Table 6. Effect of Retention Time during Low-Rate Injection of Xylene on Improved Permeability.
injection rate (cm3/min) | retention time (days) | initial permeability (mD) | permeability after damage (mD) | permeability after solvent injection (mD) | damage due to asphaltene deposition (%) | efficiency of the solvent (%) |
---|---|---|---|---|---|---|
1.68 | 1 | 6.83 | 1.14 | 2.19 | 83 | 32.06 |
1.88 | 2 | 5.83 | 1.12 | 2.19 | 81 | 37.56 |
1.50 | 3 | 8.19 | 1.62 | 3.19 | 80 | 38.95 |