Research Article
Mechanism of Enhanced Oil Recovery for In-Depth Profile Control and Cyclic Waterflooding in Fractured Low-Permeability Reservoirs
Table 2
Different displacement schemes under different enhanced oil recovery methods.
| | Schemes | Core no. | Polymer molecular weight (×104) | Polymer concentration (mg/L) | Injection velocity (mL/min) | Time for in-depth profile control or cyclic waterflooding (water cut, %) | Amount of profile control agent (PV) | Injection cycle (h) |
| | Waterflooding | #5-1 | — | — | 0.3 | — | — | — | | In-depth profile control | #5-2 | 1600 | 1000 | 0.3 | 80% | 0.15 | — | | Cyclic waterflooding | #5-3 | — | — | 0.3 | 80% | — | 4 | | In-depth profile control and cyclic waterflooding | #5-4 | 1600 | 1000 | 0.3 | 80% | 0.15 | 4 |
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