基于全区视电阻率瞬变电磁一维正演中滤波系数的选取  

Selection of Filter Coefficient in One-dimensional Forward of Transient Electromagnetic Method Based on All-time Apparent Resisivity

作　　者：郭嵩巍 郑凯[2] 刘小畔 王成[4] 王淼[5] GUO Song-wei;ZHENG Kai;LIU Xiao-pan;WANG Cheng;WANG Miao(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,China;Institute Geology and Mineral Resources Exploration of Zhejiang Province,Hangzhou 310000,China;School of Geophysics,Chengdu University of Technology,Chengdu 610059,China;Inner Mongolia Land Resources Exploration and Development Co.,Ltd.,Hohhot 010020,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]长江大学地球物理与石油资源学院,武汉430100 [3]浙江省地矿勘探院,杭州310000 [4]成都理工大学地球物理学院,成都610059 [5]内蒙古国土资源勘查开发有限责任公司,呼和浩特010020

出　　处：《科学技术与工程》2021年第3期911-917,共7页Science Technology and Engineering

基　　金：国家重点研发计划项目(2017YFC0601900)。

摘　　要：为提高瞬变电磁正反演数值计算的效果和效率,选取合适的数值滤波系数是关键。通过建立参照模型,选用正演数值计算效果良好的3组汉克尔变换滤波系数和3组余弦变换滤波系数,对比分析了其不同组合正演的计算效率、精度和有效范围。利用瞬变响应的平移伸缩特性提出参数模型法,实现了针对实测数据的滤波系数选取的估算,经过反演测试,最终得出了基于全区视电阻率的最佳滤波系数组合。In order to improve the effect and efficiency of numerical calculation of transient electromagnetic forward and inversion,it is the key to select an appropriate numerical filtering coefficient.By establishing a reference model,three groups of Hankel transform filter coefficients and three groups of cosine transform filter coefficients with good calculation results were selected to compare and analyze the calculation efficiency,accuracy and effective range of their different combination forward modeling.The reference model method which based on characteristic of translational expansion and contraction was proposed to estimate the filtering coefficient for measured data.Finally,the best filter coefficient combination based on all-time resisitivity was obtained through inversion test.

关 键 词：瞬变电磁法 汉克尔变换 余弦变换 全区视电阻率 参照模型 

分 类 号：P631.421[天文地球—地质矿产勘探]