Construction and characteristics of three-phase foam system with micro and nano particles
In order to further improve the oil recovery after polymer flooding,a micro-nanoparticle three-phase foam system with self-adaptive plugging and flooding function was constructed considering the reservoir characteristics after polymer flood-ing.The characteristics of micro-nanoparticle three-phase foam system were studied by viscosity,interface,foam,and plug-ging and flooding performance experiment.The correlation between solution characteristics and oil displacement effect of three-phase foam system was analyzed by normalization method and weight coefficient method.The results show that the char-acteristic parameters of the three-phase foam system with soft micro particles are good and it has ultra-low interfacial tension.Its profile improvement rate is more than 82%,and it can enhance oil recovery by more than 14%after polymer flooding.The characteristic parameters of the hard nanoparticles three-phase foam system are relatively poor,but it can still enhance oil recovery by more than 10%after polymer flooding.The foam comprehensive index and kinematic viscosity of three-phase foam system are the main influencing factors of oil displacement effect,while the shear viscosity and interfacial tension are secondary influencing factors.
micro and nano particlesthree-phase foam systemafter polymer floodingviscosityprofile improvement rate
国家科技期刊平台
NSTL
万方数据
维普
