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Fluid substitution in porous rocks with aligned cracks: Theory versus numerical modeling

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Open access
Authors
Brown, L.
Gurevich, Boris
Makarynska, D.
Arns, C.
Knackstedt, M.
Date
2006
Type
Conference Paper

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Brown, L. and Gurevich, B. and Makarynska, D. and Arns, C. and Knackstedt, M. 2006. Fluid substitution in porous rocks with aligned cracks: Theory versus numerical modeling, in Proceedings of the International Exposition and 76th Annual Meeting, Oct 1-6 2006, pp. 1846-1850. New Orleans, Louisiana: SEG.
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Society of Exploration Geophysicists - SEG International Exposition and 76tth Annual Meeting 2006, SEG 2006
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School
WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
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Use of this publication is subject to SEG terms of use and conditions at https://seg.org/Terms-of-Use

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Abstract

The effect of penny-shaped cracks on the elastic properties of porous media is modeled using static finite element modeling (FEM) code. Anisotropic Gassmann theory is used to predict the effective properties of the saturated cracked media from their dry properties. There is an excellent agreement between numerical results and theory, with a small error associated with partially inequilibrated patches of fluid in the FEM. These patches of fluid result in a residual stiffness which can be subtracted from the FEM results to further improve agreement with Gassmann theory.