The Effect of Slickwater on Shale Properties and Main Influencing Factors in Hydraulic Fracturing

Table 5

Regression coefficients of factors influencing shale permeability.

Model	Non-normalized coefficient		Normalized coefficient
		Standard error	Beta	t	Significance
(Constant)	0.859	0.935	/	0.918	0.369
Shut-in time	-0.451	0.660	-0.148	-0.683	0.502
Backflow outlet pressure	0.017	0.075	0.047	0.220	0.828
Differential pressure during backflow	-0.049	0.250	-0.041	-0.195	0.847