Simultaneous inversion of seismic scattering and absorption attenuation using coda energies

作     者：Jia WEI Qiancheng LIU Ling CHEN Liang ZHAO 

作者机构：State Key Laboratory of Lithospheric and Environmental CoevolutionInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging TechnologySouthern University of Science and TechnologyShenzhen 518055China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2024年第67卷第12期

页      面：3939-3949页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the National Key R&D Program of China(Grant No.2023YFF0803203) the National Natural Science Foundation of China(Grant Nos.42288201,42404133) the Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology(Grant No.2022B1212010002) the China Postdoctoral Science Foundation(Grant No.2023T160639) 

主　　题：Scattering attenuation Absorption attenuation Simultaneous inversion Coda energy 

摘      要：Simultaneous inversion of scattering and absorption attenuation is of great significance for investigating small-scale inhomogeneities and inelastic properties of the ***,applying this to complex geophysical issues is constrained by the costly computational requirements for simulations and inversions using existing *** coupling effects between the scattering and absorption coefficients cause parameter crosstalk artifacts in multi-parameter inversion,significantly increasing the nonlinearity of the inverse *** paper proposes a robust and effective simultaneous inversion method for scattering and absorption *** propagation of coda energy is modeled using the finite-element method based on the frequency-domain diffusion *** employ the truncated Gauss-Newton technique for the simultaneous estimation of scattering and absorption coefficients to decouple the two attenuation parameters during the inversion ***,the inversion may reach a local minimum if the energy frequency is inappropriate due to a phase mismatch between the simulated and measured *** mitigate this issue,we provide a frequency selection criterion that considers the substantial spectral shift of the energy density spectrum toward lower *** examples using synthetic and experimental data indicate that our method can significantly reduce computational complexity and suppress two-parameter crosstalk without requiring a precise initial attenuation model.