1887

Abstract

Summary

Imaging of multi-component seismic data requires separation/decomposition of P- and S-waves. Traditional separation methods damage the amplitude and phase information of the input wavefield. We propose a set of spatial filters to perform PS decomposition of isotropic elastic wavefield, which preserves the vector information of the input wavefield. The spatial filters are transformed from the wavenumber domain multipliers, and tuned with a convolutional neural network to improve accuracy. The spatial filters are robust and efficient to be applied. Tests with synthetic data show satisfactory PS decomposition results.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201901046
2019-06-03
2024-04-19
Loading full text...

Full text loading...

References

  1. Aki, K. and Richards, P.G.
    [1980] Quantitative seismology, theory and methods. W. H. Freeman and Co.
    [Google Scholar]
  2. Ma, D. and Zhu, G.
    [2003] P- and S-wave separated elastic wave equation numerical modeling (in Chinese). Oil Geophysical Prospecting, 38, 482–486.
    [Google Scholar]
  3. Paffenholz, J., McLain, B., Zaske, J. and Keliher, P.J.
    [2002] Subsalt multiple attenuation and imaging: Observations from the Sigsbee2B synthetic dataset. In: SEG. Expanded Abstracts, 2122–2125.
    [Google Scholar]
  4. Sun, R. and McMechan, G.A.
    [2001] Scalar reverse-time depth migration of prestack elastic seismic data. Geophysics, 66, 1518–1527.
    [Google Scholar]
  5. Wang, W. and McMechan, G.A.
    [2015] Vector-based elastic reverse-time migration. Geophysics, 80, S245–S258.
    [Google Scholar]
  6. Wang, W., McMechan, G.A. and Zhang, Q.
    [2015] Comparison of two algorithms for isotropic elastic P and S vector decomposition. Geophysics, 80, T147–T160.
    [Google Scholar]
  7. Yan, J. and Sava, P.
    [2008] Isotropic angle-domain elastic reverse-time migration. Geophysics, 73, S229–S239.
    [Google Scholar]
  8. [2009] Elastic wave-mode separation for VTI media. Geophysics, 74, WB19–WB32.
    [Google Scholar]
  9. Zhang, Q. and McMechan, G.A.
    [2010] 2D and 3D elastic wavefield vector decomposition in the wavenumber domain for VTI media. Geophysics, 75, D13–D26.
    [Google Scholar]
  10. Zhu, H.
    [2017] Elastic wavefield separation based on the Helmholtz decomposition. Geophysics, 82, S173–S183.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201901046
Loading
/content/papers/10.3997/2214-4609.201901046
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