Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity

Table 3

Rock strength attenuation coefficients of Jurassic sandstones.

Temperature (°C)	Confining pressure (MPa)
25	0	20.4	20.4	1.000	0.426
	4	6.9	24.1	0.286
	6	6.65	27.15	0.245
	8	5.15	30.15	0.171
−5	0	31.96	31.96	1.000	0.500
	4	16.65	38.76	0.430
	6	15.34	41.92	0.366
	8	9.12	44.27	0.206
−10	0	39.7	39.7	1.000	0.548
	4	20.78	44.1	0.471
	6	20.38	48.5	0.420
	8	16	53.5	0.299
−15	0	41	41	1.000	0.561
	4	23.4	48.1	0.486
	6	22.42	52.62	0.426
	8	19.08	57.28	0.333