Under high temperature, a series of physical and chemical changes occur in the rock and they have an important influence on rock permeability
. Following a high temperature treatment, the changes in the pores and the cracks in the rock are related to the thermal expansion and structural changes in the rock (Xu et al., 2008 and Qian et al., 2015).
In order to conduct the thermal cracking and permeability of granite under high temperature and triaxial compression, the solid-head triaxial rock permeability
test system self-designed by Taiyuan University of Technology, China, is adopted (Figures 1 and 2).
 measured the mudstone permeability, showing a high stress sensitivity during loading of effective confining pressure, and Zhang  discussed the stress-strain permeability behavior of the claystone during damage process, both indicating that mud or clay components will greatly influence the rock permeability
, which is useful to understand the permeability of the reservoir sandstone with mud.
Seright and Martin explained the effects of pH, rock permeability
, and lithology on the performance of a resorcinol/formaldehyde gel .
The temporary plugging rate is the ratio of the permeability after shielding ring formation to the original rock permeability
in units of %.
Based on the similarity criterion of [[pi].sub.1], [[pi].sub.2], and [[pi].sub.3] as described above, we have designed and selected the size of the experimental model, the rock permeability
, the injection rate, and the viscosity of crude oil.
Experimental Study on Effects of clay in the reservoir rock permeability
reduction in water injection process in hydrocarbon reservoirs, Enhanced oil recovery Iranian Chemical Engineering Journal (special issue) (no 43).
As is shown in Figure 8, curves of rock permeability
versus pore pressure at the condition of [p.sub.c] - [p.sub.p] = 3 MPa are plotted.
In general, increase in rock permeability
is favor to build a favorable processed zone with high L1/L2 ratio.
This instrumentation is designed to measure stress, water pressure, and rock permeability
Traditionally, engineers determined rock permeability
and porosity with a procedure that measures how much water is injected and how much oil gets out under specific conditions of temperature and pressure.
Any of several factors could cause such drops, he says -- such as stress changes that interrupt a constant flow of helium by decreasing rock permeability