Impact of Pore-Scale Characteristics on Immiscible Fluid Displacement

Figure 1

Boundaries of three displacement patterns with respect to and : stable displacement (upper right), viscous fingering (left), and capillary fingering (lower right). The symbols (circle, triangle, and square) represent the values of and used for the microfluidic chip experiment and the pore-network model or a lattice Boltzmann simulation in the literature. The lines indicate the phase boundaries identified in previous studies. The values of and used in previous studies have a very limited range, particularly in the transition zone. A wide range of and values (represented by grey dots) was used in the present study.