Suppression of internal multiples based on virtual events

LIU Yi, LIU Yang* and LU Qi

Global Geology ›› 2013, Vol. 16 ›› Issue (2) : 113-120.

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PDF(1218 KB)
Global Geology ›› 2013, Vol. 16 ›› Issue (2) : 113-120.
论文

Suppression of internal multiples based on virtual events

  • LIU Yi, LIU Yang* and LU Qi
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Abstract

In practical seismic exploration,internal multiples generated when the wave impedance of medium is strong,and seismic records are recorded. The method of virtual event repress internal multiples is to move scattered points from underground to the surface,similar to the method of the surface-related multiple elimination ( SRME) . The method of SRME belongs to the prediction-subtraction approaches to eliminate internal multiples, prediction method is based on building a brand new way of seismic wave propagation ( virtual reflection and virtual event) ,so that it has forward and backward wave propagation,and through convolution with significant wave to predict the internal multiples. Due to required data needing field information of full-wave,the authors use Seislet transform interpolating the missing data to ensure the premise of internal multiples prediction. The test data show that the above method has achieved good results.

Key words

internal multiples / virtual event / crosscorrelation / Seislet transform

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LIU Yi, LIU Yang* and LU Qi. Suppression of internal multiples based on virtual events[J]. Global Geology. 2013, 16(2): 113-120
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