Study on polymer viscosity reducers of viscous crude oil

Abstract

The viscous crude oil from Suizhong 36-1 oilfield with low content of wax,high content of gum and asphaltene,the viscosity of degassed crude oil is 56 200 mPa·s at 40 ℃.With respect to the problem of viscosity-reduction of viscous crude oil recovery,a kind of viscosity reducer comprising styrene/higher alcohol(methyl-)acrylate/acrylamide or maleic anhydride terpolymer was synthesized,and it's ability of viscosity reducing was evaluated.Results show that the synthesized polymer viscosity reducer HOT-RP had good viscosity reduction effect,its viscosity-reducing rate is over 85% at dosage of 500～800 mg/L.