variavel0=<b>Eliana Luci Ligero</b> - eligero@dep.fem.unicamp.br Universidade Estadual de Campinas
<b>Célio Maschio</b> - celio@dep.fem.unicamp.br Universidade Estadual de Campinas
<b>Denis José Schiozer</b> - denis@dep.fem.unicamp.br niversidade Estadual de Campinas
<b>Abstract.</b> Upscaling technics allow the properties of a fine grid to be adapted for a larger simulation grid. One of the reservoir properties that is treated with upscalling is the absolute permeability. Generally, simple algebric formulas and numerical methods like finite differences are used in the upscalling process for this property. For the ideal case, the results obtained with the simulation of the coarse grid should be the same to the results obtained with the corresponding fine grid. However, the substitution of the propertie values of several fine blocks for an only course block implies in loss of information. Therefore, it is necessary to adopt a strategy in order to approximate the results of both simulations. This work considers the special treatment for the coarse blocks containing wells to provide a better similarity between the results for both fine and coarse grids. The quality of the upscaling process is determined through the comparison of the results for the simulation of the corresponding grids. This process is applied in different grids that are representative of petroleum reservoirs. It can be verified the importance of the special treatment for a coarse block containing a well and the difficulty of determinig a methodology combining upscalling technic and well treatment that can be applied in all cases.
<b>Keywords.</b> Upscaling, Absolute permeability, Well treatment, Reservoir numerical simulation.