Polymer flooding agent selection and performance evaluation in Chengbei Oilfield

In Chengbei Oilfeld, oil viscosity was high permeability of reservoirs was high and anisotropy of reservoirs was serious so the water drive development effect was not good and remaining oil reserves was much.At present,water cut of Chengbei Oilfield was about 90%, and degree of oil recovery was 30%, working hours of production platform has reached the design life and advanced development technology with high efficiency was in urgent need.Taking reservoir geology, fluid property and the current development situation in Chengbei Oilfield into consideration selection of polymer and polymer performance evaluation was carried out using indoor detection and theoretical analysis and polymer was optimized by fuzzy com-prehensive evaluation method.