Research Article
Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence
Table 4
SASP granularity analysis data from checking wells.
| | Layers | Big sand content (%) | Fine sand content (%) | Silt content (%) | Clay content (%) | Sorting coefficient | Median size (mm) |
| | SII3-4 | 1.0 | 49.8 | 37.7 | 9.7 | 3.0 | 0.105 | | SII7-8 | 21.1 | 49.0 | 21.3 | 8.6 | 3.6 | 0.161 | | SII8-9 | | 20.1 | 66.1 | 13.8 | 4.1 | 0.062 | | SII8-9 | 5.2 | 48.9 | 35.3 | 9.0 | 3.3 | 0.117 | | Average | 9.1 | 42.0 | 40.1 | 10.3 | 3.5 | 0.111 |
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