Research Article
Studies on a Foam System of Ultralow Interfacial Tension Applied in Daqing Oilfield after Polymer Flooding
Table 2
Foam flooding results of a parallel natural core.
| | Sort | Core number | Gas permeability (m2) | Oil saturation
(%) | Water flooding EOR (%) | HPAM flooding EOR (%) | Foam flooding EOR (%) | Total EOR (%) |
| | 1 |
L-20 | 0.886 | 69.3 | 50.6 | 9.6 | 9.6 | 69.8 | | L-23 | 0.316 | 67.2 | 46.3 | 7.8 | 11.8 | 65.9 | | Average | | | 48.5 | 8.7 | 10.7 | 67.9 |
| | 2 | L-54 | 0.714 | 63.0 | 43.8 | 13.1 | 8.9 | 65.8 | | L-59 | 0.353 | 65.4 | 46.1 | 6.2 | 12.2 | 64.5 | | Average | | | 45.0 | 9.6 | 10.5 | 65.1 |
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