1887

Abstract

Summary

The full-waveform inversion approach is applied to 3D VSP data for reconstructing an orthorhombic medium that is an effective representation of an elastic vertically transverse isotropic (VTI) medium with fracture-induced anisotropy. The aim of this work is to perform a feasibility study of recovering anisotropic parameters for horizontally layered media near the borehole. In some cases, the azimuthal angle of fractures (i.e. the symmetry axis of anisotropy) can be known inexactly, so it is necessary to invert also for the angle of fractures. The data from walk-around VSP acquisition with an addition of zero-offset data is enough to recover all orthorhombic parameters and the azimuth angle successfully.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201412907
2015-06-01
2024-04-27
Loading full text...

Full text loading...

References

  1. Bakulin, A., Grechka, V. and Tsvankin, I.
    [2000] Estimation of fracture parameters from reflection seismic data-part II: Fractured models with orthorhombic symmetry. Geophysics, 65(6), 1803–1817.
    [Google Scholar]
  2. Baydin, V.
    [2013] Reverse-time migration with correct extrapolation of pressure and shear waves in borehole seismic. Seismic Technology, 3, 11–15.
    [Google Scholar]
  3. Campbell, A., Leaney, S., Gulati, J., Leslie-Panek, J. and Von Lunen, E.
    [2013] Images, anisotropy, multiples, and more from an unconventional 3D VSP. The Leading Edge, 32(10), 1238–1244.
    [Google Scholar]
  4. Charara, M., Barnes, C. and Tarantola, A.
    [1996] Constrained seismic well data waveform inversion. Inverse methods: Interdisciplinary elements of methodology, computation and application: Lecture Notes in Earth Science, 63, 98–112.
    [Google Scholar]
  5. Dovgilovich, L. and Sofronov, I.
    [2014] High-accuracy finite-difference schemes for solving elastodynamic problems in curvilinear coordinates within multiblock approach. Applied Numerical Mathematics, in press.
    [Google Scholar]
  6. Jílek, P., Hornby, B. and Ray, A.
    [2003] Inversion of 3D VSP P-wave data for local anisotropy: A case study. 2003 SEG Annual Meeting, Society of Exploration Geophysicists.
    [Google Scholar]
  7. Podgornova, O., Leaney, S., Charara, M. and Lunen, E.V.
    [2014] Elastic full waveform inversion for land walkaway VSP data from British Columbia, Canada. 76th EAGE Conference & Exhibition.
    [Google Scholar]
  8. Podgornova, O., Charara, M. et al.
    [2011] Multiscale time-domain full-waveform inversion for anisotropic elastic media. 2011 SEG Annual Meeting, Society of Exploration Geophysicists.
    [Google Scholar]
  9. Schoenberg, M. and Helbig, K.
    [1997] Orthorhombic media: Modeling elastic wave behavior in a vertically fractured earth. Geophysics, 62(6), 1954–1974.
    [Google Scholar]
  10. Tarantola, A.
    [1987] Inverse problem theory: methods for data fitting and model parameter estimation.
    [Google Scholar]
  11. Ting, T.C. and Horgan, C.
    [1996] Anisotropic elasticity: theory and applications. Journal of Applied Mechanics, 63, 1056.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201412907
Loading
/content/papers/10.3997/2214-4609.201412907
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