1887

Abstract

Summary

The major trends in the relation between seismic anisotropy and compaction/diagenesis in shaly formations have been recently analyzed from two databases. Unfortunately many of the data of one of the databases correspond to other lithologies than shales, even in a broad sense, which tends to weaken the reached conclusions. In the present study we re-iterate the analysis on two carefully selected and actualized large databases (typically more than 800 samples). Our results confirm that burial/compaction can be excluded as a major cause of seismic anisotropy in shaly formations. Also clay platelet alignment can explain most of the anisotropy measurements of both databases. As a consequence, burial and/or compaction has generally no first order effect on clay platelet alignment.

We suggest that the condition of deposition of the sediments is the major factor for the alignment of the clay platelets. At last, we propose simple plots for straightforwardly quantifying the Orientation Distribution Function coefficients W_200 and W_400 of the clay platelet alignment from the measurement of seismic anisotropy parameters.

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/content/papers/10.3997/2214-4609.201413227
2015-06-01
2019-12-11
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References

  1. Pervukhina, M., Rasolofosaon, P.
    [2014] Elastic anisotropy of shales… revisited. 16th Int. Workshop on Seismic Anisotropy, Natal (Brazil), Nov. 16–21, 2014.
    [Google Scholar]
  2. Thomsen, L.
    [1986] Weak elastic anisotropy. Geophysics, 51, 1954–1966.
    [Google Scholar]
  3. Pervukhina, M., Golodoniuc, P. and Dewhurst, D.N.
    [2013] Phenomenologic study of seismic anisotropy in shales. 75th EAGE Conference & Exhibition incorporating SPE EUROPEC 2013, London, UK, paper We-P15-05.
    [Google Scholar]
  4. Horne, S.
    [2012] Database on seismic anisotropy. Excerpt from www.rockphysicists.org/data
    [Google Scholar]
  5. Nafe, J.E. and Drake, C.L.
    [1960] Physical properties of marine sediments. In: The Sea, Hill, M.N. (Ed.)Interscience, Vol. 3. New-York, 794–815.
    [Google Scholar]
  6. Gardner, G.H.F., Gardner, L.W. and Gregory, A.R.
    [1974] Geophysics, 39, 770–780.
    [Google Scholar]
  7. Bourbié, T., Coussy, O. and Zinszner, B.
    [1987] Acoustics of Porous Media. Editions Technip.
    [Google Scholar]
  8. Alkhalifah, T. and Tsvankin, I.
    [1995] Geophysics, 60, 1550–1566.
    [Google Scholar]
  9. Hornby, B.E.
    [1995] The elastic properties of shales. PhD dissertation, Univ. of Cambridge.
    [Google Scholar]
  10. Pervukhina, M., Siggins, A.F., Dewhurst, D.N. and Gurevich, B.
    [2007] Elastic properties of shales with respect to silt fraction. ASEG, Perth, Australia.
    [Google Scholar]
  11. Tiwary, D.K.
    [2007] Mathematical Modeling and Ultrasonic Measurement of Shale Anisotropy Comparison of Upscaling Methods from Sonic to Seismic. PhD dissertation, Univ. Oklahoma.
    [Google Scholar]
  12. Sayers, C.M.
    [2005] Seismic anisotropy of shales. Geophysical Prospecting, 53, 667–676.
    [Google Scholar]
  13. ZinsznerB., et al.
    [2002] Oil & Gas Science and Technology – Rev. IFP, 57(4), 341–353.
    [Google Scholar]
  14. Dong, X., Y.-H. W.
    [2008] Soil Science Society of America Journal, 72(6), 1532–1541.
    [Google Scholar]
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