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首页» 过刊浏览» 2018» Vol. 3» Issue (2) -     DOI : doi: 10.3969/j.issn.2096-1693.2018.02.015
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基于动态时间规整算法的纵波与转换波时间域匹配
张一琛1, 2,陈双全1, 2*,靳松1, 2,李向阳1
Time domain registration of P- and C-waves based on a dynamic time warping algorithm
ZHANG Yichen1, 2, CHEN Shuangquan1, 2, JIN Song1, 2, LI Xiangyang1

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摘要  纵波与转换波数据由于传播路径和传播时间的不同,来自同一反射界面的地震波的运动学特征和动力学特征均不同。因此,纵波与转换波数据进行匹配是一个强非线性反演的过程。论文针对多波地震数据中不同时间域的纵波与转换波匹配问题,基于动态时间规(Dynamic time warping, DTW)算法,形成了纵波与转换波数
据时间域匹配方法和实际数据处理技术流程。从经典的动态时间规整算法入手,改进完善了算法流程以适用于纵波与转换波数据的时间域匹配。在实际数据处理中,首先通过设定初始纵横波速度比,对纵波与转换波数据的预匹配,使纵波与转换波数据满足应用动态时间规整算法的条件。然后,对转换波数据采用动态时间规整算法求取时移量,完成将其从转换波时间域匹配到纵波时间域的过程。经实际多波地震数据的应用,文中提出的纵波与转换波数据时间域匹配方法和技术流程,可以很好地解决纵波与转换波数据匹配过程中的非线性问题,而且在匹配过程中不需要进行层位的控制或约束,就可以达到很好的匹配效果。
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关键词 : 转换波匹配;动态时间规整;非线性反演;速度比;联合解释
Abstract

As the travel path and time differ between the P-wave and converted-wave (C-wave), the kinematic and dynamic
characteristics of seismic waves that from the same reflective subsurface layer will be different. Therefore, the event registration
of P- and C-wave seismic datasets is a nonlinear inversion process. In this paper, based on the dynamic time warping (DTW)
algorithm, we propose a time registration method and real field processing workflow for the time domain matching of P- and
C-waves. By reviewing the classical DTW algorithm, an improved algorithm is implemented for the seismic data time domain
matching of P- and C-waves. For the real field data processing, by setting a constant velocity ratio of P- and S-waves, the C-wave
seismic data is first transferred to the P-wave time domain to meet the conditions of using the DTW algorithm. In the second
step, the time shifts are inverted via the improved DTW algorithm. Finally, the time domain matching of P-wave and C-waves
is implemented by using the computed time shifts. The application of the proposed method and workflow to a real field multiwave
seismic dataset indicates that the method is feasible to handle the nonlinear problem in the P- and C-wave seismic data time
matching. Moreover, we can achieve a value matching result without using the events of P- and C-wave data to constrain the
registration processing.

Key words: converted-wave registration; dynamic time warping (DTW); nonlinear inversion; velocity ratio; joint interpretation
收稿日期: 2018-06-29     
PACS:    
基金资助:国家自然科学基金项目(41574108) 和国家油气重大专项课题(2017ZX05018-005) 联合资助
通讯作者: chensq@cup.edu.cn
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