Seismic random noise attenuation using artificial neural network and wavelet packet analysis |
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| Authors: | R Kimiaefar H R Siahkoohi A R Hajian A Kalhor |
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| Institution: | 1.Department of Geophysics, Science and Research Branch,Islamic Azad University,Tehran,Iran;2.Institute of Geophysics,University of Tehran,Tehran,Iran;3.Department of Physics, Najafabaad Branch,Islamic Azad University,Isfahan,Iran;4.Faculty of New Sciences and Technologies,University of Tehran,Tehran,Iran |
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| Abstract: | In this paper, we present a method for attenuating background random noise and enhancing resolution of seismic data, which takes advantage of semi-automatic training of feed forward back propagation (FFBP) artificial neural network (ANN) in a multiscale domain obtained from wavelet packet analysis (WPA). The images of approximations and details of the input seismic sections are calculated and utilized to train neural network to model coherent events by an automatic algorithm. After the modeling of coherent events, the remainder data are assumed to be related to background random noise. The proposed method is applied on both synthetic and real seismic data. The results are compared with that of the adaptive Wiener filter (AWF) in synthetic shot gather and real common midpoint gather and also with that of band-pass filtering on real common offset gather. The comparison indicates substantially higher efficiency of the proposed method in attenuating random noise and enhancing seismic signals. |
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