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Volume 32 Number 3
  • E-ISSN: 1365-2478

Abstract

A

A method for interval velocity analysis is formulated on the basis of wavefield extrapolation, i.e., on the basis of wave‐equation migration. When this scheme is applied to multioffset seismic sections or to an ensemble of CMP gathers, it allows for the proper treatment of dipping events. The underlying assumptions are that local velocities should be derived from data associated with events within the interval under consideration. To minimize the effect of the region above the layer of interest, the data are first extrapolated to the top of the analysis interval. Subsequent analysis of these data then pertains to the events within this interval. Velocity estimation consists of repeated wavefield extrapolations through the analysis interval using a set of trial velocities. The optimal velocity is chosen on the basis of coherency measures designed to express the collective phase agreement among a set of offset Fourier modes. The reliability of this approach to interval velocity estimation is demonstrated on synthetic multi‐offset data.

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2006-04-27
2024-04-24

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References

  1. Born, M. and Wolf, E.1965, Principles of Optics, Pergamon Press, Oxford .
    [Google Scholar]
  2. Clarebout, J. F.1976, Fundamentals of Geophysical Data Processing, McGraw‐Hill, New York .
    [Google Scholar]
  3. Courant, R. and Hilbert, D.1962, Methods of Mathematical Physics, Interscience, New York .
    [Google Scholar]
  4. Gardner, G. H. F., French, W. S. and Matzuk, T.1974, Elements of migration and velocity analysis, Geophysics39, 811–825.
    [Google Scholar]
  5. Gazdag, J.1978, Wave equation migration with the phase shift method, Geophysics43, 1342–1351.
    [Google Scholar]
  6. Gazdag, J. and Sguazzero, P.1984, Migration of seismic data by phase shift plus interpolation, Geophysics49, 124–131.
    [Google Scholar]
  7. Goodman, J. W.1968, Introduction to Fourier Optics, McGraw‐Hill, New York .
    [Google Scholar]
  8. Hubral, P.1975, Locating a diffractor below plane layers of constant velocity and varying dip, Geophysical Prospecting23, 313–332.
    [Google Scholar]
  9. Hubral, P.1977, Time migration—some ray theoretical aspects, Geophysical Prospecting25, 738–745.
    [Google Scholar]
  10. Hubral, P. and Krey, T.1980, Interval Velocities from Seismic Reflection Time Measurements, Society of Exploration Geophysicists, Tulsa .
    [Google Scholar]
  11. Morse, P. M. and Feshbach, H.1953, Methods of Theoretical Physics, McGraw‐Hill, New York .
    [Google Scholar]
  12. Robinson, E. A. and Silvia, M. T.1981, Digital Foundations of Time Series Analysis: Vol. 2, Wave‐Equation Space Time Processing, Holdin‐Day, San Francisco .
    [Google Scholar]
  13. Sattlegger, J. W.1975, Migration velocity determination: Part I, Philosophy, Geophysics40, 1–5.
    [Google Scholar]
  14. Shah, P. M.1973, Use of wavefront curvature to relate seismic data to subsurface parameters, Geophysics38, 812–825.
    [Google Scholar]
  15. Schultz, P. S.1982, A method for direct estimation of interval velocity, Geophysics47, 1657–1671.
    [Google Scholar]
  16. Stolt, R. H.1978, Migration by Fourier transform, Geophysics43, 23–48.
    [Google Scholar]
  17. Taner, M. T., Koehler, F. and Sheriff, R. E.1979, Complex seismic trace analysis, Geophysics44, 1041–1063.
    [Google Scholar]
  18. Yilmaz, O. and Claerbout, J. F.1980, Prestack partial migration, Geophysics45, 1753–1779.
    [Google Scholar]
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  • Article Type: Research Article

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