An accurate understanding of the internal architecture of a reservoir is required to improve oil recovery forecasts.

This article describes a software which gives 3D images of this architecture using conditional geostatistical simulations and provides tools to study the influence of these lithological descriptions on fluid flow behavior.

This software establishes the link between wells data and fluid flow reservoir simulators. Each step of this interactive and graphic system is explained here:

  • geological and geostatistical analysis to characterize a suitable model for the following steps,

  • conditional geostatistical simulations giving a lithological description of the internal heterogeneities on high resolution grids,

  • quantification of the reservoir assigning petrophysical values to each lithofacies grid cell (porosity and absolute permeability tensor),

  • scaling up methods computing in a cost effective way the averaged petrophysical values associated to reservoir simulator grid cells.

This new software concept which integrates multidisciplinary methods helps production geologists, geostatisticians, applied mathematicians and reservoir engineers to work in the same environment.

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