Table 7 Porosity of red-bed soft rock in different water–rock interaction cycles.
From: Impact of water–rock interaction on the pore structures of red-bed soft rock
Sample no. | Images no. | Digital porosity. \(\mathrm{n}\) (%) | Average digital porosity, \(\stackrel{-}{\mathrm{n}}\) (%) | Test porosity, \({\mathrm{n}}^{\mathrm{^{\prime}}}\)(%) | Error, (%) |
|---|---|---|---|---|---|
R1 | a | 14.91 | 15.12 | 14.32 | 5.56 |
b | 15.37 | ||||
c | 15.07 | ||||
R2 | a | 16.97 | 16.62 | 15.79 | 5.26 |
b | 14.79 | ||||
c | 18.1 | ||||
R3 | a | 19.5 | 17.90 | 16.95 | 5.62 |
b | 18.65 | ||||
c | 15.56 | ||||
R5 | a | 16.81 | 18.53 | 17.81 | 4.06 |
b | 19.58 | ||||
c | 19.21 | ||||
R8 | a | 18.84 | 19.12 | 18.51 | 3.31 |
b | 18.77 | ||||
c | 19.76 | ||||
R12 | a | 17.52 | 19.14 | 18.82 | 1.72 |
b | 20.31 | ||||
c | 19.60 |
