Fracability Evaluation Method and Influencing Factors of the Tight Sandstone Reservoir

Table 1

Results of triaxial compression tests and sonic tests.

Core number	Confining pressure/MPa	Peak strength/MPa	Static Poisson’s ratio	Static elastic modulus/GPa	P-wave velocity/m·s^-1	S-wave velocity/m·s^-1
1	0	54.6	0.258	8.26	3632	1994
2	10	106.9	0.256	11.74	3735	2052
3	10	140.8	0.219	16.28	4122	2400
4	20	136.0	0.185	15.26	3965	2442
5	20	142.9	0.174	14.48	3919	2427
6	30	164.9	0.168	18.90	4180	2630
7	30	172.4	0.188	17.84	4025	2447
8	40	173.4	0.203	16.72	4155	2470
9	40	179.8	0.205	17.33	4054	2428
10	50	194.6	0.217	18.80	4283	2521
11	50	186.3	0.216	17.84	4232	2503
12	60	206.4	0.188	19.84	4225	2547
13	60	210.5	0.198	19.53	4203	2524
14	70	237.3	0.197	22.16	4293	2604
15	70	242.4	0.202	23.53	4322	2634