Research Article
Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence
Table 5
WASP granularity analysis data from checking wells.
| | Layer | Average air permeability (μm2) | Fine sand content (%) | Silt content (%) | Clay content (%) | Sorting coefficient | Median size (mm) |
| | Reserved layer | 0.365 | 38.6 | 47.6 | 13.8 | 3.0 | 0.088 | | Unreserved layer | 0.023 | 10.3 | 66.9 | 22.8 | 4.2 | 0.049 |
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