Key Points:
- Relative permeability in two-phase flow is calculated in a
three-dimensional digital Berea rock using Lattice Boltzmann Method
- Relative permeability varies due to lubrication effect, shear drag
force effect, and capillary force, and is related to fluid
connectivity
- Relative permeability on viscosity ratio-capillary number diagram is
created to predict spatiotemporal variation of reservoir permeability