Modelagem multiescala de escoamento multifásico em meios poroelásticos fraturados

• Ano de defesa: 2007
• Autor(a) principal: Baptista, Riedson
• Orientador(a): Murad, Marcio Arab
• Banca de defesa: Loula, Abimael Fernando Dourado , Moyne, Christian , Souto, Helio Pedro Amaral
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Laboratório Nacional de Computação Científica
• Programa de Pós-Graduação: Programa de Pós-Graduação em Modelagem Computacional
• Departamento: Serviço de Análise e Apoio a Formação de Recursos Humanos
• País: Brasil
• Palavras-chave em Português: Ciência dos materiais; Materiais porosos; Modelagem multiescala
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
• Link de acesso: https://tede.lncc.br/handle/tede/207

In this work we propose a model of two scales to describe the two-phase drainage in fractured poroelasty environment. The derivation of the macroscopic model is obtained through a technique of homogenization of periodic structures applied to the micromechanical model that governs the micro-structure of the environment composed by matrix poroelastic surrounded by a related net of fractures filled out by two Newtonian incompressible immiscible fluids, such as water and oil. In this context, our main result consists of obtaining a hierarchy of macroscopic models with effective parameters. The constituent theory that governs the behavior of these parameters is built through resolution of the local problems of closing that appear of the process of scale change. Among the homogenized parameters we give a particular emphasis to the constituent law obtained for the stress of the effective tensions. Besides the poroelastic behavior with the deformation of the porous skeleton this exhibits the additional dependence with the intermolecular tensions emerging of the discontinuity of the saturation between the systems of blocks and fractures. Numerical simulations of the local cells problems obtained by the method of the finite elements are explored in the reconstruction of the constituent laws of the homogenized coefficients.