1887
Volume 58 Number 6
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

Seismic interferometry is a relatively new technique to estimate the Green's function between receivers. Spurious energy, not part of the true Green's function, is produced because assumptions are commonly violated when applying seismic interferometry to field data. Instead of attempting to suppress all spurious energy, we show how spurious energy associated with refractions contains information about the subsurface in field data collected at the Boise Hydrogeophysical Research Site. By forming a virtual shot record we suppress uncorrelated noise and produce a virtual refraction that intercepts zero offset at zero time. These two features make the virtual refraction easy to pick, providing an estimate of refractor velocity. To obtain the physical parameters of the layer above the refractor we analyse the cross‐correlation of wavefields recorded at two receivers for all sources. A stationary‐phase point associated with the correlation between the reflected wave and refracted wave from the interface identifies the critical offset. By combining information from the virtual shot record, the correlation gather and the real shot record we determine the seismic velocities of the unsaturated and saturated sands, as well as the variable relative depth to the water‐table. Finally, we discuss how this method can be extended to more complex geologic models.

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2010-05-04
2020-03-30
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References

  1. BakulinA. and CalvertR.2006. The virtual source method: Theory and case study. Geophysics71, SI139–SI150.
    [Google Scholar]
  2. BarrashW. and ClemoT.2002. Hierarchical geostatistics and multifacies systems: Boise Hydrogeophysical Research Site, Boise, Idaho. Water Resources Research38, 1196. doi:10.1029/2002WR001436
    [Google Scholar]
  3. BarrashW., ClemoT. and KnollM.D.1999. Boise Hydrogeophysical Research Site (BHRS): Objectives, design, initial geostatistical results. Proceedings of SAGEEP99, the Symposium on the Application of Geophysics to Engineering and Environmental Problems, 14–18 March, Oakland , California , USA , 389–398.
    [Google Scholar]
  4. BarrashW. and RebouletE.C.2004. Significance of porosity for stratigraphy and textural composition in subsurface coarse fluvial deposits, Boise Hydrogeophysical Research Site. Geological Society of America Bulletin116, 1059–1073. doi:10.1130/B25370.1
    [Google Scholar]
  5. ClementW.P., KnollM.D., LibertyL.M., DonaldsonP.R., MichaelsP., BarrashW. and PeltonJ.R.1999. Geophysical surveys across the Boise Hydrogeophysical Research Site to determine geophysical parameters of a shallow, alluvial aquifer. Proceedings of SAGEEP99, the Symposium on the Application of Geophysics to Engineering and Environmental Problems, 14–18 March, Oakland , California , USA , 399–408.
    [Google Scholar]
  6. DongS., ShengJ. and SchusterJ.T.2006. Theory and practice of refraction interferometry. 76th SEG meeting, New Orleans , Louisiana , USA , Expanded Abstracts, 3021.
  7. FerberR., VelascoL. and WestL.2009. Interferometric ray parameter estimation and applications. 4th North African/Mediterranean Petroleum & Geosciences Conference & Exhibition, Tunis , Tunisia , Expanded Abstracts, S32.
  8. HallidayD. and CurtisA.2008. Seismic interferometry, surface waves, and source distributions. Geophysical Journal International175, 1067–1087.
    [Google Scholar]
  9. KomatitschD. and TrompJ.2002. Spectral element simulations of global seismic wave propagation – I. Validation. Geophysical Journal International149, 390–412.
    [Google Scholar]
  10. KomatitschD. and VilotteJ.‐P.1998. The spectral‐element method: An efficient tool to simulate the seismic response of 2D and 3D geological structures. Bulletin of the Seismological Society of America88, 368–392.
    [Google Scholar]
  11. MikesellT.D., Van WijkK., CalvertA. and HaneyM.2009. The virtual refraction: Useful spurious energy in seismic interferometry. Geophysics74, A13.
    [Google Scholar]
  12. MoretG.H, ClementW.P., KnollM.D. and BarrashW.2004. VSP traveltime inversion: Near‐surface issues. Geophysics69, 345–351.
    [Google Scholar]
  13. ShapiroN.M. and CampilloM.2004. Emergence of broadband Rayleigh waves from correlations of the ambient seismic noise. Geophysical Research Letters31, L07614.
    [Google Scholar]
  14. SniederR.2004. Extracting the Green's function from the correlation of coda waves: A derivation based on stationary phase. Physical Review E69, 046610.
    [Google Scholar]
  15. SniederR., WapenaarK. and LarnerK.2006. Spurious multiples in seismic interferometry of primaries. Geophysics71, SI111–SI124.
    [Google Scholar]
  16. SniederR.K., Van WijkK., HaneyM.M. and CalvertR.2008. The cancellation of spurious arrivals in Green's function extraction and the generalized optical theorem. Physical Review E78, 036606.
    [Google Scholar]
  17. TatanovaM., BakulinA., MehtaK., KorneevV. and KashtanB.2008. Reconstructing head waves with virtual source method. 78th SEG meeting, Las Vegas , Nevada , USA , Expanded Abstracts, 183.
  18. WapenaarK. and FokkemaJ.2006. Green's function representation for seismic interferometry. Geophysics71, S133–S146.
    [Google Scholar]
  19. YilmazO.2001. Seismic Data Analysis . SEG. ISBN 1560800984.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): Interferometry , Near‐surface , Refraction , Seismics and Water‐table
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