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International Journal for Multiscale Computational Engineering
IF: 1.016 5-Year IF: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Print: 1543-1649
ISSN Online: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2014011296
pages 529-547

MULTISCALE MULTIPHYSIC MIXED GEOMECHANICAL MODEL IN DEFORMABLE POROUS MEDIA

S. A. Sadrnejad
Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
Hasan Ghasemzadeh
K. N. Toosi University
Ehsan Taheri
Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran

ABSTRACT

Reservoir formations typically display high degrees of spatial variations over multiple length scales. Moreover, several physical phenomena affect the flow pattern in different hierarchies. However, a full description of flow and deformation that includes all these scales exceeds the current computational capabilities. To overcome this deficiency, each physical effect should be treated separately on its area of influence. In the present article, the fluid transport and deformation of porous media are determined through separate frameworks in different scales. The finite element method is combined with multiscale finite volume (MSFV) to solve the solid equilibrium and fluid flow equations. Interactions between soil and fluid multiscale frameworks are instated through tight iterative coupling. Then the Multiscale Multiphysic Mixed Geomechanical Model (M3GM) is presented. The M3GM not only maintains advanced features of MSFV in flow patterns but also improves with properties of finite elements in the soil domain. Finally, indicative test cases are analyzed and reasonable results are achieved.


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