Abstract
Abstract Reservoir simulations in the past have usually been made using Cartesian grid systems. However, the Industry's current integration of reservoir simulation and reservoir characterization has demonstrated the need for more flexible gridding methods. Flexible grids allow the incorporation of more accurate reservoir descriptions into reservoir studies, but generally result in more complex simulation mathematics and decreased simulation speed. Only curvilinear orthogonal grids offer increased flexibility without such complications. This paper describes a simple method for generating grids of this type. It provides several examples of curvilinear orthogonal grids and compares their simulation results with those of Cartesian grids using a real reservoir.
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