Research Article
A Research on the Effect of Heterogeneities on Sandstone Matrix Acidizing Performance
| | Parameters | Value | Parameters | Value |
| | Concentration of hydrochloric acid (wt%) | 12 | Injection rate (m3/min/m) | 0.1 | | Concentration of hydrofluoric acid (wt%) | 3 | Temperature (°C) | 80 | | Density of silica gel (kg/m3) | 740 | Radius of wellbore (m) | 0.1 | | Density of fast-reacting mineral (kg/m3) | 2600 | Radius of calculation domain (m) | 2 | | Density of slow-reacting mineral (kg/m3) | 2650 | Viscosity of acid fluid | 1 | | Molecular weight of M3 (kg/kmole) | 96 | Acid density (kg/m3) | 1075 | | Molecular weight of M2 (kg/kmole) | 60 | M1-specific area (m3/m2) | 3235000 | | Molecular weight of M2 (kg/kmole) | 262 | M2-specific area (m3/m2) | 52000 | | Dissolving power of HF to M1 | 0.486 | Silica gel specific area (m3/m2) | 3300000 | | Dissolving power of HF to M2 | 0.5 | Dissolving power of H2SiF6 to M1 | 2.47 | | Dissolving power of HF to M3 | 0.8 | Dissolving power of HCl to carbonate | 1.37 | | Coefficient of reaction equations () | 27, 6, 6, 1, 3, 1, 1, 2.5 |
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