Abstract: By using selfmade electrolytic reactor, the field produced water of the Central Sichuan Oil and Gas Exploratory Development Corporation is electrolyzed to make investigation of process conditions regarding current density and electrolytic time, etc, and the COD value of the water is measured by sealing method. Based on an overall consideration of reducing the concentration of chloride ion, reducing the COD value and absorbency, the optimal condition of treating high chloride ion produced water is that current density should be controlled in the range of 1A to 2A and the electrolytic time in the range of 30mins to 90mins. Using this technique to treat high chloride ion, the process is simple, the pollution is little, the investment is low while the result is excellent.

Key words: produced water treatment, electrolysis, coagulation flocculation, chloride ion, produced water