| Now many big oil fields have been in the development later period, the polymer floodingtechnology has been used widely to the oil field. Causes the ingredient of the oil field produced fluidcomplex. Gradually, demulsification and dehydration more difficult, the water quality of dehydration isnot good, oil cut is high. In view of the factors of influence emulsion stability, study the oil/waterseparation technology for produced liquid and oily water of polymer flooding is important to direct oilfield production, because the employment of polymer flooding, the stability for produced liquid and oilywater emulsion of the Daqing oil field well remarkable enhance, cause the oil field constructed treatmentfacility ability which handle produced liquid and oily water remarkable drop. The part oily water disposalstation because the handling ability insufficiently lead to the water quality seriously to exceed theallowed figure after witch is disposed. In order to solve the water-oil separation problem of Daqing oilfield polymer flooding produced liquid and oily water. This article take the actual produced liquid andoily water of polymer flooding which take from the scene as the medium. Studied the water-oilseparation characteristic of the produced liquid and oily water of polymer flooding and the stablemechanism of O/W crude oil emulsion. According to the water-oil separation characteristic of thepolymer flooding produced liquid and the transmission medium process of demulsifier in which,proposed an idea of using oil/water separation agent demulsifier and flocculant to solve water-oilseparation problem of the polymer flooding produced liquid and oily water, developed two oil/waterseparation agent which is separately suitable to the progress of the float eliminate oil and the subsidenceeliminate oil, solved the problem of the free water knockout turn on the water and oil content seriously toexceed the allowed figure for a long time after witch is disposed.
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