石油地球物理勘探2019，Vol.54Issue(2)：348-355,前插4,9.DOI:10.13810/j.cnki.issn.1000-7210.2019.02.013
不依赖子波的弹性波混合域全波形反演
Wavelet-independent elastic wave full waveform inversion in hybrid domain
摘要
Abstract
The accuracy of seismic wavelet can directly affect the modeling effect of full waveform inversion.In practice, it is very difficult to get the exact wavelet.In view of this problem,we develop a strategy of elastic wave full waveform inversion in hybrid domain based on the convolution for wavelet-influence removal.Based on the second-order elastic wave stress-displacement equation, we carry out a theoretical calculation of full waveform inversion.The objective function of the full waveform inversion of the elastic wave in hybrid domain is obtained by the multiplication of seismic records with characteristic traces of simulated records and the multiplication of simulated records with characteristic traces of seismic records.The theoretical formula of the reverse source is derived.Finally,numerical calculations on the Overthrust model obtain good inversion results, which verify the feasibility of the proposed approach in hybrid domain.关键词
全波形反演/弹性波方程/混合域/子波/褶积Key words
full waveform inversion/elastic wave equation/ hybrid domain/wavelet/convolution分类
天文与地球科学引用本文复制引用
杨涛,张会星,史才旺..不依赖子波的弹性波混合域全波形反演[J].石油地球物理勘探,2019,54(2):348-355,前插4,9.基金项目
本项研究受国家重点研发计划项目"声信号对极区冰层和海底的响应及其声学参数观测技术"(2018YFC1405900)、国家自然科学基金项目"OBN宽频多分量地震资料的纵横波联合逆时偏移方法研究"(41674118)、"部分饱和孔隙介质中地震波的衰减和频散机理研究"(41204089)和国家科技重大专项"东海深层大型气田勘探评价技术"(2016ZX05027-002)联合资助. （2018YFC1405900）
