CSAMT法在汤池地热温泉勘探中的应用

Application of CSAMT in Tangchi Geothermal Spring Prospecting

以湖北省汤池地热勘查项目作为实例,对CSAMT方法从原理、野外工作方法、数据处理技术等方面进行详细的介绍,并对其找水效果、方法优缺点进行分析评价。与传统找水方法相比,该方法勘探深度大、分辨率高,数据处理后得到的电阻率断面图能真实地反映地下电性结构。特别是勘探区地下含水构造,与围岩有明显的电性差异,CSAMT法勘探结合定性分析可间接为寻找地下热水资源提供靶区。CSAMT方法在地热温泉勘探中具有不可替代的优势,其在汤池地热温泉勘探中的应用经验在类似找水项目中具有示范和推广意义。

Controlled source audio frequency magnetotelluric method （CSAMT） has been widely used in the exploration of geothermal water resources at home and abroad. This article taking TangChi geothermal survey project as an example, introduces the method principle of CSAMT, field working method, data processing technology etc. in detail. analyses the effects of prospecting water, merits and faults of different methods. From the point of view later drilling results, compared with the traditional methods, CSAMT is of great exploration depth, high resolution. Resistivity section after data process- ing can reflect the true underground electrical structure. Especially there are obvious electric difference between the un- derground water bearing structure of exploration area and the surrounding rock. This can be done by qualitative analysis, indirectly provide target area for underground water resources. The advantage CSAMT in exploration of geothermal hot springs is irreplaceable. It has demonstration and popularization significance in similar hot spring water survey project.