沉积层结构被动源探测方法及其在典型盆地的应用  

Advances in passive seismic analysis of sediment structure and applications in some typical basins

作　　者：张瑞青[1] 况春利 张笑晗 李永华[1] Zhang Ruiqing;Kuang Chunli;Zhang Xiaohan;Li Yonghua(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA,Wuhan 430071,China;Hubei Earthquake Agency,Wuhan 430071,China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震局地震研究所地震大地测量重点实验室,武汉430071 [3]湖北省地震局,武汉430071

出　　处：《地球与行星物理论评（中英文）》2023年第1期12-26,共15页Reviews of Geophysics and Planetary Physics

基　　金：国家自然科学基金资助项目(41874073,U1839210)。

摘　　要：准确的沉积层结构,对盆地地区油气资源调查与勘探、地震动场地效应评估和壳幔深部结构成像等研究均具有重要意义.近二十年来,随着地震观测技术的进步和大量流动台阵数据的积累,利用被动源资料探测沉积层结构的地震学方法研究取得了长足的发展.本文对这些主要方法进行了归纳总结,阐述了基本原理及相关进展.其中,基于远震体波数据的研究方法主要有:接收函数和转换函数、波场反延拓的H-β方法、以及P波质点运动分析等.基于近场体波资料约束沉积层结构通常采用的是高频波形拟合方法.此外,还简要介绍了谱比法、背景噪声面波成像和Rayleigh波Z/H幅度比,以及多种方法的联合反演.最后,对我国东部典型盆地地区,如松辽盆地和华北盆地下方沉积层结构已取得的研究进展进行了总结.Accurate constraints on sediment structure are of great importance for investigation and exploration of oil and gas resources,evaluation of site response,and imaging of deep crust and mantle structure.With the advance of seismic observation and the accumulation of large data from portable arrays,seismological methods using passive source to resolve sediment structures with high resolution have developed.In this paper,we review the advances in the seismological analyses and their basic principles,including receiver functions,transfer functions,H-βtechnique based on wavefield downward continuation,and P-wave particle motion using teleseismic data.Waveform fitting with high frequency is usually used for sediment structure constraints from local earthquakes.In addition,we also briefly review the analyses of spectral ratio,ambient noise tomography,Rayleigh wave Z/H amplitude ratio,and their joint inversion.Finally,we summarize the progress of research work on the structure of the shallow crust beneath the Songliao and North China basins based on these methods.

关 键 词：沉积层 接收函数 H-β方法 P波质点运动 背景噪声成像 Rayleigh波Z/H幅度比 谱比法 

分 类 号：P315[天文地球—地震学]