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Key technologies for processing marine seismic data from sparker sources and their applications |
ZHANG Xing-Yan( ), ZENG Wei-Hui, LIU Jin-Peng, ZHANG Li-Xia, DU Guang-Hui, WANG Fa-Kun |
Geophysical Research Institute, Geophysical Division, COSL, Zhanjiang 524075, China |
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Abstract Marine seismic data from sparker sources exhibit strong noise interference, complex wavelet morphologies, signal distortion due to cables' feathering and undulation, and severe multiple wave interference, all of which greatly affect the imaging quality of seismic data. Based on the characteristics of marine seismic data from sparker sources, this study established a data processing workflow and elaborated on the key technologies involved, including LIFT high-fidelity noise suppression, cable drift correction, surface-consistent simulated annealing static correction, wavelet processing, and free surface multiple suppression technologies. The application to actual data indicates that this processing workflow can effectively address the challenges associated with marine seismic data from sparker sources, improve the signal-to-noise ratio, restore the wavelet bandwidth, and produce seismic sections with superior broadband imaging and clearly defined geological features. This study provides a novel technical means for the application of marine wide-azimuth seismic data.
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Received: 24 May 2024
Published: 26 February 2025
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Basic flow of simulated annealing surface consistent residual statics
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Schematic diagram of LIFT noise suppression
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Shot gather of low frequency and surge noise attenuation
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Stack section of low frequency and surge noise attenuation
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Shot gather of linear noise attenuation
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Stack section of linear noise attenuation
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Comparison of the effect before and after cable drift correction for marine electric spark source data
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Comparison of the effect before and after simulated annealing surface consistency residual static of marine spark source data
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Comparison of the effect before and after marine electric spark source data SRME multiple wave suppression
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Wavelet of electric spark source and its spectrum
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Comparison of the effect before and after wavelet processing of marine electric spark source data
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Migration profile before and after noise suppression in marine electric spark source data
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The offset effect of cable drift correction for marine electric spark source data
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Migration effect of wavelet processing on marine electric spark source data
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