摘要
波动方程深度偏移是解决复杂地质体成像的关键技术,基于波动方程的速度建模为其提供更为精确的速度模型.频率域波形反演是目前研究最为广泛的波动方程速度建模方法之一,它推动了波形反演在勘探尺度下的应用.本文通过对频率域波形反演的实现,分析对比了其有效执行过程中与频率相关的影响因素.介绍了时间域的多尺度反演方法在频率域的一种实现方式,对比分析了输入数据的频点带宽和应用的子波频带范围不同时对反演结果的影响.本文通过设计的山地地质模型对频率域波形反演进行了测试和对比,得到的结论为频率域波形反演的有效计算提供了依据和参考.
The wave equation depth migration methods are the key technologies for complex structure imaging,velocity modeling based on wave equation provides more accurate velocity model.Waveform inversion in frequency domain is one of the most widely studied methods for the wave equation velocity modeling,it promotes the application of waveform inversion in exploration.In this paper,we will analyze some frequency-related factors in waveform inversion that ensure the effectiveness.We introduce an implementation of multi-scale inversion that is widely used in the time domain inversion,analyze the relationship between the choice of frequency point of data,wavelet spectrum band width and the inversion result.we test these methods and factors with a designed mountain model,the conclusion provides a basis and reference for the effective frequency domain waveform inversion in seismic exploration.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第4期1345-1353,共9页
Chinese Journal of Geophysics
基金
国家高技术研究发展计划(863)(2012AA061202)
国家自然科学基金项目(41074095
41104083
40804024)
中央高校基本科研业务费(2011YYL022)联合资助
关键词
频率域波形反演
多尺度
频带宽度
子波
Frequency domain waveform inversion
Multi-scale
Spectrum width
Wavelet
