Analysis and reuse of produced waters from polymer-flooded reservoirs

Some typical produced water samples from polymer flooded reservoirs in Daqing and Dagang Oil Fields are analysized quantitatively for inorganic ions, environmental contaminants, and polyacrylamide. The question of the waste water disposal/reuse is comprehensively discussed on the basis of the data obtained. It is concluded that such oilfield produced waters, being damaging to environment, must not be discharged and should be treated properly as flooding water. In their treatments the polymer contained should be maximally maintained.