Geological modelling is frequently carried out in two stages. Initially a layer-and fault-based framework is constructed where the main goal is to represent faithfully the 3D geometry of the real geology, as imaged by seismic data. At this stage close attention is paid to the shape, location and connectivity of fault planes. The second stage usually involves cellularization of the framework to a 3D corner-point geometry and it is here that the detailed sedimentological and physical property attributes are modelled into the structure. The corner point geometry is used because the endpoint of the process is a model that is designed for reservoir flow solvers.So where is the best place to address the impacts of faults on fluid flow; in the geological resolution framework model, or in the upscaled geocellular model? This talk describes an approach to modelling that encompasses both the geological and geocellular domain. We also examine the impact on the predicted fault zone properties such as permeability, derived from shale gouge ratio, and their concomitant effect on transmissibility multipliers.
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