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Many EOR methods have been tested after water flooding in Daqing Oilfield.CO-2,natural gas, micellar, microbial, steam, polymer and ASP flooding have been tested in the lab and field (some field tests have been performed). Most of the results are good. CO-2,natural gas,micellar are not suitable to be used in Daqing Oilfield. Polymer flooding of pilots and industrial scale have been successful. The results of polymer flooding are related closely to the injection parameters and injection methods. The incremental oil production are 100 to 140 tons of oil per ton of polymer injected. The oil recovery increased 10% to 14%OOIP. ASP flooding is successful. The cost of chemicals per barrel of incremental oil is $4 0 to $6 2.The incremental recovery is 18% to 20% OOIP over water flooding.
Many EOR methods have been tested after water flooding in Daqing Oilfield. CO - 2, natural gas, micellar, microbial, steam, polymer and ASP flooding have been tested in the lab and field (some field tests have been performed). Most of the results are good. CO - 2, natural gas, micellar are not suitable to be used in Daqing Oilfield. Polymer flooding of pilots and industrial scale have been successful. The results of polymer flooding are related closely to the injection parameters and The flooding recovery is 10% to 14% OOIP. ASP flooding is successful. The cost of chemicals per barrel of incremental oil is $ 4 0 to $ 6 2.The incremental recovery is 18% to 20% OOIP over water flooding.