综合物探技术在碳酸盐岩地区地下水勘查中的应用

Application of comprehensive geophysical exploration technology to groundwater exploration in carbonate rock area

我国西南地区是国内碳酸盐岩主要分布区域,而西南地区严重缺水,又运输不便,因此探索碳酸盐岩地区地下水勘查技术具有重要研究意义。物探技术是目前地下水勘查中的重要手段之一,但单一的物探手段具有多解性,因此本文研究综合物探方法应用,多种方法相互验证、取长补短。以安徽巢湖典型的碳酸盐岩地区为试验区,对区内已知的地质、磁法、电法资料进行重新分析解译,圈定可能储水构造位置,然后采用音频大地电磁法确定构造产状、埋深等,最后通过微动探测技术进行精确定钻,后期钻探验证成功见水。整体研究工作量少,成本低,效果显著,极具推广意义。

The southwest of China is the main distribution area of carbonate rocks,and the southwest of China is seriously short of water and inconvenient to transport.Therefore,it is of great significance to explore the exploration technology of groundwater in carbonate rocks.Geophysical exploration technology is one of the important means in groundwater exploration at present,but a single geophysical exploration means has multiple solutions.Therefore,this paper studies the application of comprehensive geophysical exploration methods,and various methods verify each other and learn from each other.Taking the typical carbonate rock area of Chaohu Lake in Anhui province as the test area,the known geological,magnetic and electrical data in the area were re-analyzed and interpreted,and the possible water storage structure location was defined.Then,the structure occurrence and burial depth were determined by audio magnetotelluric method.Finally,the micro-motion detection technology was used to determine the precise drilling.The overall research work is less,the cost is low,the effect is remarkable,and it is of great significance to popularize.