Critical porosity; the key to relating physical properties to porosity in rocks

@article{Nur1995CriticalPT,
  title={Critical porosity; the key to relating physical properties to porosity in rocks},
  author={A. Nur and G. Mavko and J. Dvorkin and Doron Gal},
  journal={Seg Technical Program Expanded Abstracts},
  year={1995},
  volume={65},
  pages={878-881}
}
Many classes of rock such as sandstones, dolomites, chalks, and cracked igneous rocks have each a distinct characteristic porosity above which the material behaves as s suspension. The porosity at which this system changes, or transforms from isostress to solid load-bearing is defined here as the critical porosity {phi}{sub c}. It is easy to envision that at {phi}{sub c} not only the mechanical moduli, but also other properties such as strength and electrical conductivity, may also undergo… Expand
The stress sensitivity of shaley sandstones
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