Research Article
Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence
Table 14
Daqing formation brine composition [
86]].
| Layer | pH | , mg/L | , mg/L | Cl, mg/L | , mg/L | Ca2+, mg/L | Mg2+, mg/L | K+, mg/L | Na+, mg/L | TDS, mg/L |
| S | 8.42 | 139.33 | 1342.62 | 2363.87 | 66.34 | 25.39 | 9.44 | 49.43 | 2091.06 | 6037.88 | P | 8.30 | 183.30 | 2285.74 | 3299.08 | 280.21 | 35.97 | 9.07 | 217.56 | 2982.04 | 9234.84 |
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