Introduction : Chemical Oil Recovery
|Method||Primary Mechanism||Secondary Mechanism||Adv./Disadv.|
|Gas Flooding||Miscibility; swelling of oil = decrease in viscosity||Pressure maintenance|
|Water Flooding||Pressure maintenance||Dec. mobility ratio|
|Polymer Flooding||Reduction in IFT||Dec. mobility ratio|
|Surfactant Flooding||Reduction in IFT||Dec. mobility ratio/cap. pressure|
|Alkaline Flooding||Reduction in IFT||Dec. mobility ratio/cap. pressure|
Factors effecting incremental oil recovery
The incremental oil recovery obtained during any EOR method can be subcategorize into
- Vertical sweep efficiency (Ez)
This is affected by Mobility ratio; Relative Permeability; Capillary Pressure.
- Areal Sweep efficiency (Ea)
This is affected by Mobility ratio, Heterogeneity, Miscibility.
- What is the best way to quantify incremental oil recovery?
- Is there advantage of ASP over just polymer flooding?
- Is polymer flooding another name for viscosified water flooding?
- When will surfactant flooding preferred over polymer flooding?