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 multi-wave 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

Received： 13 November 2017

Corresponding Authors： CHEN Shuangquan, chensq@cup.edu.cn

Cite this article：ZHANG Yichen,CHEN Shuangquan,JIN Song等. Time domain registration of P- and C-waves based on a dynamic time warping algorithm[J]. Petroleum Science Bulletin, 2018, 3(2): 144-153.

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