On the Poroelastic Biot Coefficient for a Granitic Rock

The Biot coefficient is a parameter that encountered in the theory of classical poroelasticity, dealing with mechanics fluid-saturated porous medium elastic grains and an skeletal structure. In particular, plays important role partitioning externally applied stresses between pore fluid skeleton. conventional approach for estimating relies on mechanical testing poroelastic solid, both completely dry fully saturated state. former type tests to determine compressibility rock can be performed quite conveniently. latter tests, which solid material constituting skeleton, involve rock. These are challenging when has low permeability, since any unsaturated regions influence interpretation phase composing An alternative estimation grain considers application multi-phasic theories elasticity composite materials, estimate compressibility. This requires accurate determination mineralogical composition using XRD, characteristics minerals by appealing published literature. procedure used Lac du Bonnet granite obtained from western region Canadian Shield.