Converted-wave has the potential to be a positive complement of the compressional imaging in some special cases. However, converted wave imaging is more difficult because the need of estimating the background velocity of S-wave. By applying differential semblance to measure the focusing error in the imaging domain, we automatically estimate the background S-wave velocity using reverse-time migration with a given estimated P-wave velocity. Compared to the P-wave, the S-wave velocity estimation via PS imaging gather does not need gradient from the source side. A simple synthetic result demonstrates the feasibility of the proposed method.


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  1. Alkhalifah, T.
    , 2012, Acoustic approximations for processing in transversely isotropic media: Geophysics, 63, 623–631.
    [Google Scholar]
  2. Byrd, R. H., P.Lu, J.Nocedal, and C.Zhu
    , 1995, A limited memory algorithm for bound constrained optimization: SIAM Journal on Scientific Computing, 16, 1190–1208.
    [Google Scholar]
  3. Chang, W.-F., and G. A.McMechan
    , 1994, 3-d elastic prestack, reverse-time depth migration: Geophysics, 59, 597–609.
    [Google Scholar]
  4. Chavent, G.
    , 2010, Nonlinear least squares for inverse problems: theoretical foundations and step-by-step guide for applications: SpringerNetherlands.
    [Google Scholar]
  5. Li, Y., B.Biondi, R.Clapp, and D.Nichols
    , 2014, Wave-equation migration velocity analysis for VTI models: Geophysics, 79, WA59–WA68.
    [Google Scholar]
  6. Plessix, R.-E.
    , 2006, A review of the adjoint-state method for computing the gradient of a functional with geophysical applications: Geophysical Journal International, 167, 495–503.
    [Google Scholar]
  7. Rickett, J., and P.Sava
    , 2002, Offset and angle domain common image point gathers for shot profile migration: Geophysics, 67, 883–889.
    [Google Scholar]
  8. Sava, P., and I.Vlad
    , 2008, Numeric implementation of wave-equation migration velocity analysis operators: Geophysics, 73, VE145–VE159.
    [Google Scholar]
  9. Shabelansky, A. H., A. E.Malcolm, M. C.Fehler, X.Shang, and W. L.Rodi
    , 2015, Source-independent full wavefield converted-phase elastic migration velocity analysis: Geophysical Journal International, 200, 952–966.
    [Google Scholar]
  10. Shen, P.
    , 2004, Wave equation migration velocity analysis by differential semblance optimization: PhD thesis, Rice University.
    [Google Scholar]
  11. Shen, P., and W. W.Symes
    , 2008, Automatic velocity analysis via shot profile migration: Geophysics, 73, VE49.
    [Google Scholar]
  12. Wang, C., J.Cheng, and B.Arntsen
    , 2016, Scalar and vector imaging based on wave mode decoupling for elastic reverse time migration in isotropic and transversely isotropic media: Geophysics, 81, S383–S398.
    [Google Scholar]
  13. Weibull, W., and B.Arntsen
    , 2014, Anisotropic migration velocity analysis using reverse time migration: Geophysics, 79, R13–R25.
    [Google Scholar]
  14. Yan, J., and P.Sava
    , 2008, Isotropic angle-domain elastic reverse-time migration: Geophysics, 73.
    [Google Scholar]
  15. , 2010, Analysis of converted-wave extended images for migration velocity analysis: Seg Technical Program Expanded Abstracts, 4453.
    [Google Scholar]
  16. Zhang, Q., and G. A.McMechan
    , 2011, Common-image gathers in the incident phase-angle domain from reverse time migration in 2d elastic vti media: Geophysics, 76, S197–S206.
    [Google Scholar]

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