多源频率域地震勘探技术及应用  

Multi-source frequency-domain seismic exploration technique and its application

作　　者：孙红林[1] 刘铁华[1] 刘铁[1] 张占荣[1] 陈支兴 SUN Hong-Lin;LIU Tie-Hua;LIU Tie;ZHANG Zhan-Rong;CHEN Zhi-Xing(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《物探与化探》2024年第3期618-628,共11页Geophysical and Geochemical Exploration

基　　金：湖北省重点研发计划项目(2021BAA050);国家重点研发计划项目(2019YFC0605101)。

摘　　要：在城市地球物理勘探中,因受到城市中各种强电磁机械干扰和交通建筑阻隔,诸多地球物理勘探技术勘探效果不佳。本文基于瞬态面波、微动台阵和微动谱比,采用多点三分量低频传感器获取的多源频率域地震数据,综合提取两种特征曲线后进行联合反演,实现融合3种技术的多源频率域地震勘探。其中,提出了双源综合频散谱提取技术、双源特征曲线联合反演技术和基于非均匀介质的等效均匀介质正演技术,勘探成果的精度和效率均得到了提高,在工程实践中得到验证。Due to various strong electromagnetic mechanical interference and traffic barriers,many geophysical exploration techniques are ineffective in urban geophysical exploration.Based on transient surface waves,microtremor arrays,and microtremor spectral ratios,this study synthetically extracted two kinds of characteristic curves for joint inversion from the multi-source frequency-domain seismic data obtained by multi-point three-component low-frequency sensors.Consequently,this study achieved multi-source frequency-domain seismic exploration that integrated three techniques and developed the two-source synthetic dispersive spectrum extraction technique,the two-source characteristic curve joint inversion technique,and the equivalent homogeneous medium forward modeling technique based on inhomogeneous media.Engineering practice results demonstrate the improvements in the exploration accuracy and efficiency.

关 键 词：多源频率域地震勘探 瞬态面波 微动台阵 微动谱比 

分 类 号：P631.4[天文地球—地质矿产勘探]