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DOUBLE-POROSITY GEOMECHANICS

**Figure 1:** The elements of a double-porosity 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⁾.
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In this section, we present the fundamental governing equations controlling the low-frequency (inertial effects being neglected) response of a double-porosity geomechanical system. See Berryman and Wang (1995) for details left out of the following brief summary.

Macroscopic Governing Equations
Constraints on the a_ij coming from the long-time limit

Next: Macroscopic Governing Equations Up: Berryman: Double-porosity analysis Previous: SINGLE-POROSITY GEOMECHANICS

Stanford Exploration Project
6/8/2002