摘要：Full waveform inversion (FWI) plays a central role in the field of seismic processing due to the advantage in recovering the properties of the subsurface from seismograms. However, it suffers from more local minima convergence and more serious nonlinearity than the conventional seismic inversion method mainly caused by the lack of low-frequency information in the seismic data or the low-wavenumber components in the starting model. In this letter, we present a novel technique for seismic FWI based the angle difference identity for cosine, which builds an internal connection between high- and low-frequency signals. Thus, we can use the high-frequency information to get a plausible recovery of the low-wavenumber velocity. In addition, we choose the amplitude-independent objective function, which is given by maximizing the crass correlation between the modeled and observed data, to deal with the imperfect amplitude matching in the real case. Finally, a synthetic example of SEG/EAGE salt model is employed to demonstrate the validity of the proposed method, when low-frequency signals are absent.

关键字：Amplitude-independent objective function angle difference identity for cosine full waveform inversion (FWI) low-frequency signal low-wavenumber components

ISSN号：1545-598X

卷、期、页：卷: 16 期: 7 页: 1125-1129

发表日期：2019-07-01

影响因子：2.761000

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）,EI（工程索引）

发表期刊名称：IEEE Geoscience and Remote Sensing Letters

通讯作者：王官超

第一作者：袁三一,王尚旭

论文类型：期刊论文

论文概要：王官超,袁三一,王尚旭，Retrieving Low-Wavenumber Information in FWI: An Efficient Solution for Cycle Skipping，IEEE Geoscience and Remote Sensing Letters，2019，卷: 16 期: 7 页: 1125-1129

论文题目：Retrieving Low-Wavenumber Information in FWI: An Efficient Solution for Cycle Skipping