1887
ASEG2013 - 23rd Geophysical Conference
  • ISSN: 2202-0586
  • E-ISSN:

Abstract

This paper presents an extension of our previous effort on multiple attenuation in shallow water. While our previous workflow, termed as Shallow Water Demultiple (SWD), is robust in suppressing water-layer related multiples (WLRMs) with shallow seafloor, it faces difficulties when the seafloor is too shallow and complex because of the near offset gap related to acquisition. The wavelet stretch resulted from near offset extrapolation causes spectral distortion in multiple model from SWD which leads to sub-optimized subtraction result in shallow part of the data. Our new method is a hybrid approach in which shallow WLRMs are handled by using the Green’s function of the seafloor primary reflections, while the rest of the multiples are handled by SWD. The Green’s function in this case is derived from auto-picking the travel time of the multichannel prediction operator estimated from SWD. We show the application of the method for attenuating shallow water multiples on field data examples from offshore Australia.

© 2013 ASEG
Loading

Article metrics loading...

/content/journals/10.1071/ASEG2013ab249
2013-12-01
2026-01-24

  • From This Site

    /content/journals/10.1071/ASEG2013ab249
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Alai, R., Verschuur, D.J., Drummond, J., Morris, S. and Haughey, G. 2002. Shallow water multiple prediction and attenuation, case study on data from the Arabian Gulf, SEG Expanded Abstracts 21, 2229.
  2. Berkhout, A. J. and Wapenaar, C.P.A. 1989. One-way version of the Kirchhoff integral, Geophysics, 54(4), 460-467.
  3. Berkhout, A. J. and Verschuur, D. J., 2005. Removal of internal multiples with the common-focus-point (CFP) approach: Explanation of the theory: Geophysics, 70, V45.
  4. Biersteker J., 2001. MAGIC: Shell’s surface multiple attenuation technique: 71st Meeting, SEG, Expanded Abstracts, 1301-1304.
  5. Gardner, G.H.F., Gardner L.W. and Gregory A.R. 1974. Formation velocity and density - the diagnostic basics for stratigraphic traps. Geophysics, 39, 770-780.
  6. G. J. A. van Groenestijn and D. J. Verschuur, 2009. Estimating primaries by sparse inversion and application to near-offset data reconstruction, Geophysics, 74, A23.
  7. Hargreaves N., 2006, Surface multiple attenuation in shallow water and the construction of primaries from multiples: 76th Meeting, SEG, Expanded Abstracts, 2689-2693.
  8. Hung, B., Yang, K.L., Zhou, J., Guo, Y.H. and Xia, Q.L., 2010a. Surface multiple attenuation in seabeach-shallow water, case study on data from the Bohai Sea technique: 80th Meeting, SEG, Expanded Abstracts, 3431-3435.
  9. Hung, B., Yang, K.L., Zhou, J. and Xia, Q.L., 2010b. Shallow Water Demultiple, ASEG, Expanded Abstracts, 1-4.
  10. Pica A., Poulain G., David B., Magesan M., Baldock S., Weisser T., Hugonnet P. and Herrmann P., 2005, 3D surface- related multiple modeling, principles and results: 75th Meeting, SEG, Expanded Abstracts, 2080-2083.
  11. Wang, P., Jin, H.Z., Xu, S. and Zhang, Y., 2011. Model-based water-layer demultiple, SEG Expanded Abstracts 30, 3551.
  12. Wong, J., Han, L.J., Bancroft, J.C. and Stewart, R.R. 2009. Automatic time-picking of first arrivals on noisy microseismic data, CSEG Abstracts.
/content/journals/10.1071/ASEG2013ab249
Loading
  • Article Type: Research Article

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