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

Abstract

ABSTRACT

Seismic migration can be formulated in terms of two consecutive downward extrapolation steps: refocusing the receivers and refocusing the sources. Applying only the first focusing step with an estimate of the focusing operators results in a common focal point (CFP) gather for each depth point at a reflecting boundary. The CFP gathers, in combination with the estimates of the focusing operators, can be used in an iterative procedure to obtain the correct operators. However, current 3D seismic data acquisition geometries do not contain the dense spatial sampling required for calculation of full 3D CFP gathers. We report on the construction of full 3D CFP gathers using a non‐full 3D acquisition geometry. The proposed method uses a reflector‐orientated data infill procedure based on the azimuthal redundancy of the reflection data. The results on 3D numerical data in this paper show that full 3D CFP gathers, which are kinematically and dynamically correct for the target event, can be obtained. These gathers can be used for iterative updating of the 3D focusing operators.

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2004-11-02
2024-04-24
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References

  1. Al‐YahyaK.1989. Velocity analysis by iterative profile migration. Geophysics54, 718–729.DOI: 10.1190/1.1442699
    [Google Scholar]
  2. AminzadehF., BurkhardJ.M., LongJ., KunzT. and DuclosP.1996. Three dimensional SEG/EAGE models – an update. The Leading Edge15, 131–134.DOI: 10.1190/1.1437283
    [Google Scholar]
  3. BerkhoutA.J.1997a. Pushing the limits of seismic imaging, part I: prestack migration in terms of double dynamic focusing. Geophysics62, 937–953.
    [Google Scholar]
  4. BerkhoutA.J.1997b. Pushing the limits of seismic imaging, part II: integration of prestack migration, velocity estimation and avo analysis. Geophysics62, 954–969.
    [Google Scholar]
  5. BerkhoutA.J.1999. Multiple removal based on the feedback model. The Leading Edge18, 127–131.
    [Google Scholar]
  6. BerkhoutA.J. and VérschuurD.J.2000. Internal multiple removal boundary‐related and layer‐related approach. 62nd EAGE conference, Glasgow , Scotland , Extended Abstracts, L56.
  7. BolteJ.F.B.2003. Estimation of focusing operators using the common focal point method . PhD thesis, Delft University of Technology .
  8. BolteJ., VerschuurD. and HeggeR.1999. CFP operator estimation and inversion demonstrated on a field data set, part I: Operator updating. 69th SEG meeting, Houston , USA , Expanded Abstracts, 1711–1714.
  9. CoxB.E. and VerschuurD.J.2003. Tomographic inversion of 3D focusing operators using data‐driven parametrization. 65th EAGE conference, Stavanger , Norway , Extended Abstracts, D32.
    [Google Scholar]
  10. GisolfA. and VerschuurD.2002. 3D focusing operator estimation from sparse 3D data. 64th EAGE conference, Florence , Italy , Extended Abstracts, E018.
    [Google Scholar]
  11. HeggeR., DuijndamA., BolteJ. and FokkemaJ.1999. CFP operator estimation and inversion demonstrated on a field data set, part II: Velocity estimation. 69th SEG meeting, Houston , USA , Expanded Abstracts, 1500–1503.
  12. HeggeR.F., FokkemaJ.T. and DuijndamA.J.W.1998. Using focusing operators to estimate velocity models. 68th SEG meeting, New Orleans , USA , Expanded Abstracts, 1608–1611.
  13. HubralP., SchleicherJ. and TygelM.1996. A unified approach to 3D seismic reflection imaging, part I: Basic concepts. Geophysics61, 742–758.DOI: 10.1190/1.1444001
    [Google Scholar]
  14. KabirM.M.N. and VerschuurD.J.2000. A constrained parametric inversion for velocity analysis based on the CFP technology. Geophysics65, 1210–1222.DOI: 10.1190/1.1444813
    [Google Scholar]
  15. MortonS.A.1996. Automating prestack migration analysis using common focal point gathers. 66th SEG meeting, Denver , USA , Expanded Abstracts, 411–414.
  16. ThorbeckeJ.W.1997. Common focus point technology . PhD thesis, Delft University of Technology .
  17. VidaleJ.E.1990. Finite‐difference calculation of traveltimes in three dimensions. Geophysics55, 521–526.DOI: 10.1190/1.1442863
    [Google Scholar]
  18. WapenaarC.P.A., GoudswaardJ. and Van WijngaardenA.J.1999. Multi‐angle, multiscale inversion of migrated seismic data. The Leading Edge18, 928–932.DOI: 10.1190/1.1438409
    [Google Scholar]
  19. WinthaegenP.L.A. and VerschuurD.J.2001. CFP‐approach to time‐lapse angle‐dependent reflectivity analysis. 71st SEG meeting, San Antonio , Texas , USA , Expanded Abstracts, 1580–1583.
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