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- W2048602713 abstract "Abstract The numerical study of water coning requires an accurate spatial discretization around the wells which may lead to a large number of grid blocks. Local refinement is therefore desired since it allows for a coarse underlying grid without loosing numerical resolution around the wells. This paper investigates the applicability of flexible gridding to study coning in both vertical and horizontal wells. These techniques can also be used for multiwell, full field coning studies. A simple sector geometry including a producer and an injector is used. A two step approach is then followed: in the first case, it is assumed that the effects of heterogeneities are negligible and average petrophysical properties are used. In the second part, the heterogeneity of the system is also considered. For both cases, a fine grid simulation on the entire domain is used as the reference response. Various areal hybrid geometries around the producer are then investigated and their response is compared with the reference cases. For the vertical producer, the hybrid geometries are based on a coarse Cartesian grid with either a cylindrical or a Cartesian refinement around the well. For the horizontal producer only an areal Cartesian refinement is considered. In this case though, the hybrid geometry becomes particularly interesting for wells that are not aligned with the overall Cartesian grid. For these cases, the hybrid gridding techniques allow a local Cartesian refinement that is aligned with the well. For ail cases investigated, the fine grid results can be reproduced by the hybrid geometries provided that an adequate vertical discretization is used. For both vertical and horizontal producers, the various responses suggest that grid refinement is more important than its geometry." @default.
- W2048602713 created "2016-06-24" @default.
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- W2048602713 date "1993-04-03" @default.
- W2048602713 modified "2023-09-24" @default.
- W2048602713 title "Flexible Gridding Techniques for Coning Studies in Vertical and Horizontal Wells" @default.
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- W2048602713 doi "https://doi.org/10.2118/25563-ms" @default.
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