Experimental scheme |
Recovery efficiency (%) |
The added value of recovery efficiency (%) |
Early water flooding |
Subsequent water flooding |
Compared with Early water flooding |
Water flooding 90%+0.1PV Cr3+/APP5 plugging agent+ Water flooding 98% |
43.5 |
56.1 |
12.6 |
Water flooding 90%+0.2PV Cr3+/APP5 plugging agent+ Water flooding 98% |
44.6 |
58.4 |
13.8 |
Water flooding 90%+0.3PV Cr3+/APP5 plugging agent+ Water flooding 98% |
44 |
60.9 |
16.9 |
Water flooding 90%+0.4PV Cr3+/APP5 plugging agent+ Water flooding 98% |
43.6 |
61.2 |
17.6 |