number | A solution | B solution | permeability after plugging/μm2 | plugging rate/% |
1 | cationic polymer | cationic polymer | 0.49 | 80.52 |
2 | anionic polymer | anionic polymer | 2.23 | 10.59 |
3 | cationic polymer | anionic polymer | 0.19 | 92.15 |
4 | anionic polymer | cationic polymer | 0.25 | 89.92 |