Algorithms for coupled mechanical deformations and fluid flow in a porous medium with different time scales.

Abstract : The production of oil in soft highly compacted reservoirs produces a significant reduction in the pore space which in turn causes the surface to subside. The authors couple two simulators to model the mechanical deformations in the presence of a Darcy flow, both one- and two-phase. The simulators solve for flow in a porous medium using a finite volume method, and solve for the mechanical deformation of the porous media using a finite element method. The flow equations and the deformation equations are coupled using Biot's law. The authors use two different methods for the coupling: the first uses a staggered algorithm; the second is based on a preconditioned conjugate method. The authors use a multiscale method in both approaches. The authors show that the inf-sup condition is not satisfied, because of the mixed discretization which is done by using two separate simulators. The authors give convergence comparisons for the two methods for several examples. Two of the examples are for the linear problem (one-phase) where they know the exact solution and one is for the nonlinear problem (two-phase). In all cases, the preconditioned conjugate algorithm is faster and more robust, in particular when the inf-sup condition is not satisfied. In the nonlinear problem the authors state that the results agree with physical predictions but do not give actual empirical data. Finally, they show the effects of grid orientation on the nonlinear problem.
Type de document :
Article dans une revue
International Journal of Numerical Analysis and Modeling, Institute for Scientific Computing and Information, 2009, 5 (4), pp.635-658
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Contributeur : Jacques Laminie <>
Soumis le : lundi 10 septembre 2012 - 18:19:23
Dernière modification le : mercredi 4 janvier 2017 - 16:19:33

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  • HAL Id : hal-00730673, version 1

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Jacques Laminie, Fatima Zahra Daim, Danielle Hilhorst, Robert Eymard. Algorithms for coupled mechanical deformations and fluid flow in a porous medium with different time scales.. International Journal of Numerical Analysis and Modeling, Institute for Scientific Computing and Information, 2009, 5 (4), pp.635-658. 〈hal-00730673〉

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