Mechanical-Chemical-Mineralogical Controls on Permeability Evolution of Shale Fractures

Table 4

Predicted Marcellus shale aperture evolution.

Fluid pH	Fitting equation	Fitted	Coefficient of determination
4.0		−2.328	0.906
5.0		−2.541	0.916
6.0		−3.001	0.892
7.0		−3.145	0.945