Study on Fracture Morphological Characteristics of Refracturing for Longmaxi Shale Formation

Table 2

The summary of refracturing test parameters.

Sample number	Three-dimensional in situ stress. (MPa)				Flow rate (mL/s)	Initial fracturing breakdown pressure (MPa)	Refracturing breakdown pressure (MPa)
	H-0-2	19.3	21.0					16.3	0.29	0.5	31.09	/
H-0-7	19.3	21.0	16.3	0.29	0.5	32.01	/
H-0-15	19.3	21.0	16.3	0.29	0.5	31.74	/
H-0-19	19.3	21.0	16.3	0.29	0.5	37.35	/
H-0-4	19.3	21.0	16.3	0.29	0.5	30.90	27.93
H-0-6	19.3	21.0	16.3	0.29	0.5	29.49	38.65
H-0-10	19.3	21.0	16.3	0.29	0.5	29.77	35.29