Daqing pilot shows effectiveness of high-concentration polymer flooding

A flexible development plan and careful reservoir management carried out by an integrated team succeeded in implementing a high-concentration polymer flood pilot in Daqing oil field in northern China.Initially the field operator considered injection of high-concentration polymer to be high-risk and marginally economic. But results of the core flood experiments and a pilot project show that this technology can enhance oil recovery economically.Enhancing oil recoveryIn many cases, about 60-70% of the oil remains in the reservoir after waterflooding. This remaining oil is the target for various enhanced oil recovery methods.According to literature,1 2 polymer flooding increases capillary num...

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