1887

Abstract

Summary

Knowledge of orthotropic velocity anisotropy in a sedimentary basin can facilitate application of advanced methods in processing and interpretation of large offset-wide azimuth seismic data. Here, we model an orthotropic medium in a succession of VTI layers by adding vertical fractures to a VTI host layer and measure P-wave velocities in a synthetic radial VSP experiment. We invert P-wave velocities for orthotropic parameters and show that to obtain valid results, line spacing of (maximum) 10 degrees and source-receiver offsets of no less than the depth of orthotropic layer are essential.

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/content/papers/10.3997/2214-4609.201901040
2019-06-03
2020-04-07
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References

  1. Asgharzadeh, M., Bóna, A., Pevzner, R., Urosevic, M. and Gurevich, B.
    [2013] Estimation of orthorhombic anisotropy from 3D VSP, CO2CRC Otway project: 75th EAGE Conference & Exhibition, Extended Abstracts, WEP1105.
    [Google Scholar]
  2. Collet, O., Gurevich, B., Madadi, M. and Pervukhina, M.
    [2014] Modeling elastic anisotropy resulting from the application of triaxial stress. Geophysics, 79(5), C135–C145.
    [Google Scholar]
  3. Schoenberg, M. and Helbig, K.
    [1997] Orthorhombic media: Modeling elastic wave behavior in a vertically fractured earth. Geophysics, 62(6), 1954–1974.
    [Google Scholar]
  4. Schoenberg, M. and Sayers, M.
    [1995] Seismic anisotropy of fractured rock. Geophysics, 60(1), 204–211.
    [Google Scholar]
  5. Winterstein, D. F.
    [1990] Velocity anisotropy terminology for geophysicists: Geophysics, 55, 1070–1088.
    [Google Scholar]
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