Finite element modelling of the effective elastic properties of partially saturated rocks

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• 作者：Dina Makarynska ; Boris Gurevich ; Radim Ciz ; Christoph H. Arns ; Mark A. Knackstedt
• 关键词：Poroelasticity ; Partial saturation ; Effective elastic properties of rocks ; Finite element method ; Gassmann theory
• 刊名：Computers and Geosciences
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：34
• 期：6
• 页码：647-657
• 全文大小：1249 K

文摘

Simulation of effective physical properties from microtomographic 3D images of porous structures allows one to relate properties of rocks directly to their microstructure. A static FEM code has been previously used to estimate effective elastic properties of fully saturated monomineralic (quartz) rock under wet and dry conditions. We use the code to calculate elastic properties under partially saturated conditions. The numerical predictions are compared to the Gassmann theory combined with Wood's formula (GW) for a mixture of pore fluids, which is exact for a monomineralic macroscopically homogeneous porous medium.