Enhanced oil recovery techniques - petrofed.winwinho...

Chemical EOR ProcessPolymer ProcessThe objective of polymer flooding is to provide betterdisplacement and volumetric sweep efficiencies during awater flood. They do not lower the residual oil saturation.They improve recovery by increasing the viscosity ofwater, decreasing the mobility of water, contacting a largevolume of the reservoir and reducing the injected fluidmobility to improve aerial and vertical sweep efficiencies.Because, polymer flooding inhibits fingering, the oildisplacement is more efficient in the early stages ascompared to a conventional water-flood