Oil displacement performance of stabilized foam system by SiO_2 nanoparticles

The performances of SiO2+ SDS foam system were investigated by using Warning Blender method,through which the optimum amount of SiO2 nanoparticles was determined. And the influences of temperature and salinity on foam properties were studied as well. The plugging ability,diversion ability,and oil displacement performance for SDS and SiO2+ SDS foam systems were characterized and compared by means of the core displacement experimental facilities. Also the microscopic visualization test was conducted to compare the oil displacement performance of water flooding,SDS and SiO2+ SDS foam systems on the dead-end pores. The results show that SiO2+ SDS foam system is more stable than SDS foam system,which can significantly improve the plugging,diversion,and oil displacement ability. Also the displacement effect for dead-end pores is increased as well.