中深部矿产资源勘探井中阵列激电方法研究  

Research on borehole array induced polarization method for middle-deep mineral resources exploration

作　　者：柳建新[1,2] 黄朝宇 汪强强 佟利群 刘海飞[1,2] 刘昕 赵莹杰 LIU Jianxin;HUANG Chaoyu;WANG Qiangqiang;TONG Liqun;LIU Haifei;LIU Xin;ZHAO Yingjie(Hunan Key Laboratory of Nonferrous Resources and Geological Disaster Exploration,Central South University,Changsha 410083,China;School of Geoscience and Information Physics,Central South University,Changsha 410083,China;Land Space Survey and Monitoring Institute of Hunan Province,Changsha 410129,China;Shanxi Railway Engineering Survey Co.,Ltd,Xi'an 710000,China;Hulun Buir emergency management bureau of Inner Mongolia,Hulunbuir 021000,China)

机构地区：[1]中南大学有色资源与地质灾害探查湖南省重点实验室,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083 [3]湖南省国土空间调查监测所,长沙410129 [4]陕西铁道工程勘察有限公司,西安710000 [5]内蒙古自治区呼伦贝尔市应急管理局,呼伦贝尔021000

出　　处：《物探化探计算技术》2023年第6期773-782,共10页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金重点项目(42130810);国家自然科学基金面上项目(41774149);湖南省重点研发计划项目(2020SK2058)。

摘　　要：激发极化法具有观测参数多、观测装置灵活以及对电子导电矿物反应灵敏等特点,在矿产资源勘探中优势明显。为提高激电法对中深部矿产资源的探测能力,这里借助井地观测空间与钻孔揭露的地质信息,系统研究了井中激电阵列观测方法、正演模拟与反演成像技术。首先,设计了两种井中激电阵列观测方法;然后,推导了连续介质模型井中激电2.5维有限元正演模拟的理论公式,给出了井中激电多装置联合约束反演的线性方程;最后,对复杂地电模型的模拟数据和水槽实验数据进行反演试算,验证了本文研究的井中阵列激电法在中深部矿产资源勘探的可行性。The induced polarization method has many characteristics,such as observation parameters,flexible observation device,and sensitive response to mineral resources,and is particularly advantageous in the exploration of mineral resources in the middle and deep areas.This paper conducts a systematic and in-depth study on the observation method,forward and inversion theory and method of the IP in the well.Firstly,two kinds of observation arrays of IP methods in the well are designed.Then,the theoretical formula of 2.5-d finite element forward modeling for the induced polarization method based on a continuous medium model is derived,and the linear equation of joint constraint inversion of resistivity and induced polarization data acquired in the well is given.Finally,through the inversion calculation of the complex geoelectric model and the experimental data of the flume,the feasibility of the well-inducing method in the middle and deep mineral resources is verified.

关 键 词：金属矿产勘探 井中激电法 正演模拟 约束反演 

分 类 号：P631.3[天文地球—地质矿产勘探]