1887
Volume 52, Issue 6
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The use of the differential semblance misfit function on common‐image‐point gathers in the angle domain lends itself to an automated tomographic approach through a gradient‐based search in the model space. The velocity model is described by a layer‐based model with linear velocity trends and a superimposed bicubic B‐spline. The interfaces of the layer‐based model are computed by map migration of the PP zero‐offset traveltimes of key reflectors. The common‐image‐point gathers are produced by a restricted inverse generalized Radon transform or amplitude‐versus‐angle‐compensated migration. We present a complete description of all 2.5D formulae for isotropic velocity analysis of PP reflections and the results for ocean‐bottom seismic data.

Loading

Article metrics loading...

/content/journals/10.1111/j.1365-2478.2004.00438.x
2004-11-02
2024-04-24
Loading full text...

Full text loading...

References

  1. Al‐YahyaK.1989. Velocity analysis by iterative profile migration. Geophysics54, 718–729.DOI: 10.1190/1.1442699
    [Google Scholar]
  2. BeylkinG. and BurridgeR.1990. Linearized inverse scattering problems in acoustics and elasticity. Wave Motion12, 15–52.
    [Google Scholar]
  3. BleisteinN.1986. Two‐and‐one‐half dimensional in‐plane wave propagation. Geophysical Prospecting34, 686–703.
    [Google Scholar]
  4. Brandsberg‐DahlS., De HoopM.V. and UrsinB.1999. Velocity analysis in the common scattering‐angle/azimuth domain. 69th SEG meeting, Houston , USA , Expanded Abstracts, 1222–1223.
  5. Brandsberg‐DahlS., De HoopM.V. and UrsinB.2003a. Focusing in dip and AVA compensation on scattering‐angle/azimuth gathers. Geophysics68, 232–254.
    [Google Scholar]
  6. Brandsberg‐DahlS., UrsinB. and De HoopM.V.2003b. Seismic velocity analysis in the scattering angle/azimuth domain. Geophysical Prospecting51, 295–314.
    [Google Scholar]
  7. BunksC., SaleckF.M., ZaleskiS. and ChaventG.1995. Multiscale seismic waveform inversion. Geophysics60, 1457–1473.
    [Google Scholar]
  8. ČervenýV.2001. Seismic Ray Theory . Cambridge University Press.
    [Google Scholar]
  9. ChaurisH. and NobleM.2001. Two‐dimensional velocity macro model estimation from seismic reflection data by local differential semblance optimization: application to synthetic and real data sets. Geophysical Journal International144, 14–26.
    [Google Scholar]
  10. FarraV. and MadariagaR.1987. Seismic waveform modeling in heterogeneous media by ray perturbation theory. Journal of Geophysical Research92, 2697–2712.
    [Google Scholar]
  11. FossS.K. and UrsinB.2004. 2.5D modelling, inversion and angle migration in anisotropic elastic media. Geophysical Prospecting52, 65–84.
    [Google Scholar]
  12. GjøystdalH. and UrsinB.1981. Inversion of reflection times in three‐dimensions. Geophysics46, 972–983.
    [Google Scholar]
  13. De HoopM.V. and BleisteinN.1997. Generalized Radon transform inversions for reflectivity in anisotropic elastic media. Inverse Problems13, 669–690.
    [Google Scholar]
  14. HubralP. and KreyT.1980. Interval Velocities from Seismic Reflection Time Measurements . Society of Exploration Geophysicists .
    [Google Scholar]
  15. KleynA.H.1977. On the migration of reflection‐time contour maps. Geophysical Prospecting25, 125–140.
    [Google Scholar]
  16. PlessixR.‐E., Ten KroodeF. and MulderW.2000. Automatic cross‐well tomography by differential semblance optimization: theory and gradient computation. Geophysical Prospecting48, 913–935.
    [Google Scholar]
  17. SymesW. and CarazzoneJ.1991. Velocity inversion by differential semblance optimization. Geophysics56, 654–663.
    [Google Scholar]
  18. TenorioL.2001. Statistical regularization of inverse problems. SIAM Review43, 347–366.
    [Google Scholar]
  19. TygelM., SchleicherJ. and HubralP.1994. Pulse distortion in depth migration. Geophysics59, 1561–1569.
    [Google Scholar]
  20. UrsinB.2004. Parameter inversion and angle migration in anisotropic elastic media. Geophysics, in press.
    [Google Scholar]
  21. XuS., ChaurisH., LambaréG. and NobleM.2001. Common‐angle migration: A strategy for imaging complex media. Geophysics66, 1877–1894.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/j.1365-2478.2004.00438.x
Loading
/content/journals/10.1111/j.1365-2478.2004.00438.x
Loading

Data & Media loading...

  • Article Type: Research Article

Most Cited This Month Most Cited RSS feed

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