Constructing Three-Phase Capillary Pressure Functions by Parameter Matching Using a Modified Ensemble Kalman Filter

Usuallyextendedtwo-phase capillarypressuresareusedinthree-phasesim- ulations, because three-phase capillary pressures are not possible or hard to measure. In this work three-phase capillary pressure surfaces are created by at pore network model. The input parameters to this network model are found by matching two-phase capillary pressure curves. This matching is done with a slightly modified EnKF rou- tine. Tables with three-phase capillary pressures are created and used as input to flow simulations.