Table 1.
Physicochemical analyses of injection water (IW) and produced water (PW) samples.
| Water | pH | NaCl | Sulfate | Acetate | Propionate | NH4+ |
|---|---|---|---|---|---|---|
| chemistry | (Meq) | (mM) | (mM) | (mM) | (mM) | |
| Injection water (IW) 2014-2015 | ||||||
| IW1\_14 | 6.74 | 0.48 | 28 | 0.11 | 0 | 0.11 |
| IW1\_15 | 6.51 | 0.55 | 27.6 | 0.02 | 0 | 0.34 |
| IW5\_15 | 6.42 | 0.53 | 19.8 | 0 | 0 | 0.32 |
| Average ± SD | 6.56 ± 0.17 | 0.52 ± 0.04 | 25.1 ± 4.6 | 0.04 ± 0.06 | 0 | 0.26 ± 0.13 |
| Produced Water (PW) 2014-2015 | ||||||
| PW1\_14 | 6.75 | 0.4 | 16.8 | 2.26 | 0.24 | 1.24 |
| PW1\_15 | 6.97 | 0.69 | 22.14 | 1.85 | 0.08 | 1.4 |
| PWC2\_5\_15 | 6.7 | 0.55 | 13.8 | 0.28 | 0.02 | 0.46 |
| PWF2\_5\_15 | 6.7 | 0.64 | 8.9 | 1.76 | 0.17 | 1.06 |
| Average ± SD | 6.78 ± 0.13 | 0.57 ± 0.13 | 15.4 ± 5.5 | 1.54 ± 0.87 | 0.13 ± 0.10 | 1.04 ± 0.41 |