基于全波形采样的激电多信息提取方法研究与应用  

Study and application on induced polarization multi-parameter information extraction method based on the full waveform sampling technology

作　　者：李建华 林品荣[1,2,3] 何畏 郑采君[1,2,3] 丁卫忠[1,2,3] 刘昕卓 LI Jian-hua;LIN Pin-rong;HE Wei;ZHENG Cai-jun;DING Wei-zhong;LIU Xin-zhuo(Laboratory of Geophysical Electromagnetic Probing Technologies,Ministry of Land and Resources,Langfang 065000,China;Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Science,Langfang 065000,China;National Center for Modern Geological Exploration Engineering and Technology Research,Langfang 065000,China)

机构地区：[1]自然资源部地球物理电磁法探测技术重点实验室,廊坊065000 [2]中国地质科学院地球物理地球化学勘查研究所,廊坊065000 [3]国家现代地质勘查工程技术研究中心,廊坊065000

出　　处：《地球物理学进展》2020年第1期132-138,共7页Progress in Geophysics

基　　金：深地资源勘查开采重点专项(2018YFC0603201);国家高技术研究发展计划(863)课题(2014AA06A610);基础性公益性地质矿产调查专项(DD20160046,DD20190556)联合资助.

摘　　要：激电法是地质勘查中的一种重要方法,时、频域测量各具优势,但传统的时、频域测量实现方法相对独立.根据频域和时域可相互转换的理论,本文提出一种基于全波形采样的时频激电多参数提取的地球物理数据处理方法.采取时间域激电法的观测模式,接收机高精度同步记录整周期电压-电流全部采样点的波形数据,通过该文提出的处理方法,仅一次供电和测量即可提取多种时、频域激电参数:时域激电的视电阻率、视极化率和频域激电的多频视电阻率、视相位、视频散率、去耦后的视相位等参数.在云南保山某典型矿区开展方法的试验应用,提取了地质体大量的相关激电信息,总结了目标体的激电参数响应规律.应用结果表明,该方法便捷高效,抗干扰能力强,相较于传统的时域激电测量,多种参数组合可提升对目标地质体的认识,增强激电法的应用效果.Induced Polarization(IP)is an important method in geological exploration.Each of the Time Domain Induced Polarization(TDIP)and Frequency Domain Induced Polarization(FDIP)has its advantages,but the realization method is relatively independent and separated.Based on the transformation theory of frequency domain and time domain,this paper proposes a data processing method of TDIP/FDIP multi-parameter extraction based on full waveform sampling.By taking TDIP observation model,receiver record all sampling points of the high precision synchronous voltage-current waveform data in a whole cycle,which facilitates the subsequent processing of raw data and extraction of more IP information.Using this method,only through one power supply and measuring,a variety of time and frequency domain IP parameters can be extracted:the apparent resistivity,apparent chargeability of TDIP and multi-frequency apparent resistivity,apparent phase,apparent dispersion and decoupling phase of FDIP.In this paper,we carry out full-waveform time-domain IP measurement in the typical metal mining area in Yunnan,extract a large number of related IP information,and summarize the response law of IP parameters of different target bodies.The experimental results show that this method is convenient and efficient,and the antiinterference ability is strong,and the combination of various parameters can enhance the understanding of the geologic target and improve the application effect of the method.

关 键 词：时间域激电 频率域激电 全波形采样 多信息提取 

分 类 号：P631[天文地球—地质矿产勘探]