1887

Abstract

Summary

Motivated by exactly explaining the numerical instability of attenuation compensation in lossy media, we analytically derive k-space Green’s functions for decoupled constant-Q (DCQ) wave equation and its adjoint equation, then we find that Green’s function for DCQ wave equation is exponentially decreasing, whereas that of adjoint DCQ wave equation is exponentially increasing. These two Green’s functions can be taken as theoretical explanations for the fact that attenuation and compensation are both a nonstationary process with energy exponentially attenuated or amplified over propagation time, especially for high-frequency components. It is this exponential amplification which eventually results in numerical instability of adjoint DCQ wave equation. For a more intuitive understanding about the k-space Green’s functions, we numerically compare them with that of acoustic wave equation.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201701153
2017-06-12
2024-04-20
Loading full text...

Full text loading...

References

  1. Carcione, J.M.
    [2009] Theory and modeling of constant-Q P- and S-waves using fractional time derivatives. Geophysics, 74(1), 1787–1795.
    [Google Scholar]
  2. Carcione, J.M., Cavallini, F., Mainardi, F. and Hanyga, A.
    [2002] Time-domain Modeling of Constant-Q Seismic Waves Using Fractional Derivatives. Pure and Applied Geophysics, 159(7), 1719–1736.
    [Google Scholar]
  3. Chen, H., Zhou, H., Li, Q. and Wang, Y.
    [2016] Two efficient modeling schemes for fractional Laplacian viscoacoustic wave equation. 81(5).
    [Google Scholar]
  4. Kelly, J.F., Mcgough, R.J. and Meerschaert, M.M.
    [2008] Analytical time-domain Green’s functions for power-law media. Journal of the Acoustical Society of America, 124(5), 2861–72.
    [Google Scholar]
  5. Kjartansson, E.
    [1979] Constant Q -wave propagation and attenuation. Journal of Geophysical Research Solid Earth, 84(B9), 4737–4748.
    [Google Scholar]
  6. Li, Q., Zhou, H., Zhang, Q., Chen, H. and Sheng, S.
    [2016] Efficient reverse time migration based on fractional Laplacian viscoacoustic wave equation. Geophysical Journal International, 204(1), 488504.
    [Google Scholar]
  7. Sun, J., Zhu, T. and Fomel, S.
    [2014] Viscoacoustic modeling and imaging using low-rank approximation. Geophysics, 80(5), 5183.
    [Google Scholar]
  8. Treeby, B.E. and Cox, B.
    [2011] A k-space Green’s function solution for acoustic initial value problems in homogeneous media with power law absorption. The Journal ofthe Acoustical Society ofAmerica, 129(6), 3652–3660.
    [Google Scholar]
  9. Treeby, B.E. and Cox, B.T.
    [2010] Modeling power law absorption and dispersion for acoustic propagation using the fractional Laplacian. Journal of the Acoustical Society of America, 127(5), 2741–48.
    [Google Scholar]
  10. [2014] Modeling power law absorption and dispersion in viscoelastic solids using a split-field and the fractional Laplaciana). Journal of the Acoustical Society of America, 136(4), 1499–510.
    [Google Scholar]
  11. Treeby, B.E., Zhang, E.Z. and Cox, B.T.
    [2010] Photoacoustic tomography in absorbing acoustic media using time reversal. Inverse Problems, 26157(26), 115003–20.
    [Google Scholar]
  12. Yang, P., Brossier, R., Métivier, L. and Virieux, J.
    [2016] A review on the systematic formulation of 3-D multiparameter full waveform inversion in viscoelastic medium. Geophysical Journal International, 207(1).
    [Google Scholar]
  13. Zhu, T.
    [2015] Viscoelastic time-reversal imaging. Geophysics, 80(2), A45–A50.
    [Google Scholar]
  14. Zhu, T. and Harris, J.M.
    [2014] Modeling acoustic wave propagation in heterogeneous attenuating media using decoupled fractional Laplacians. Geophysics, 79(3), T105–T116.
    [Google Scholar]
  15. Zhu, T., Harris, J.M. and Biondi, B.
    [2014] Q-compensated reverse-time migration. Geophysics, 79(3), S77–S87.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701153
Loading
/content/papers/10.3997/2214-4609.201701153
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