Research Article
Experimental Study on Optimization of Polymer Preslug Viscosity of ASP Flooding in Interlayer Heterogeneous Well Group Artificial Sandstone Core
Table 3
Experiment scheme for viscosity optimization of polymer preslug.
| Name of chemical slug | Slug size PV | Polymer concentration mg/L | System viscosity mPa·s | Alkali concentration wt% | Surfactant concentration wt% |
| Polymer preslug | | | | | | 1 | 0.093 | 1900 | 40 | —— | —— | 2 | 0.075 | 2360 | 60 | —— | —— | 3 | 0.064 | 2775 | 80 | —— | —— | ASP main slug | 0.3 | 2450 | 30 | 1.2 | 0.3 | ASP secondary slug | 0.2 | 2300 | 30 | 1.0 | 0.1 | Subsequent polymer slug | 0.2 | 1635 | 30 | —— | —— |
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