Experimental Study on the Effect of Supercritical CO₂ on Mechanical Properties and Fracture Characteristics of Longmaxi Shale

Table 3

The mechanical anisotropy of the three tests.

NO	Test name	Rc (S) [a]	Rc (E) [b]	Rc (μ) [c]
1	scCO2 test	1.06	1.05	1.11
2	N2 test	1.28	1.20	0.93
3	He test	1.22	0.97	0.95

[a] Anisotropic index of triaxial compression strength. [b] anisotropic index of elastic modulus. [c] anisotropic index of Poisson’s ratio.