1887

Abstract

Summary

Conventional NMO correction applied to CMP gathers with long-offset usually causes wavelet stretching that debases the frequency content of the NMO corrected data. In order to reduce the phenomenon of dynamic correction stretching, this paper starts from the time-distance curve and uses Chebyshev polynomial truncation equation. Using matching pursuit algorithm, the Ricker wavelet is used as the atom to determine the control parameters, and the scanning range is determined by instantaneous characteristics. The improved matching pursuit algorithm is used in the model and field data, Results indicate that this method provides nonstretched NMO data with relatively higher precision.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801111
2018-06-11
2024-04-25
Loading full text...

Full text loading...

References

  1. Buchholtz, H.
    [1972] A note on signal distortion due to dynamic (NMO)corrections. Geophysics, 20, 395–405.
    [Google Scholar]
  2. DingFan, JinhaiZhang, ZhenxingYao
    . [2011] Optimized Chebyshev method for normal moveout of long-offset seismic data. Progress in Geophysics, 26(3), 836–842.
    [Google Scholar]
  3. Rupert, G. B., and J. H.Chun
    , [1975] The block move sum normal moveout correction. Geophysics, 40, 17–24.
    [Google Scholar]
  4. Shatilo, A., and F.Aminzadeh
    . [2000] Constant normal-moveout (CNMO) correction: A technique and test results. Geophysical Prospecting, 48, no. 3, 473–488.
    [Google Scholar]
  5. Wang, Y.
    [2010] Multichannel matching pursuit for seismic trace decomposition. Geophysics, 75, no. 4, V61–V66.
    [Google Scholar]
  6. XiaoK, ZhangF, ZhangX.
    [2017] The absorption and compensation method of pre-stack seismic data based on the matching pursuit algorithm. International Geophysical Conference, 17–20.
    [Google Scholar]
  7. Zhang, B., K.Zhang, S.Guo, and K. J.Marfurt.
    [2013] Nonstretching NMO correction of prestack timemigrated gathers using a matching-pursuit algorithm. Geophysics, 78, no. 1, U9–U18.
    [Google Scholar]
  8. ZhangJ H, WangW M, WangS Q.
    [2011] Optimized Chebyshev Fourier migration:A wide-angle dual-domain method for media with strong velocity contrasts. Geophysics75(2), S23–S34.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801111
Loading
/content/papers/10.3997/2214-4609.201801111
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error