Relative permeability of gas and water flow in hydrate-bearing porous media: A micro-scale study by lattice Boltzmann simulation

The water-gas relative permeability is an important parameter to characterize multiphase flow in sediments. To study the of hydrate-bearing porous media, simulations were carried out at pore scale using lattice Boltzmann method. effects hydrate saturation and hydrate-growth habits on permeability, which scaled by considering only, evaluated a two-dimensional medium. Results show that increase causes decrease effective as expected. However, effect different from permeability. increases with pore-filling case. decreases grain-coating wettability solid phase has wetting nonwetting phase. Jamin (phase blocking) was observed may exist production gas natural reservoirs. This seriously affects characteristics. changes microscale fluid distribution relationship between characterization parameters analyzed.