how to model perched water oil reservoir under equilibrium in eclipse

Hi there, i have a perched water situation with 2 FWLs in one reservoirs. this is proven from 2 wells drilled in this reservoir. the question is how do i model this under equilibrium? i figured that i need to create 2 EQLNUMs , one assigned FWL (for the deepest FWL) in EQUIL with Pc=0 , the other i have to assign OWC (in EQUIL) with Pc= some positive number based on pressure of perched head= FWL (shallow)-FWL(Deep). many thanks for your thoughts