Variation in the Permeability of Intact and Fractured Rocks due to Transient Disturbances in Axial Stress or Pore Pressure

Table 1

Experimental conditions and effect of stress disturbances on permeability.

Experiments	Frequency (Hz)	Peak amplitude	Disturbances	Samples		Permeability response
Elkhoury et al. [9]	0.05	0.02–0.3 MPa	Pore pressure	Fractured in situ	Berea sandstone	Increase
Roberts [10]	25–75	0.3–1.2 MPa	Axial stress	Intact	Berea sandstone	Increase
Shmonov et al. [11]	0.05–20	Strains 10^−4–10^−3	Axial stress	Intact	Limestone basalts gabbro	Increase (high T = 130°C–250°C); Decrease (low T = 20°C)
Liu & Manga [12]	0.3–2.5	Strain 10^−4	Axial displacement	Fractured	Sandstone	Decrease