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3D Modeling of Fracture Flow in Core Samples Using μ-CT Data

S. Hoyer1 U. Exner2 M. Voorn1 A. Rath3
1Department of Geodynamics and Sedimentology, University of Vienna, Austria
2Museum of Natural History, Vienna, Austria
3OMV ESG-D Production Geology, Vienna, Austria

Pathlines through a 3x3x3 mm sample.

Knowledge on flow behavior in fractured reservoir rocks is of great interest in petroleum engineering as well as for geothermal assets. Due to the big difference of magnitude (fracture aperture: ~μm, lateral extension of reservoirs ~km), modeling of discrete fracture flow is not practicable on the reservoir scale, so a Darcy (or Brinkman) approximation has to be found. The key task is to find proper permeability values for the different zones of the reservoir. The approach of the present study is to model discrete fracture flow in core samples to assess equivalent directional permeability values. The distribution of fractures in the core samples was assessed using μCT with a resolution in the range of about ten to hundred μm.

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