Research Article
Influence of Oil Viscosity on Alkaline Flooding for Enhanced Heavy Oil Recovery
Table 2
Summary of sandpack flooding tests for different heavy oils.
| Run no. | Heavy oil | Permeability (mD) | Initial oil saturation (%) | Chemical formula | Equilibrium IFT (mN/m) | Recovery (%) | Water flooding | Alkaline flooding | Total |
| 1 | Zhuangxi | 570 | 90.0 | 0.25% NaOH + 0.5% NaCl | 0.600 | 29.0 | 22.9 | 51.9 | 2 | Zhuangxi | 488 | 82.4 | 0.5% NaOH + 0.5% NaCl | 0.064 | 36.7 | 26.7 | 63.4 | 3 | Zhuangxi | 570 | 84.9 | 1% NaOH + 0.5% NaCl | 0.200 | 23.1 | 29.7 | 52.8 | 4 | Zhuangxi | 1120 | 83.7 | 0.25% NaOH + 0.5% NaCl | 0.600 | 36.7 | 7.2 | 43.9 | 5 | Zhuangxi | 985 | 88.1 | 0.5% NaOH + 0.5% NaCl | 0.064 | 37.5 | 12.4 | 49.9 | 6 | Zhuangxi | 1075 | 84.5 | 1% NaOH + 0.5% NaCl | 0.200 | 35.5 | 16.5 | 52.0 | 7 | Zhuangxi | 1875 | 88.0 | 0.25% NaOH + 0.5% NaCl | 0.600 | 39.4 | 5.6 | 45.0 | 8 | Zhuangxi | 2080 | 87.4 | 0.5% NaOH + 0.5% NaCl | 0.064 | 39.9 | 9.3 | 49.2 | 9 | Zhuangxi | 2125 | 89.5 | 1% NaOH + 0.5% NaCl | 0.200 | 40.6 | 10.4 | 51.0 | 10 | Chenzhuang | 558 | 85.1 | 0.25% NaOH + 0.5% NaCl | 0.122 | 31.8 | 14.7 | 46.5 | 11 | Chenzhuang | 577 | 82.6 | 0.5% NaOH + 0.5% NaCl | 0.096 | 33.2 | 20.1 | 53.3 | 12 | Chenzhuang | 543 | 86.3 | 1% NaOH + 0.5% NaCl | 0.180 | 35.3 | 21.3 | 56.6 | 13 | Chenzhuang | 1025 | 84.4 | 0.25% NaOH + 0.5% NaCl | 0.122 | 35.8 | 15.3 | 51.1 | 14 | Chenzhuang | 1180 | 85.7 | 0.5% NaOH + 0.5% NaCl | 0.096 | 37.3 | 21.4 | 58.7 | 15 | Chenzhuang | 1065 | 84.2 | 1% NaOH + 0.5% NaCl | 0.180 | 37.8 | 23.9 | 61.7 | 16 | Chenzhuang | 2135 | 89.1 | 0.25% NaOH + 0.5% NaCl | 0.122 | 40.2 | 8.6 | 48.8 | 17 | Chenzhuang | 2110 | 86.1 | 0.5% NaOH + 0.5% NaCl | 0.096 | 39.8 | 12.9 | 52.7 | 18 | Chenzhuang | 2240 | 88.5 | 1% NaOH + 0.5% NaCl | 0.180 | 40.2 | 13.5 | 53.7 |
|
|