All fluid-flow simulations were done using the 1996A version of Eclipse, a three-phase, three-dimensional, general purpose black-oil simulator from GeoQuest. Black-oil is a term used to describe a set of simplifying assumptions used for modeling hydrocarbon phase behavior, in which all components are lumped into two pseudocomponents, oil and gas. Unfortunately, the words gas and oil are also used to distinguish between the vapor and liquid phase, sometimes confusing the uninitiated reader. Water is usually present as a third component and phase. The bulk of fluid flow simulations in the industry are done using the black-oil model.