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| The method and application of seismic data phase difference analysis |
| SHANG Xin-Min |
| Geophysical Prospecting Institute, Shengli Oilfield, Sinopec, Dongying 257022, China |
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Abstract In order to fit diverse conditions of complex surface area, researchers usually jointly use different kinds of sources and detectors for acquisition. The working mode difference between various acquisition systems results in varied wavelet phases which influence the stacking effect seriously. In this paper, the accurate phase of seismic wavelet was obtained by using bispectrum based on high order statistics to reconstruct the mixed-phase spectrum of the wavelet. When there are two seismic data with complete waveform consistency, the cross-correlation result was performed as zero-phase wavelet, otherwise, it was expressed as non-zero-phase wavelet. The phase difference between the two seismic data could be determined by determining the difference between non zero-phase wavelet and zero-phase wavelet. The results show that the vibrator and explosives have 90° phase difference, the velocity detector and piezoelectric detector show 90° phase difference, and the difference between air gun and vibrator is uncertain.
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Received: 06 August 2013
Published: 10 August 2014
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