[Retracted] Experimental Investigation on Hydraulic Fractures in the Layered Shale Formation

Table 1

Experimental design.

Sample	In situ stress (MPa)			Stress difference (MPa)	Flow rate (mL/min)	Viscosity (mPa∙s)
	1#	20	15				10	10	20	45
2#	16	15	10	6	20	45
3#	16	15	10	6	5	45
4#	16	15	10	6	20	2.5
5#	16	15	10	6	20	0.09
6#	20	15	10	10	20	0.09