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Figure 1:
The elements of a doubleporosity model are: porous rock matrix
intersected by fractures. Three types of macroscopic pressure are pertinent
in such a model: external confining pressure p_{c}, internal pressure
of the matrix pore fluid p_{f}^{(1)}, and internal pressure of the fracture
pore fluid p_{f}^{(2)}.

In this section, we present the fundamental governing equations
controlling the lowfrequency (inertial effects being neglected) response
of a doubleporosity geomechanical system.
See Berryman and Wang (1995) for details left out of the
following brief summary.
Next: Macroscopic Governing Equations
Up: Berryman: Doubleporosity analysis
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Stanford Exploration Project
6/8/2002