Numerical Simulation of Reservoir Formation Damage Due to Mud Filtrate Invasions

This paper examined the numerical simulation of mud filtrate invasion process quantitatively with finite difference scheme that includes the effects of mudcake growth in oil well damage. Most of the existing models are empirical, experimental or rather complex. Efforts have been made to develop the linear flow model involving the modification of Darcy’s equation for determination of mudcake porosity-permeability and thickness through formation pressure near wellbore. The results show the effects of pressure transient on cake buildup over a considerable time intervals. Results also characterized cake parameters and time into low and high permeability zones that are strictly linear with pressure change and supercharging observed during the sensitive formation testing.