Summary
Stress produces framatic changes in fluid permeability of geologic materials. An increase of nearly threefold occurred in granite at high stress, an increase of 20 percent in sandstone, and a hundredfold decrease in compacted sand. Permeability of sand and sandstone did not follow the effective stress law. Flow along joints was very sensitive to effected stress changes, a fourfold change being caused by as little as 1.0 MPa.
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Brace, W.F. A note on permeability changes in geologic material due to stress. PAGEOPH 116, 627–633 (1978). https://doi.org/10.1007/BF00876529
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DOI: https://doi.org/10.1007/BF00876529