1887
Volume 49 Number 6
  • E-ISSN: 1365-2478

Abstract

We provide a data‐driven macro‐model‐independent stacking technique that migrates 2D prestack multicoverage data into a common‐offset (CO) section. We call this new process the CO common‐reflection‐surface (CRS) stack. It can be viewed as the generalization of the zero‐offset (ZO) CRS stack, by which 2D multicoverage data are stacked into a well‐simulated ZO section. The CO CRS stack formula can be tailored to stack P‐P, S‐S reflections as well as P‐S or S‐P converted reflections. We point out some potential applications of the five kinematic data‐derived attributes obtained by the CO CRS stack for each stack value. These include (i) the determination of the geometrical spreading factor for reflections, which plays an important role in the construction of the true‐amplitude CO section, and (ii) the separation of the diffractions from reflection events. As a by‐product of formulating the CO CRS stack formula, we have also derived a formula to perform a data‐driven prestack time migration.

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2008-07-07
2024-03-29
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References

  1. De BazelaireE.1988. Normal moveout revisited – inhomogeneous media and curved interfaces. Geophysics53, 143–157.
    [Google Scholar]
  2. BilletteF. & LambaréG.1998. Velocity macromodel estimation from seismic reflection data by stereotomography. Geophysical Journal International135, 671–690.
    [Google Scholar]
  3. BortfeldR.1989. Geometrical ray theory: rays and traveltimes in seismic systems (second‐order approximations of the traveltime). Geophysics48, 342–349.
    [Google Scholar]
  4. ČervenýV.2001. Seismic Ray Theory. Cambridge University Press.
    [Google Scholar]
  5. GelchinskyB., BerkovitchA., KeydarS.1999. Multifocusing homeomorphic imaging. Part 1: Basic concepts and formulas. Journal of Applied Geophysics42, 229–242.DOI: 10.1016/s0926-9851(99)00038-5
    [Google Scholar]
  6. HagedoornJ.1954. A process of seismic reflection interpretation. Geophysical Prospecting2, 85–127.
    [Google Scholar]
  7. HubralP.1983. Computing true amplitude reflections in a laterally inhomogeneous earth. Geophysics48, 1051–1062.
    [Google Scholar]
  8. HubralP., SchleicherJ., TygelM.1992a. Three‐dimensional paraxial ray properties. Part I: Basic relations. Journal of Seismic Exploration1, 265–279.
    [Google Scholar]
  9. HubralP., SchleicherJ., TygelM.1992b. Three‐dimensional paraxial ray properties. Part II: Applications. Journal of Seismic Exploration1, 347–362.
    [Google Scholar]
  10. JägerR., MannJ., HöchtG., HubralP.2001. Common‐reflection‐surface stack: image and attributes. Geophysics66, 97–109.
    [Google Scholar]
  11. MannJ., HubralP., TraubB., GerstA., MeyerH.2000. Macro‐model independent approximative prestack time migration. 62nd EAGE conference, Glasgow, Scotland, Extended Abstracts, B‐52.
  12. MannJ., JägerR., MüllerT., HöchtG., HubralP.1999. Common‐reflection‐surface stack – a real data example. Journal of Applied Geophysics42, 301–318.
    [Google Scholar]
  13. SwordC.1986. Tomographic determination of interval velocities from picked reflection seismic data. 56th SEG meeting, Houston, USA, Expanded Abstracts, 657–660.
  14. TanerM.T. & KoehlerF.1969. Velocity spectra – digital computer derivation and applications of velocity functions. Geophysics34, 859–881.
    [Google Scholar]
  15. ThoreP.D., De BazelaireE., RayM.P.1994. Three‐parameter equation: an efficient tool to enhance the stack. Geophysics59, 297–308.
    [Google Scholar]
  16. UrsinB.1982. Quadratic wavefront and traveltime media with curved interfaces. Geophysics47, 1012–1021.
    [Google Scholar]
  17. ZhangY., BerglerS., TygelM., HubralP.2001.Model‐independent traveltime attributes for 2D and finite‐offset multicoverage reflections. PAGEOPH, in press.
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