Treatment Technology and Process of Produced Water for Reinjection in Oilfield

The reinjection of produced water after treatment in oilfield can avoid environment pollution and save production cost.However,underproof injection water would not only damage the stratum but also cause corrosion and scaling in gathering system and well bores.The characteristics and developing actuality of conditional three-step method and special treatment technologies for water containing viscous oil or polymer are compared,and new treatment technology is discussed.Future development of produced water treatment technology and some suggestions are presented.There are some limitations in conditional produced water treatment technology which needs to be improved.New treatment technology,such as filtration of suspended sludge (SSF) and membrane bioreactor,should be developed in order to increase economic benefit for the oilfield.