Polymer flooding technology as the leading tertiary oil recovery technology, is the next most important existing technology to improve oil recovery techniques. EOR in oil resources diminishing, continued high oil price situation, with very good prospects for development and economic benefits.
　　To replac the amount of oil resources and backing of recoverable reserves become increasingly tense, the main oil-producing region in the eastern basin, Bohai Bay and the western regions. Since the eighties, the old eastern oil fields, including Daqing Oilfield, Shengli Oilfield, Liaohe Oilfield, the Dagang Oilfield, Huabei Oilfield, the Zhongyuan Oilfield. Have been developed in the late high water cut, reservoir mining imbalances have become increasingly prominent, and as a strategy to replac the oil in the western region development of oil resources in the short term and very difficult to have a big breakthrough. Eastern main oil fields rely on technological progress, adding new reserves found to enhance oil recovery, increasing recoverable reserves is to ensure high and stable yields of crude oil, petroleum resources to realize the only way to succeed virtuous circle.
　　EOR has become one of the main measures of the old oilfields, since 1996, polymer flooding technology have been in the oilfield of Daqing, Shengli, Dagang, Zhongyuan, Xinjiang and other applications to achieve the industrialization, China EOR oil production has reached annual output of more than 8%.