Research Article
Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence
Table 13
Injection water comparison.
| Block | Ca2+, mg/L | Mg2+, mg/L | Cl, mg/L | , mg/L | , mg/L | , mg/L | K+ + Na+, mg/L | TDS, mg/L | pH |
| SASP | 37.17 | 10.33 | 832.8 | 2226.39 | 289.66 | NA | 1549.83 | 4968.18 | 7.97 | WASP | 40.1 | 12.2 | 895.1 | 3065.2 | 63.1 | 6 | 1718.4 | 5800.1 | 8.4 |
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