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Fault Representation in Flow Simulation Models - Sensitivity to Grid StructureNormal access

Authors: V. Papanikolaou and T. Manzocchi
Event name: 79th EAGE Conference and Exhibition 2017
Session: Reservoir Studies - New Techniques
Publication date: 12 June 2017
DOI: 10.3997/2214-4609.201700989
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 762.74Kb )
Price: € 20

Faults are represented into flow simulation models as 2D surfaces rather than 3D volumes. The conventional GRDECL format does not allow complicated structures to be incorporated in the simulation grid, while the Stair-Step and the GSG format are more flexible with regards to more complicated fault geometries. This geometrical flexibility of the grid formats is tested on a number of 3D models, representing fault geometries with different geometrical characteristics, with the scope of investigating the strength and weaknesses of these formats. An experiment focused on how differently the GRDECL and the Stair-Step formats behave with regards to accurate juxtapositions and flow behaviour. Initial results demonstrate that there is some deviation between the two formats, due to both incorrect juxtapositions of the Stair-Step format and non-orthogonality biases of the GRDECL format.

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