C
apillarity plays a vital role in the petroleum industry by significantly influencing the dynamics and dispersion of fluids within porous rock formations, especially in hydrocarbon reservoirs. The central involvement of capillary forces in displacing fluids within the pore spaces of reservoir rock is crucial for comprehending the movement of oil, water, and gas throughout the reservoir over time. The impact of capillary pressure on the distribution and saturation of fluids within the reservoir rock determines the extent to which the pore space is occupied by oil, water, or gas under specific conditions.