Technical differences between microbubble flooding and air foam flooding and adjustment countermeasures
After field test,microbubble flooding and air foam flooding have strong adaptabil-ity in low permeability and high water cut reservoirs,but there are still shortcomings in un-derstanding the mechanism of the two gas flooding and the way of adjusting technical poli-cies.Based on in-depth study of the differences in the mechanism and displacement charac-teristics of the two gas flooding technologies,combined with the field dynamic adjustment ef-fect,this paper holds that the microbubble flooding is mainly physical foaming,the displace-ment characteristics are gas-liquid co-flooding,the technical policy of low gas-liquid ratio(1.0∶3.0)is adopted.The air foam flooding is mainly chemical foaming,and the driving characteristics are gas flooding,supplemented by liquid phase,and the adjustment idea of gas-liquid ratio(3.0∶1.0)is adopted,and the adjustment of gas flooding separate injection test is put forward.The effect of water control and oil increase was significantly improved,and the trend of enhanced oil recovery was good.It has certain reference and guiding signifi-cance for adjusting the boundary of two kinds of gas drive technologies in similar reservoirs.
NETL
NSTL
万方数据
维普
