Study on advanced produced water treatment experiments of polymer flooding

Based on the study of polymer-bearing produced water from a produced water treatment station in Daqing Oilfield, a produced water treatment experiment has been done to produced water after secondary degreasing and filtering.Rational combined parameters have been confirmed by the analysis of addition of H₂O2 and O₃, intensity of UV Lamp, the initial pH value as well as influences of treatment time on HPAM.Experiments has been done on influences of the oil content changes on polymer and waste oil elimination ratio, and then the range of oil-bearing content of original waste water has been confirmed.Experiments of damaging degree of produced water to core permeability before and after treatment show that it is economically feasible to use advanced Oxidation Treatment Technology because the water quality after treatment can meet the requirements of produced water reinjection.