This paper presents the development and application of an In-Situ combustion model designed to simulate a laboratory combustion tube. This model is a first step to a comprehensive field model. It considers both mass and heat balance equations. Combustion is assumed to occur from direct burning of oil. Except for this assumption, the simulator rigorously considers the flow of different fluid phases through a combustion tube. To expand the mass and heat balance equations, we use a fully implicit finite difference scheme. The resulting system of equations is solved simultaneously.
The model calculates data on pressure, temperature and saturation distribution inside a combustion tube. These data are compared to published laboratory combustion tube data as well as other existing numerical simulators.
In addition, the model also simulates hot water flooding and steam injection. Calculated temperature and saturation distribution for both of these processes are presented.