixian County has been explored by using controlled source audio magnetotelluric method. Through field investigation, combining with hydrogeological data analysis and the origin of geothermal sourecs, tectonic location, occurrence, size and depth of exploration area have been identified. It will provide the basis for the development of geothermal resources exploration.