Table 1 Basic information of the tested sandstones
Sample | Age of stratum | Physical properties | |||||
|---|---|---|---|---|---|---|---|
Color | Apparent density (kg/m3) | Open porosity (%) | Free water absorption (mass, %) | Forced water absorption (mass, %) | P-wave velocity (km/s) | ||
YG | J2y | Sandy brown | 2436 (± 219) | 9.64 (± 0.73) | 3.16 (± 0.15) | 3.95 (± 0.19) | 2.88 (± 0.23) |
DZ | J3p | Beige, grayish | 2380 (± 202) | 7.69 (± 0.62) | 2.31 (± 0.08) | 3.23 (± 0.12) | 2.82 (± 0.24) |
LS | K2j | Brownish red | 2328 (± 256) | 13.02 (± 1.43) | 3.34 (± 0.23) | 5.59 (± 0.29) | 2.55 (± 0.28) |