摘要：Normal-moveout (NMO) correction is one of the most important routines in seismic processing. NMO is usually implemented by a sample-by-sample procedure; unfortunately, such implementation not only decreases the frequency content but also distorts the amplitude of seismic waveforms resulting from the well-known stretch. The degree of stretch increases with increasing offset. To minimize severe stretch associated with far offset, we use a dynamic time warping (DTW) algorithm to achieve an automatic dynamic matching NMO nonstretch correction, which does not handle crossing events and convoluted events such as thin layers. Our algorithm minimizes the stretch through an automatic static temporal correction of seismic wavelets. The local static time shifts are obtained using a DTW algorithm, which is a nonlinear optimization method. To mitigate the influence of noise, we evaluated a multitrace window strategy to improve the signal-to-noise ratio of seismic data by obtaining a more precise moveout correction at far-offset traces. To illustrate the effectiveness of our algorithm, we first applied our method to synthetic data and then to field seismic data. Both tests illustrate that our algorithm minimizes the stretch associated with far offsets, and the method preserves the amplitude fidelity.
© 2018 Society of Exploration Geophysicists. All rights reserved.

ISSN号：0016-8033

卷、期、页：v 83,n 1,pV27-V37

发表日期：2018-01-01

影响因子：2.391000

期刊分区（SCI为中科院分区）：三区

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

发表期刊名称：Geophysics

参与作者：王仰华

通讯作者：靳松

第一作者：陈双全,李向阳

论文类型：期刊论文

论文概要：陈双全,靳松,李向阳,王仰华，Nonstretching normal-moveout correction using a dynamic time warping algorithm，Geophysics，2018，v 83,n 1,pV27-V37

论文题目：Nonstretching normal-moveout correction using a dynamic time warping algorithm