西南石油大学学报(自然科学版)

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Eliminating Oceanic Seismic Data Multiples in West Madagascar Sea

Xia Changliang1,2*, Li Zhenyong2, Dai Dong2   

  1. 1. School of Geophysics and Information Technology,China University of Geosciences(Beijing),Haidian,Beijing 100083,China
    2. Geophysical Research Institute,BGP,CNPC,Zhuozhou,Hebei 072750,China
  • Online:2015-12-01 Published:2015-12-01

Abstract:

Multiple eliminating is always the difficult stage of oceanic seismic data processing. The oceanic seismic data processing
of west Madagascar sea has become difficult because of great changes at sea bottom,abnormal growth of multiples and
multiples attenuation. This paper analyzes the method and principle of SRME(Surface Related Multiple Elimination)related to
free surface,predictive deconvolution and parabolic Radon transformation. According to the characteristics of methods above,
we make a united solution,that is using SRME to eliminate the surface related multiples,using predictive deconvolution to
attenuate the multiples generated between layers and using parabolic Radon transformation to eliminate the residual multiples.
The processing results after applying above methods show that the progressively united multiple solution can do a good job in
oceanic seismic data multiple elimination,especially for those whose sea bottom depth changes in great range.

Key words: data processing, oceanic multiple, SRME, predictive deconvolution, Radon filtering

CLC Number: