Research Article
Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir
Table 2
The porosity and permeability of sand packs used for flooding experiments.
| Test no. | Chemical slug | Sand packs | Permeability (μm2) | Porosity (%) |
| 1# | Polymer flooding (P) | High permeability | 3.64 | 42.1 | Low permeability | 0.91 | 35.6 |
| 2# | Polymer-viscosity reducing surfactant D1 flooding (P+D1) | High permeability | 3.97 | 41.4 | Low permeability | 1.18 | 36.5 |
| 3# | Polymer-viscosity reducing surfactant A1 flooding (P+A1) | High permeability | 4.21 | 41.2 | Low permeability | 1.25 | 38.7 |
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