The pore-scale examination of rock deformation and uid ow consisted of three separate tasks. (1) New laboratory measurements were made of poroelastic prop- erties of Berea sandstone and a new method was developed to measure both the poroelastic constants and the hydraulic conductivity on the same sample of rock in a single test. (2) The second task was to develop constitutive theories of elas- tic and poroelastic properties of dual-porosity rocks and rocks with cracks. The new constitutive relations explain wave-velocity dispersion in uid-saturatedening of shear modulus when dry rock is saturated. (3) The third task involved pore-scale percolation modeling of two-phase uid ow in granular media. The model properly simulates fractal geometries of nonwetting clusters and saturations for ow in unstable gradients. The perusion model to produce saturation maps in a rock core during evaporative drying. The realistic patchy saturation was used in a heuristic model for predicting elastic properties of partially-saturated rock, which mimicked laboratory results.
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