Table 9. Effect of Mixed Solvents with Low and High Injection Rates on the Permeability.
| solvent | equivalent injection rate (bbl/min) | initial permeability (mD) | permeability after damage (mD) | permeability after solvent injection (mD) | damage due to asphaltene deposition (%) | efficiency of the solvent (%) |
|---|---|---|---|---|---|---|
| xylene and gas condensate | 1 | 5.83 | 1.12 | 2.19 | 81 | 29.68 |
| xylene and gas condensate | 3 | 7.28 | 1.31 | 2.01 | 82 | 22.42 |
| kerosene and gas condensate | 1 | 9.83 | 1.67 | 1.75 | 83 | 13.87 |
| kerosene and gas condensate | 3 | 11.48 | 1.59 | 1.62 | 86 | 8.71 |
| gasoline and gas condensate | 1 | 7.12 | 1.24 | 1.79 | 83 | 17.64 |
| gasoline and gas condensate | 3 | 7.71 | 1.32 | 1.54 | 83 | 13.57 |