电磁波CT在岩性划分、岩溶勘查中的应用

Application of Electromagnetic Wave CT in Lithological Division and Karst Exploration

溶洞、裂隙带发育是在碳酸盐岩地区修建水库不可避免的一大难题,因此查明岩性界线及岩溶发育情况尤为重要。电磁波CT是利用电磁波在不同介质中传播特性的不同来确定地下介质孔间分布的一种物理勘查方法。以某水库岩溶发育段为工程背景,通过现场试验数据统计分析并综合钻孔电视及编录资料,分析该方法在岩性划分及岩溶勘查方面的应用效果,进而为防渗灌浆设计提供可靠的依据。

The development of karst caves and fractured zones is an unavoidable difficult problem in the construction of reservoirs in carbonate rock areas.Therefore,it is very important to find out lithological boundary and karst development.Electromagnetic wave CT is a physical exploration method,which uses the different propagation characteristics of electromagnetic waves in different media to determine the distribution of boreholes in underground media.Taking karst section of a reservoir as engineering background,this paper makes statistical analysis on field test data,drilling television and catalog data.The application effect of this method in lithological division and karst exploration is analyzed to provide reliable basis for seepage-proof grouting design.