1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 78th EAGE Conference and Exhibition 2016
  5. Conference paper

Abstract

Summary

Surface-wave inversion (SWI) for S-wave velocity plays an important role in near surface characterization and PS-wave velocity model building for depth migration. The inversion requires dispersion curves picked from the spectrum of surface waves. Robust f-k spectral analysis is achieved by superposition of surface-wave spectra, with a careful balance struck between larger transform apertures that provide higher spectral resolution, and smaller apertures that provide higher spatial resolution. A hybrid cost function is used in the inversion to reduce non-linearity for a multi-modal inversion without a-priori identification of higher order modes. This method is applied to a North Sea ocean bottom node (OBN) survey to produce a shallow Vs model that penetrates 120 m depth below the seabed. It has similar spatial resolution to the Vp model from Full Waveform Inversion while highlighting shallow structures that are not visible in the Vp model. The Vp/Vs ratio from these inversions provides a powerful tool for near-surface characterization. Furthermore, the high-resolution shallow Vs model from SWI complements the use of PS-wave tomography in illuminating the near surface, and is shown to improve the PS image at both shallow and deep targets.

© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201601364
2016-05-30
2024-04-19

  • From This Site

    /content/papers/10.3997/2214-4609.201601364
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Boiero, D., Wiarda, E., and Vermeer, P.
    [2013] Surface-and guided-wave inversion for near-surface modeling in land and shallow marine seismic data. The Leading Edge, 32(6), 638–646.
     [Google Scholar]
  2. Gabriels, P., Snieder, R. and Nolet, G.
    [1987] In situ measurements of shearwave velocity in sediments with higher-mode Rayleigh waves: Geophysical Prospecting, 35, 187–196.
     [Google Scholar]
  3. Maraschini, M., Ernst, F., Foti, S. and Socco, L.V.
    [2010] A new misfit function for multimodal inversion of surface waves. Geophysics, 75(4), G31–G43.
     [Google Scholar]
  4. Neducza, B.
    [2007] Stacking of surface waves. Geophysics, 72(2), V51–V58.
     [Google Scholar]
  5. Socco, L.V., Foti, S. and Boiero, D.
    [2010] Surface wave analysis for building near surface velocity models: established approaches and new perspectives. Geophysics, 75(5), 75A83–102.
     [Google Scholar]
  6. Socco, L.V. and Strobbia, C.
    [2004] Surface wave methods for near-surface characterisation: A tutorial. Near Surface Geophysics, 2(4), 165–185.
     [Google Scholar]
  7. Warner, M. et al.
    [2013] Anisotropic 3D full-wave form inversion. Geophysics, 78(2), R59–R80.
     [Google Scholar]
  8. Xia, J., Miller, R. and Park, C.
    [1999] Estimation of near-surface shear-wave velocity by inversion of Rayleigh waves. Geophysics, 64(3), 691–700.
     [Google Scholar]
  9. Zheng, D. and Miao, X.
    [2014] Multimodal Rayleigh wave dispersion curve picking and inversion to build near surface shear wave velocity models. 76th EAGE Conference & Exhibition, Amsterdam.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601364
Loading
Multi-modal Surface Wave Inversion and Application to North Sea OBN Data
Conference Proceedings 2016, 1 (2016); https://doi.org/10.3997/2214-4609.201601364
/content/papers/10.3997/2214-4609.201601364
/content/papers/10.3997/2214-4609.201601364
Loading

Data & Media loading...

Most Cited This Month Most Cited RSS feed

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