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Modeling elastic wave forward propagation and reflection using the complex screen method.

X B Xie1, R S Wu

  • 1Institute of Geophysics and Planetary Physics, University of California, Santa Cruz 95064, USA.

The Journal of the Acoustical Society of America
|June 27, 2001
PubMed
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This study introduces a new computational method for seismic wave propagation in 3D elastic media. The complex-screen method efficiently calculates forward and backscattering, offering a fast and accurate seismic modeling solution.

Area of Science:

  • Geophysics
  • Computational Seismology
  • Wave Propagation

Background:

  • Accurate modeling of seismic wave propagation in heterogeneous elastic media is crucial for geophysical exploration.
  • Existing methods often face challenges with computational efficiency and handling multiple scattering phenomena.

Purpose of the Study:

  • To develop an efficient and accurate computational method for calculating forward propagation and reflection in 3D elastic structures.
  • To address limitations in handling multiple forward scattering and single backscattering in heterogeneous models.

Main Methods:

  • Formulation of forward propagation and reflection using the complex-screen method.
  • Application of the local Born approximation for reflection calculations.
  • Utilizing a small angle approximation to simplify the backscattering operator.

Related Experiment Videos

  • Integration of forward propagator and backscattering operator for comprehensive scattering analysis.
  • Employing a dual-domain technique for computational efficiency.

    • Main Results:

    • The developed method effectively handles multiple forward scattering and single backscattering in 3D heterogeneous models.
    • The dual-domain technique leads to significant CPU time and memory savings.
    • Synthetic seismograms generated by this method align well with finite-difference results for 2D elastic models.
    • The method demonstrates good performance for small to medium scattering angles and velocity contrasts.

    Conclusions:

    • The complex-screen method provides a fast and accurate algorithm for seismic modeling, particularly when reverberation and resonance scattering are negligible.
    • This approach offers a viable solution for seismic wave propagation and reflection calculations in complex geological structures.
    • The method's efficiency and accuracy make it suitable for various geophysical applications.