1887
Volume 54, Issue 6
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

We describe an integrated method for solving the complex near‐surface problem in land seismic imaging. This solution is based on an imaging approach and is obtained without deriving a complex near‐surface velocity model. We start by obtaining from the data the kinematics of the one‐way focusing operators (i.e. time‐reversed Green's functions) that describe propagation between the acquisition surface and a chosen datum reflector using the common‐focus‐point technology. The conventional statics solutions obtained from prior information about the near surface are integrated in the initial estimates of the focusing operators. The focusing operators are updated iteratively until the imaging principle of equal traveltime is fulfilled for each subsurface gridpoint of the datum reflector. Therefore, the seismic data is left intact without any application of time shifts, which makes this method an uncommitted statics solution. The focusing operators can be used directly for wave‐equation redatuming to the respective reflector or for prestack imaging if determined for multiple reflecting boundaries. The underlying velocity model is determined by tomographic inversion of the focusing operators while also integrating any hard prior information (e.g. well information). This velocity model can be used to perform prestack depth imaging or to calculate the depth of the new datum level. We demonstrate this approach on 2D seismic data acquired in Saudi Arabia in an area characterized by rugged topography and complex near‐surface geology.

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2006-11-02
2024-03-28
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References

  1. Al‐AliM., Hastings‐JamesR., MakkawiM. and KorvinG.2003. Vibrator attributes leading velocity estimation. The Leading Edge22, 400–405.
    [Google Scholar]
  2. BagainiC. and AlkhalifahT.2003. One step better than static corrections: the topographic datuming operator. 65th EAGE Conference, Stavanger , Norway , Extended Abstracts, C‐07.
  3. BeasleyC. and LynnW.1992. The zero‐velocity layer: Migration from irregular surfaces. Geophysics57, 1435–1443.
    [Google Scholar]
  4. BerkhoutA.J.1980. Seismic Migration, Imaging of Acoustic Energy by Wave Field Extrapolation, A. Theoretical Aspects . Elsevier. Science Publishing Co.
    [Google Scholar]
  5. BerkhoutA.J.1997. Pushing the limits for seismic imaging, parts I and part II. Geophysics62, 937–969.
    [Google Scholar]
  6. BerryhillJ.R.1979. Wave‐equation datuming. Geophysics44, 1329–1344.
    [Google Scholar]
  7. BerryhillJ.R.1984. Wave‐equation datuming before stack. Geophysics49, 2064–2066.
    [Google Scholar]
  8. BevcD.1997. Flooding the topography: Wave‐equation datuming of land data with rugged acquisition topography. Geophysics62, 1558–1569.
    [Google Scholar]
  9. BolteJ.F.B., VerschuurD.J. and HeggeR.F.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.
  10. ClaerboutJ.F.1976. Fundamentals of Geophysical Data Processing . McGraw–Hill Book Co.
    [Google Scholar]
  11. CoxM.1999. Static Corrections for Seismic Reflection Surveys . Society Exploration Geophysicists.
    [Google Scholar]
  12. CoxB.E.2004. Tomographic inversion of focusing operators . PhD Thesis, Delft University of Technology .
    [Google Scholar]
  13. CoxB.E. and VerschuurD.J.2001. Data‐driven tomographic inversion of focusing operators. 71st SEG Meeting, San Antonio , Texas , USA , Expanded Abstracts, 722–725.
  14. GurevichB., KeydarS. and LandaE.2002. Multifocusing imaging over an irregular topography. Geophysics67, 639–643.
    [Google Scholar]
  15. HeilmannZ., MannJ. and KoglinI.2006. CRS‐stack‐based seismic imaging considering top‐surface topography. Geophysical Prospecting54.
    [Google Scholar]
  16. HindriksC.O.H. and DuijndamA.J.W.1999. Handling near surface effects in imaging by using the common focal point technology. 69th SEG Meeting, Houston , USA , Expanded Abstracts, 575–578.
  17. HindriksC.O.H. and VerschuurD.J.2001. Common Focus Point approach to the complex near surface. 71st SEG Meeting, San Antonio , Texas , USA , Expanded Abstracts, 1863–1866.
  18. KelamisP.G., EricksonK.E., VerschuurD.J. and BerkhoutA.J.2002. Velocity independent redatuming: a new approach to the near‐surface problem in land seismic data processing. The Leading Edge21, 730–735.
    [Google Scholar]
  19. KoglinI., MannJ. and HeilmannZ.2006. CRS‐stack‐based residual static correction. Geophysical Prospecting54,.
    [Google Scholar]
  20. ReshefM.1991. Depth migration from irregular surfaces with depth extrapolation methods. Geophysics56, 119–122.
    [Google Scholar]
  21. Salinas‐GarnicaT. and LarnerK.1997. Comparison of datuming alternatives in areas of rough terrain. 67th SEG Meeting, Dallas , USA , Expanded Abstracts, 1274–1277.
  22. ShtivelmanV. and CanningA.1988. Datum correction by wave‐equation extrapolation. Geophysics53, 1311–1322.
    [Google Scholar]
  23. TanerM.T., WagnerD.E., BaysalE. and LuL.1998. A unified method for 2‐D and 3‐D refraction statics. Geophysics63, 260–274.
    [Google Scholar]
  24. WigginsJ.W.1984. Kirchhoff integral extrapolation and migration of nonplanar data. Geophysics49, 1239–1248.
    [Google Scholar]
  25. YangK., WangH. and MaZ.1999. Wave equation datuming from irregular surfaces using finite difference scheme. 69th SEG Meeting, Houston , USA , Expanded Abstracts, 1465–1468.
  26. YilmazO. and LucasD.1986. Prestack layer replacement. Geophysics51, 1355–1369.
    [Google Scholar]
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