Аннотация
Sand pack flooding tests were conducted in order to study the displacement of East Moldabek (Kazakhstan) viscous oil (140cp) by quenched polyampholytes from high permeability (16 Darcy) porous media. The injection of the polyampholytes resulted in only 0.3–1% incremental oil recovery. However, taking into account high permeability and oil viscosity, as well as homogeneity of the sand we can expect better performance in layered heterogeneous models with lower oil viscosity. Another test has been done by using 30% hydrolyzed 17 mln Da polyacrylamide dissolved in 15 g/L NaCl. The incremental oil recovery was equal to 5%. Future research will aim comparison between polyacrylamide and polyampholytes at higher salinity, temperature and reservoir heterogeneity conditions.