Research Article

The Applicability of Different Fluid Media to Measure Effective Stress Coefficient for Rock Permeability

Table 3

Results of ESCK measured by three different fluid media.

SampleFluid mediaPore pressureRangeAverage value

HH50-06NitrogenUnload(0.65, 1.04)0.78 ± 0.11
Load(0.16, 1.18)0.54 ± 0.30
Distilled waterUnload(1.13, 7.01)2.80 ± 1.69
Load(1.31, 6.25)3.25 ± 1.39
BrineUnload(1.30, 2.06)1.61 ± 0.24
Load(0.53, 3.30)1.63 ± 0.79