Reverse‐time migration from rugged topography using irregular, unstructured mesh

References

1. Al‐SalehS.M., MargraveG.F. and GrayS.H.2009. Direct downward continuation from topography using explicit wavefield extrapolation. Geophysics74(6), S105–S112.
   [Google Scholar]
2. AlkhalifahT. and BagainiC.2006. Straight‐rays redatuming: A fast androbust alternative to wave‐equation‐based datuming. Geophysics71(3), U37–U46.
   [Google Scholar]
3. BasiI.Z. and McMechanG.A.2007. Topographic corrections to slownesss measurements in parsimonious migration of land data. Geophysics72(2), S77–S80.
   [Google Scholar]
4. BérengerJ.1994. A perfectly matched layer for the absorption of electro‐magnetic waves. Journal of Computational Physics114(2), 185–200.
   [Google Scholar]
5. BerkhoutA.J.1987. Applied Seismic Wave Theory. Elsevier, Amsterdam.
   [Google Scholar]
6. BlackerT.D. and StephensonM.B.1991. Paving: A new approach to automated quadrilateral mesh generation. International Journal for Numerical Methods in Engineering32(4), 811–847.
   [Google Scholar]
7. ChangW.F. and McMechanG.A.1986. Reverse‐time migration of offset vertical seismic profiling data using the excitation‐time imaging condition. Geophysics51, 67–84.
   [Google Scholar]
8. ClappR.G.2009. Reverse time migration with random boundaries. 79th SEG meeting, Houston, USA, Expanded Abstracts, 2809–2813.
9. CollinoF. and TsogkaC.2001. Application of the perfectly matched absorbing layer model to the linear elastodynamic problem in anisotropic heterogenerous media. Geophysics66, 294–307.
   [Google Scholar]
10. CookR.D.1974. Concepts and Applications of Finite Element Analysis. John Wiley & Sons Inc., New York.
    [Google Scholar]
11. DuQ., FaberV. and GunzburgerM.1999. Centroidal Voronoi tessellations, applications and algorithms. SIAM Review41, 637–676.
    [Google Scholar]
12. DuQ. and GunzburgerM.2002. Grid generation and optimization based on centroidal Voronoi tessellations. Applied Mathematics and Computation133, 591–607.
    [Google Scholar]
13. GaoH. and ZhangJ.2006. Parallel 3‐D simulation of seismic wave propagation inheterogeneous anisotropic media: a grid method approach. Geophysical Journal International165, 875–888.
    [Google Scholar]
14. GaoH. and ZhangJ.2008. Implementation of perfectly matched layers in an arbitrary geometric boundary for elastic wave modeling. Geophysical Journal International174(3), 1029–1036.
    [Google Scholar]
15. GrayS.H. and MarfurtK.J.1995. Migration from topography: improving thenear‐surface image. Canadian Journal of Exploration Geophysics31, 18–24.
    [Google Scholar]
16. GuittonA., ValencianoA., BevcD. and ClaerboutJ.2007. Smoothing image condition for shot‐profile migration. Geophysics72(3), S149–S154.
    [Google Scholar]
17. LanH. and ZhangZ.2014. Reverse time migration from irregular surface by flattening surface topography. Tectonophysics627, 26–37.
    [Google Scholar]
18. LawsonC.L.1986. Properties of n‐dimensional triangulations. Computer Aided Geometric Design3, 231–246.
    [Google Scholar]
19. McMechanG.A. and ChenH.W.1990. Implicit static corrections in prestack migration of common‐source data. Geophysics55, 757–760.
    [Google Scholar]
20. NguyenB.D. and McMechanG.A.2013. Excitation amplitude imaging condition forprestack reverse‐time migration. Geophysics78(1), S37–S46.
    [Google Scholar]
21. RajasekaranS. and McMechanG.A.1995. Prestack processing of land data with complex topography. Geophysics60, 1875–1886.
    [Google Scholar]
22. ReshefM.1991. Depth migration from irregular surfaces with depth extrapolation methods. Geophysics56, 119–122.
    [Google Scholar]
23. ShtivelmanV. and CanningA.1988. Datum correction by wave‐equation extrapolation. Geophysics53, 1311–1322.
    [Google Scholar]
24. SymesW.2007. Reverse‐time migration with optimal check pointing. Geophysics72(5), SM213–SM221.
    [Google Scholar]
25. TygelM., SchleicherJ. and HubralP.1994. Pulse distortion in depth migration. Geophysics59, 1561–1569.
    [Google Scholar]
26. VirieuxJ.1986. P‐SV wave propagation in heterogeneous media, velocity–stress finite difference method. Geophysics51, 889–901.
    [Google Scholar]
27. WhitmoreN.1983. Iterative depth migration by backward time propagation. 53rd SEG meeting, Las Vegas, USA, Expanded Abstracts, 382–385.
28. WigginsJ.W.1984. Kirchhoff integral extrapolation and migration of nonplanar data. Geophysics49, 1239–1248.
    [Google Scholar]
29. ZhangJ.2004. Elastic wave modelling in heterogeneous media with high velocity contrasts. Geophysical Journal International159, 223–239.
    [Google Scholar]
30. ZhangJ. and GaoH.2011. Irregular perfectly matched layers for 3D elastic wave modeling. Geophysics76(2), T27–T36.
    [Google Scholar]
31. ZhangJ. and LiuT.1999. P‐SV‐wave propagation in heterogeneous media: grid method. Geophysical Journal International136, 431–438.
    [Google Scholar]
32. ZhangJ., XuJ. and ZhangH.2012. Migration from 3D irregular surfaces:A prestack time migration approach. Geophysics77(5), S117–S129.
    [Google Scholar]
33. ZhangY. and SunJ.2009. Practical issues in reverse‐time migration: True amplitude gathers, noise removal and harmonic‐source encoding. First Break26, 19–25.
    [Google Scholar]