1887

Abstract

Summary

The reflection and transmission (R/T) responses characterize the subsurface local property. The widespread anisotropy has considerable influences for the amplitude. Although the transversely isotropic media with horizontal symmetry axis (HTI) is the simplest azimuthal anisotropy model, it characterizes the common structures containing a set of vertical fractures. In this paper, we consider the layered HTI media with nonaligned symmetry axes. We first estimate the accurate R/T coefficients scaled by the vertical energy flux. Under the assumption of weak contrast across the interface, a simple layered HTI model is perturbed to approximate the R/T coefficients for the general layered HTI model. The isotropic background medium is also considered for weakly anisotropic models. Numerical tests are used to qualify the proposed approximations.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201900811
2019-06-03
2020-05-26
Loading full text...

Full text loading...

References

  1. Aki, K. and Richards, P. G.
    [1980] Quantitative seismology. Theory and methods. W. H. Freeman & Co.
    [Google Scholar]
  2. Fryer, G. J., and Frazer, L. N.
    [1987] Seismic waves in stratified anisotropic media - II. Elastodynamic eigensolutions for some anisotropic systems. Geophysical Journal International, 91, 73–101.
    [Google Scholar]
  3. Jílek, P.
    [2002] Converted PS-wave reflection coefficients in weakly anisotropic media. Pure and Applied Geophysics, 159, 1527–1562.
    [Google Scholar]
  4. Rüger, A.
    [1998] Variation of P-wave reflectivity with offset and azimuth in anisotropic media. Geophysics, 63, 935–947.
    [Google Scholar]
  5. Stovas, A., and Ursin, B.
    [2003] Reflection and transmission responses of layered transversely isotropic viscoelastic media. Geophysical Prospecting, 51, 447–477.
    [Google Scholar]
  6. Vavryčuk, V., and Pšenčík, I.
    [1998] PP-wave reflection coefficients in weakly anisotropic elastic media. Geophysics, 63, 2129–2141.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900811
Loading
/content/papers/10.3997/2214-4609.201900811
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