In the performance evaluation of any reservoir, a knowledge of the pattern of fluid flow within the reservoir is essential. This is especially true in the case of reservoirs under waterflood, where an analysis of injected fluid migration within the porous medium is very important. Hence, reservoir simulation has become a valuable tool for reservoir engineers, allowing them to gain greater insight into fluid flow within the reservoir. If properly conducted, a simulation study can aid in optimizing depletion by answering many specific questions related to a given reservoir.

This paper describes a single phase, two-dimensional, compressible front tracking model for microcomputers, which can be used to simulate waterfloods. It can be used for any type of heterogeneous reservoir with variable thickness, permeability, porosity and flow boundaries.

A complete discussion of the mathematical model, operating logic of the program, and sensitivity to input data is provided. Also, a listing of the program in FORTRAN is included. Anyone with access to a microcomputer can use the program to analyze the anticipated pattern of injected fluid migration within the reservoir as a function of time.

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