Investigation of Spontaneous Imbibition Behavior in a 3D Pore Space Under Reservoir Condition by Lattice Boltzmann Method

Spontaneous imbibition (SI) of the injected fluid into pore space a tight oil reservoir and replacing crude therein has been considered as one possible mechanisms in increasing recovery. Such deeply buried rocks is usually under high-pressure high-temperature conditions. Besides, their interior porous structures are characterized irregular bodies slit-shaped throats. As result, an accurate description SI behavior driven by capillary force real conditions crucial to understand process uncover controlling mechanisms. An improved multi-component pseudo-potential lattice Boltzmann method was developed simulate representative 3D extracted from sandstone rock. Comparison ambient condition showed that latter case exhibited two times faster imbibition. Moreover, snap-off droplet phenomenon observed surrounded The droplets stuck accounted for 9.47% volume. These results indicated importance investigating structure actual condition. proposed pore-scale simulation provides useful tool understanding complex pattern resulted enhanced