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[1]YAO Jiaqi,CAO Wenzhong,YE Beng,et al.Effects of Nonlinear Stacking and Zero-phase Processing on Signal Extraction from Airgun Source Waveform[J].Journal of Seismological Research,2017,40(04):581-594.

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Effects of Nonlinear Stacking and Zero-phase Processing on Signal Extraction from Airgun Source Waveform

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 04 Page number: 581-594 Column: 主动源专栏 Public date: 2017-09-20

Title:: Effects of Nonlinear Stacking and Zero-phase Processing on Signal Extraction from Airgun Source Waveform

Author(s):: YAO Jiaqi¹; CAO Wenzhong¹; YE Beng¹; 2; ZHANG Wei³; (1.Laboratory of Seismology and Physics of Earth's Interior,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,Anhui,China)(2.Western Yunnan Earthquake Prediction Study Area,China Earthquake Administration,Dali 6

Keywords:: active source; airgun seismic source; zero-phase processing nonlinear stacking; signal extraction

CLC:: P315.3

DOI:: -

Abstract:: We investigate whether using zero-phase waveform record can reduce the influence of nonlinear stacking on the effective signals extracted from low signal-noise ratio data by evaluating the fitness of traveltime and waveform quantitatively.Then semblance weighted stacking,time-domain phase weighted stacking,time-frequency domain phase weighted stacking and improved time-frequency domain weighted stacking methods are applied to process the synthetic data and real data of air-gun experiment in Binchuan,Yunnan.The results show that:(1)zero-phase processing can significantly improve the data revolution and the onset time picking precision of seismic phase;(2)nonlinear stacking results using zero-phased data show merely effects on effective signals,and the raw records can be recovered by convolution of the stacking results with source wavelet; and(3)time-domain phase weighted stacking or semblance weighted stacking method provide better recovery of final stacking results but probably affect the signals with low signal-noise-ratio,while the results from the phased weighted stacking method based on time-frequency transform method show very large influences on effective signals but give good recovery of signals with low amplitude.

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Last Update: 2017-09-20