STUDY OF VISCOSITY STABILIZER FOR POLYMER FLOODING

The viscosity loss of polymer solution will affect the effect of the polymer flooding severely. bases on the characteristics and factors of polymer flooding, two kinds of stabilizers were designed, And evaluated its properties on improving and stabilizing of viscosity in laboratory, shows that the stabilizers not only improved the viscosity of the polymer solution but also stabilized the viscosity. When the concentration of stabilizers is between 800 and 1200 mg/L, the viscosity of polymer solution may be increased by two to five times and this can keeps stable more than 60 days. The rate of the viscosity loss of polymer solution is less than 15%. The stabilizers may be used in polymer flooding and depth profile control because they can compatibility well with the HPAM solution confected by tap water and brine.