1887
  1. Home
  2. A-Z Publications
  3. Geophysical Prospecting
  4. Volume 46, Issue 6
  5. Article
Volume 46 Number 6
  • E-ISSN: 1365-2478

Abstract

Tuning caused by closely spaced impedance boundaries affects seismic amplitudes. At zero‐offset the shape of the composite reflected signal approaches the time‐derivative of the original pulse as the layer thickness decreases. For layers thinner than half of the tuning thickness, the reflected amplitude is modified by a factor equal to twice the time‐thickness of the thin layer. Offset‐dependent tuning can be approximated by the time differences between primary reflections. For high‐velocity contrasts locally converted waves will also affect the total reflected seismic response. The contribution from intrabed multiples can, in most cases, be ignored. Correction for offset‐dependent tuning should be considered before conventional AVO analysis.

Loading

Article metrics loading...

/content/journals/10.1046/j.1365-2478.1998.00101.x
2002-02-27
2024-04-24

  • From This Site

    /content/journals/10.1046/j.1365-2478.1998.00101.x
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. BallV.1988. Thin bed tuning analysis using AVO stratigraphy methods. 58th SEG meeting, Anaheim, USA, Expanded Abstracts, 1213–1216.
  2. CastagnaJ.1993. AVO Analysis — Tutorial and Review. In: Offset‐Dependent Reflectivity — Theory and Practice of AVO Analysis (eds. J. P. Castagna and M. Backus), pp. 3–36. Society of Exploration Geophysicists.
  3. ČervenýV., MolotkovI.A., PšenšikI.1977. Ray Method in Seismology. Charles University Press.
  4. ChungH. & LawtonD.1995. Amplitude responses of thin beds: Sinusoidal approximation versus Ricker approximation. Geophysics60,223–230.
    [Google Scholar]
  5. HindletF. & McDonaldJ.1986. Thin layer analysis using offset/amplitude data. 56th SEG meeting, Houston, USA, Expanded Abstracts, 346–349.
  6. LinL. & PhairR.1993. AVO tuning. 63rd SEG meeting, Washington, DC, USA, Expanded Abstracts, 727–730.
  7. SimmonsJ. & BackusM.M.1994. AVO modeling and the locally converted shear wave. Geophysics59,1237–1248.
    [Google Scholar]
  8. SwanH.1988. Amplitude versus offset analysis in a finely layered media. 58th SEG meeting, Anaheim, USA, Expanded Abstracts, 1195–1198.
  9. UrsinB.1990. Offset‐dependent geometrical spreading in a layered medium. Geophysics55,492–496.
    [Google Scholar]
  10. UrsinB. & DahlT.1992. Seismic reflection amplitudes. Geophysical Prospecting40,483–512.
    [Google Scholar]
  11. UrsinB. & EkrenB.1995. Robust AVO analysis. Geophysics60,317–326.
    [Google Scholar]
  12. WidessM.1973. How thin is a thin bed?Geophysics38,1176–1180.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1046/j.1365-2478.1998.00101.x
Loading
Thin‐bed AVO effects[Link]
Geophysical Prospecting 46, 571 (1998); https://doi.org/10.1046/j.1365-2478.1998.00101.x
/content/journals/10.1046/j.1365-2478.1998.00101.x
/content/journals/10.1046/j.1365-2478.1998.00101.x
Loading

Data & Media 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