In-depth gel shows promise in Daqing IOR pilot

A field pilot, started in 1999, of an in-depth colloidal dispersion gel (CDG) in the Daqing oil field had favorable economics and increased oil recovery from the pilot area. This success has led to subsequent expanded pilots in Daqing and plans for pilots in other waterfloods in China.Injection of CDG into an appropriate reservoir can increase oil recovery by improving vertical sweep efficiency of the injected fluid.DaqingDaqing is the largest oil field in China and produces more than 900,000 bo/d from multiple sands and reservoirs. A unit of PetroChina Co. Ltd. operates the field, which is in China’s northern Heilongjiang province.First commercial oil from the field flowed in 1959,...

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