Research Article
A New Multichelating Acid System for High-Temperature Sandstone Reservoirs
Table 4
Chelating agent’s effect on silica gel precipitate.
| Sample | 30 min | 90 min | 120 min | Concentration of Si (mg/L) | Amount of silica gel precipitate (mg) | Concentration of Si (mg/L) | Amount of silica gel precipitate (mg) | Concentration of Si (mg/L) | Amount of silica gel precipitate (mg) |
| No chelating agent (2000 mg/L) | 1243.12 | 129.48 | 765.29 | 211.22 | 586.44 | 241.82 | Chelating agent added (4000 mg/L) | 3810.63 | 32.39 | 3613.13 | 66.18 | 3020.63 | 167.54 |
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