摘要
地震波传播的复杂性所引起的地震反演中强烈的非线性问题是目前全波形反演在技术上遇到的最大难题,了解全波形反演中不同的目标函数随不同物性参数的不同摄动尺度的变化性态,对选择合理的反演方法和反演策略具有重要意义.本文参照Jannane等对波形反演目标函数性态的分析方法,通过变密度声波方程,分析了多种地震数据子集的不同目标函数随物性参数的摄动尺度的变化关系,重点分析了它们的非线性程度,为进行分步骤、分尺度全波形反演方法和反演策略的选择提供了理论指导.
The main difficulty in seismic full-waveform inversion is the strong nonlinearity, which is caused by the complexity of seismic wave propagation. The analysis of the behavior of the objective function variation with the parameter perturbation scale can help us to choose the reasonable inversion method and strategy. According to Jannaners method to analyze the objective function behavior, the relationship between the objective function calculated by different seismic data subset and the parameter perturbation scale is studied, especially the nonlinearity. The analysis results will provide some theoretical guidance for FWI to implement the multi-step and multi-scale inversion strategy.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第10期3445-3460,共16页
Chinese Journal of Geophysics
基金
国家自然科学基金(41274116)
国家油气重大专项(2011ZX05005-005-007HZ)联合资助
关键词
全波形反演
目标函数
摄动尺度
非线性
反演策略
数据子集
Full-waveform inversion, Objective function, Perturbation scale, Nonlinearity,Inversion strategy, Seismic data subset
