Abstract
ABSTRACTRecently, a flexible gridding technique known as Voronoi or perpendicular bisection (PEBI) grid has received some attention in the petroleum literature. The main advantage of this grid is that individual gridpoints can be specified anywhere inside the domain regardless of the position of any other points. This paper describes a practical way of using Voronoi grids for field scale simulation. Gridpoints are easily generated by using modules of known geometry which can be located, scaled or rotated in any position. Physical properties are specified at points that are independent of the computational grid. Also, a new well model for Voronoi grids is proposed.It is shown that, while the results of hybrid-Cartesian and hybrid-hexagonal grids are less sensitive to grid orientation than purely hexagonal grids or the 9-point scheme for the cases investigated, they are still dependent on the number of gridblocks.
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