Research Article
Main Controlling Factor of Polymer-Surfactant Flooding to Improve Recovery in Heterogeneous Reservoir
Table 4
Experiment data of oil displacement efficiency.
| Number | Polymer concentration | Surfactant concentration | Viscosity, mPa⋅s | IFT mN/m | Water flooding Recovery, % | chemical flooding Recovery, % | Incremental Recovery, % |
| (1) | 1500 | 0 | 39.67 | — | 39.98 | 49.21 | 9.23 | (2) | 0 | 0.3 | 0.67 | | 40.42 | 43.35 | 2.93 | (3) | 1500 | 0.3 | 40 | | 40.15 | 53.55 | 13.40 | (4) | 2000 | 0.3 | 51.64 | | 41.11 | 55.09 | 13.98 | (5) | 1500 | 0.2 | 39.47 | | 38.97 | 50.08 | 11.11 | (6) | 1500 | 0.4 | 38.79 | | 40.34 | 53.86 | 13.52 | (7) | 1500 | 0.3 | 28.97 | | 38.92 | 43.97 | 5.02 |
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