Research Article
Mechanism of Surfactant Enhancement of CO2 Displacement Recovery in Interlayer Shale Oil Reservoirs
Table 2
ODE and pore proportion in different media of rock samples.
(a) CO2 |
| No. | Flow volume/PV | Pore throats | Absolute ODE contribution/% | ODE/% |
| 1 | 5 | Small pore | 14.45 | 84.21 | Medium pore | 42.93 | Macropore | 27.38 | 20 | Small pore | 16.32 | 87.44 | Medium pore | 43.61 | Macropore | 27.51 | 2 | 5 | Small pore | 2.66 | 74.34 | Medium pore | 34.44 | Macropore | 37.24 | 20 | Small pore | 8.67 | 89.88 | Medium pore | 42.94 | Macropore | 38.28 | 3 | 5 | Small pore | 4.77 | 25.15 | Medium pore | 11.93 | Macropore | 8.45 | 20 | Small pore | 14.29 | 77.85 | Medium pore | 45.16 | Macropore | 18.40 |
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(b) Surfactant + CO2 |
| No. | Flow volume/PV | Pore throats | Absolute ODE contribution/% | ODE/% |
| 4 | 5 | Small pore | 16.19 | 85.02 | Medium pore | 41.42 | Macropore | 27.41 | 20 | Small pore | 17.83 | 87.86 | Medium pore | 42.87 | Macropore | 27.16 | 5 | 5 | Small pore | 4.99 | 83.99 | Medium pore | 41.47 | Macropore | 37.54 | 20 | Small pore | 10.64 | 91.22 | Medium pore | 42.97 | Macropore | 37.60 | 6 | 5 | Small pore | 6.70 | 57.81 | Medium pore | 33.52 | Macropore | 17.59 | 20 | Small pore | 17.90 | 80.85 | Medium pore | 44.43 | Macropore | 18.53 |
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