石油物探2025，Vol.64Issue(2)：264-270,7.DOI:10.12431/issn.1000-1441.2023.0325
基于层位和动态时间调整的精细快慢横波时差求取
Calculation of precise time delay between fast and slow shear waves based on horizons and DTW
摘要
Abstract
The particle motion in a shear wave is perpendicular to the direction of propagation.An incident shear wave propagating in fracture-induced anisotropic media will split into a fast shear wave and a slow one,which is referred to as shear-wave splitting.The time delay between the fast and slow waves,which is generally proportional to fracture density,may be calculated using two methods:manual horizon picking and cross correlation.Due to the low signal-to-noise(S/N)ratio of shear-wave data,any single method cannot yield desired results.Therefore,we propose a horizon-based method for precise calculation.Large-scale time delays will be calculated first based on marker horizon tracking.For secondary horizons between two makers,a dynamic time warping(DTW)algorithm is used to calculate small-scale time delays.The time delays of both scales would then be combined for the time correction of slow shear waves.A case study confirms the effectiveness of the method for shear-wave data with low S/N ratio.关键词
快横波/慢横波/时差/时间匹配/层位/动态时间调整Key words
fast shear wave/slow shear wave/time delay/time registration/horizon/dynamic time warping(DTW)分类
天文与地球科学引用本文复制引用
张铁强,孙鹏远,钱忠平,岳媛媛,聂红梅,张文波..基于层位和动态时间调整的精细快慢横波时差求取[J].石油物探,2025,64(2):264-270,7.基金项目
中国石油天然气集团有限公司重大科技专项"多物理场高精度油气地球物理探测技术与装备研究"课题"多波场地震成像与弹性参数同步反演理论与技术"(2023ZZ05-02)资助. This research is financially supported by the Basic Research Project of CNPC(Grant No.2023ZZ05-02). （2023ZZ05-02）
