Daqing Oil Field started industrial scale polymer (polyacrylamide) flooding in 1996. More than 3,000 wells are on polymer flood. The cumulative production by polymer flood is more than 400 million bbl, and annual production of year 2002 about 80 million bbl.

Actual field economic data show that the total cost (including depreciation) per bbl of polymer oil is about $9, the same as water flooding in the same area. Analysis of the data show that high incremental recovery (about 12% OOIP – original oil in place), high production rate (about 4 times that of water flooding) and low water oil ratio (a decrease of about 5 fold) are the main reasons polymer flooding obtained such good economic results.

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