Experiments on imbibition mechanisms of fractured reservoirs by microfluidic chips

YU Fuwei,GAO Zhendong,ZHU Wenhao,WANG Chuan,LIU Fan,XU Fei,JIANG Hanqiao,LI Junjian

Fig. 10. Occurrence states of residual oil after the oil and wettability alteration solution imbibition in scheme B-1. ① Large oil droplets formed by the shearing effect, which are trapped in the pores due to the restriction of throats; ② Oil not completely peeling off from the wall surface in the pores due to adhesion; ③ Continuous oil occupying the whole pores.