Abstract
To be successful in the flooding processes used in enhanced oil recovery, polymer molecules must have large hydrodynamic size in aqueous solution. Large hydrodynamic size permits high aqueous solution viscosity at low polymer concentrations. When high polymer concentrations are required to enhance solution viscosity reservoir flooding is not economically attractive. Typical flooding processes use polymer solutions having concentrations of one-half to one gram per liter (500 to 1000 ppm). At these concentrations, solution viscosities from 5 to 10 times that of water must be obtained for sufficient mobility control during flooding.
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