Discrete Element Analysis for Hydraulic Fracture Propagations in Laminated Reservoirs with Complex Initial Joint Properties

Table 6

Percentage of each fracture type with different tensile-to-shear strength ratios.

Joint strength (tensile-to-shear strength ratio)	Approach angle	Sjs	Sjt	Pbs	Pbt
(0.75 : 1)	30°	0.253	0.022	0.231	0.493
	45°	0.337	0.014	0.243	0.405
	60°	0.439	0.018	0.189	0.353
	75°	0.399	0.009	0.256	0.336
	90°	0.159	0.000	0.322	0.519
(1 : 1)	30°	0.348	0.018	0.266	0.368
	45°	0.424	0.021	0.235	0.320
	60°	0.524	0.013	0.196	0.267
	75°	0.532	0.000	0.207	0.261
	90°	0.474	0.009	0.215	0.302
(1.25 : 1)	30°	0.475	0.012	0.201	0.312
	45°	0.520	0.016	0.182	0.283
	60°	0.584	0.008	0.185	0.223
	75°	0.547	0.000	0.197	0.256
	90°	0.576	0.007	0.185	0.233