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| oil solution type | interval | equation P (MPa) B. N. ( – ) | the ratio of the 2nd interval slope to the 1st interval slope (%) |
|---|---|---|---|
| without nanoparticles | 1st interval | B.N. = 0.0933P + 0.8447 | 73.42 |
| 2nd interval | B.N. = 0.0284P + 1.2594 | ||
| with nanoparticles | 1st interval | B.N. = 0.0957P + 0.8340 | 47.03 |
| 2nd interval | B.N. = 0.0507P + 1.1237 |
