地面核磁共振方法和高密度电阻率法联合找水  

Combined Use of Surface Nuclear Magnetic Resonance and Electrical Resistivity Imaging in Detecting Groundwater

作　　者：潘剑伟[1] 占嘉诚 洪涛 王海红 李钦泽 李振宇[1] Pan Jianwei;Zhan Jiacheng;Hong Tao;Wang Haihong;Li Qinze;Li Zhenyu(Institute of Geophysicsand Geomatics, China University of Geosciences（Wuhan）, Wuhan 430074, Chin)

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,武汉430074

出　　处：《地质科技情报》2018年第3期253-262,共10页Geological Science and Technology Information

基　　金：国家"973计划"重大工程灾变滑坡演化与控制的基础研究(2011CB710606)

摘　　要：地面核磁共振方法是目前唯一能直接找水的地球物理方法,高密度电阻率法则是当前应用较广泛的找水方法,2种方法的联合使用能为解决找水问题提供不同的地球物理依据,可以在找水功能上达到优势互补:高密度电阻率法反演得到的地层电阻率分布,为地面核磁共振方法反演时电阻率参数的设定提供了信息,使反演的结果更加准确;地面核磁共振方法可以识别高密度电阻率法确定的低阻异常是否因含水而引起,并能定量地反演出含水层的深度、厚度、单位体积含水量等信息。同时,高密度电阻率法兼具电剖面法和电测深法的功能,其结果可以弥补地面核磁共振方法横向分辨率上的不足。2种方法的工作原理不同,对工作环境的要求也不同,其联合使用能在一定程度上解决单独使用某种方法时的工作环境限制问题。在湖北安陆某找水工作中,2种方法的组合使用取得了良好的效果,证明了这种组合模式的有效性和实用性。The surface nuclear magnetic resonance（SNMR）method is the only geophysical method that can detect the water directly,while the electrical resistivity imaging is a widely used method to probe the water.The combination of these two methods provides a better mode for water exploration and can provide different geophysical basis in water exploration.At the same time,these two methods can complement each other.The distribution of underground resistivity inversed by electrical resistivity imaging method can provide guidance for setting up resistivity parameters in the inversion process of surface nuclear magnetic resonance method,so that the inversion result is more accurate.Conversely,the SNMR method can determine whether the low resistivity structures of electrical resistivity imaging are caused by water or not.Furthermore,the inversion result of SNMR method can collect quantitatively information such as depth,thickness and water content of the aquifers.The electrical resistivity imaging is a 2 D profile method,whose result can enhance the lateral resolution of SNMR method.These two methods work in different ways and have different requirements on the work environment.The combined use of these two methods can solve the problem of work environment restriction to some extent.The combined use of these two methods is proved practical and effective in the water exploration work in Anlu,Hubei.

关 键 词：地面核磁共振 高密度电阻率法 联合找水 分辨率 含水量 

分 类 号：P631.2[天文地球—地质矿产勘探]