On the Fluid Dependence of Seismic Anisotropy: Beyond Biot-Gassmann

Abstract

This work addresses the question of the fluid dependence of the non-dimensional parameters of seismic anisotropy. It extends the classic theory of the fluid-dependence of elasticity, and applies the approximation of weak seismic anisotropy. The analysis shows that reliance upon the classic theory leads to oversimplified conclusions. Extending the classic theory introduces new parameters (which must be experimentally determined) into the conclusions, making their application in the field context highly problematic.

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Acknowledgments

I appreciate many tough discussions with J. Berryman (LBNL), and B. Gurevich (Curtin), and a tough review by I. Tsvankin (CSM) of a different manuscript. The final publication is available at Springer via https://doi.org/10.1007/s12583-017-0806-9.

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Correspondence to Leon Thomsen.

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Thomsen, L. On the Fluid Dependence of Seismic Anisotropy: Beyond Biot-Gassmann. J. Earth Sci. 29, 1335–1339 (2018). https://doi.org/10.1007/s12583-017-0806-9

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Key words

  • Biot
  • Gassmann
  • incompressibility
  • fluids
  • fluid substitution
  • pore compressibility