Study on displacement efficiency of new flooding agent in Bohai oifield

Facing the technology demand of BoHai oilfield development,aiming at improve the recovery target and using the modern physical simulation,the flow properties and flooding effects of six new oil displacement agent have been evaluated.The results show that the flow properties and flooding effects of foam compound system is the best,improve the recovery 26.1% relative to water flooding,second,the surfactant/polymer compound system and the PA-2 polymer,improve the recovery 19.3% and 17.6%,the "PA-1polymer+ES mesospheric" system is the worst,improve the recovery only 14.0% and 11.7%.The EOR Technology after Polymer Flooding is poor,improve the recovery only 2.8% relative to polymer flooding.