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Research on S/N Ratio Increasing of Wide-azimuth Acquired Seismic Data

Author: FengWenXia
Tutor: WangYunZhuan；LiuJieLie
School: Daqing Petroleum Institute
Course: Geological Engineering
Keywords: Wide-azimuth Linear Interference Perturbations Anisotropy Anisotropic NMO
CLC: P631.4
Type: Master's thesis
Year: 2008
Downloads: 86
Quote: 0
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Abstract


Wide-azimuth seismic data refers to the wide-azimuth observation systems seismic data collected manner . Wide-azimuth observation system is capable of receiving a wide area underground wave field more complete information, and to ensure that different azimuthal wave field of the received message underground more balanced treatment in the full three-dimensional imaging to obtain better an amplitude imaging observation system . Wide-azimuth processing wide-azimuth seismic exploration technology is an important part . Among them, improve signal to noise ratio wide-azimuth seismic data processing method is a wide- azimuth processing technology important links. The research projects are on the PC-cluster to cluster Omega processing system as the basis of improving SNR wide-azimuth data starting on the wide-azimuth stacking velocity with azimuth change issues and far linear arrangement of nonlinear problems of interference research. This surface wave and refracted wave interference in wide-azimuth gathers , the Far arranged in linear difficult problems with effective wave division carried out a detailed analysis and research, proposed common shot gathers into different azimuth gathers , in different uses within a common azimuth gathers fx domain coherent noise prediction methods to far arranged nonlinear refraction wave interference into linear problem , and then use it with the significant wave differences in speed and strong coherence , energy and strong features , using the signal to noise separation technology for noise suppression , reaching no harm to suppress the noise bandwidth can improve the SNR purposes. In this paper, the presence of different azimuth NMO velocity difference is proposed anisotropic NMO correction method to solve , and were in the Omega software and Omega2 software research and development of interactive platforms to strike a transversely isotropic (VTI) NMO η field processes, by anisotropic NMO consistent residual statics and surface iterative approach to suppress the noise to improve the accuracy of seismic data processing .

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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