1887

Abstract

Summary

Prestack migration by equivalent offsets and common scatterpoint (CSP) gathers is used to velocity model estimation. In order to minimize migration noise and not introduce distortion into the wavelet, it is necessary to identify the optimal migration aperture. The reason for choosing the migration aperture is usually information about the a priori velocity model. The paper suggests a method for optimizing the aperture of the migration, based on an information of the first reflecting boundary form and position. Solution of the direct kinematic problem for the first layer with a curvilinear boundary makes it possible to calculate the migration aperture values close to the size of the first Fresnel zone. Using the optimal migration aperture, one can obtain a qualitative image of the first boundary and correctly determine the velocities in the first layer.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201800327
2018-04-09
2024-03-28
Loading full text...

Full text loading...

References

  1. ЗавалишинБ.Р.
    Волновой подход к построению сейсмических изображений.- Геофизика, № 4. ЕАГО, 1994. с.29–32
    [Google Scholar]
  2. Измерение и использование радиуса первой зоны Френеля в сейсморазведке. Геофизика5, 2008 с.3–7
    [Google Scholar]
  3. КозловЕ.А.
    Миграционные преобразования в сейсморазведке. М.: Недра, 1986.
    [Google Scholar]
  4. ПузыревН.Н.
    Интерпретация данных сейсморазведки методом отраженных волн. – М.: Гостоптехиздат.-1959.
    [Google Scholar]
  5. Bancroft, J.C.
    A practical understanding of pre- and poststack migration. (Course Notes Series No 14. SEG2007.
    [Google Scholar]
  6. Bancroft, J.C., Geiger, H.D. Foltinek, D., Wang, S.
    , 1995. Prestack migration by equivalent offsets and common scatterpoint (CSP) gathers. Exp. Abs.EAGE, P124
    [Google Scholar]
  7. Reshef, M.
    , 1997, The use of 3-D prestack depth imaging to estimate layer velocities and reflector positions: Geophysics, 62, 206–210
    [Google Scholar]
  8. ZavalishinB.R.
    1994. Wave approach for seismic imaging. Geophizica, EAGO, 4 p.29–32
    [Google Scholar]
  9. 2008, First Fresnel zone radius evaluation and application in seismic Geophizica, EAGO, 5 p.3–7
    [Google Scholar]
  10. KozlovE.A.
    Migration transforms for seismic survey. M.: Nedra, 1986
    [Google Scholar]
  11. PuzyrevN.N.
    Seismic data interpretation for reflection waves. M.: Gostoptexizdat, 1959
    [Google Scholar]
  12. Bancroft, J.C.
    A practical understanding of pre- and poststack migration. (Course Notes Series No 14. SEG2007.
    [Google Scholar]
  13. Bancroft, J.C., Geiger, H.D. Foltinek, D., Wang, S.
    , 1995. Prestack migration by equivalent offsets and common scatterpoint (CSP) gathers. Exp. Abs.EAGE, P124
    [Google Scholar]
  14. Reshef, M.
    , 1997, The use of 3-D prestack depth imaging to estimate layer velocities and reflector positions: Geophysics, 62, 206–210
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201800327
Loading
/content/papers/10.3997/2214-4609.201800327
Loading

Data & Media loading...

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