The Influence of Velocity Field Approximations in Tracer Injection Processes

Autores

  • Yoisell R. Núñez Universidade Federal Fluminense
  • Cristiane Oliveira Faria Universidade do Estado do Rio de Janeiro http://orcid.org/0000-0002-0402-7185
  • Sandra M. C. Malta Laboratório Nacional de Computação Científica
  • Abimael F. D. Loula Laboratório Nacional de Computação Científica

DOI:

https://doi.org/10.5540/tema.2018.019.02.347

Palavras-chave:

Miscible displacements, Hybridized method, Oil reservoir simulations

Resumo

Although the concentration is the most important variable in tracer injection processes, an efficient and accurate velocity field approximation is crucial to obtain a good physical behaviour for the problem.  In this paper we analyse a Stabilized Dual Hybrid Mixed (SDHM)  method  to solve  the  Darcy's system in the velocity and pressure variables that involves the conservation of mass and Darcy's law.  This approach  is locally conservative, free of compromise between the finite element approximation spaces and capable of dealing with heterogeneous media with discontinuous properties. The tracer concentration is solved via a combination of the Streamline Upwind Petrov-Galerkin (SUPG) method in space with an implicit finite difference scheme in time. We also employ a semi-analytical approach (Abbaszadeh-Dehghani analytical solution) to integrate the transport equation. A  numerical comparative study using the SDHM formulation, the Galerkin method and a post-processing technique to calculate the velocity field in combination  with those concentration approximation methodologies are presented. In all comparisons, the SDHM formulation appears as the most efficient, accurate and almost free of spurious oscillations.

Biografia do Autor

Yoisell R. Núñez, Universidade Federal Fluminense

Instituto de Ciências Exatas

Cristiane Oliveira Faria, Universidade do Estado do Rio de Janeiro

Instituto de Matemática e Estatística

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Publicado

2018-09-12

Como Citar

Núñez, Y. R., Faria, C. O., Malta, S. M. C., & Loula, A. F. D. (2018). The Influence of Velocity Field Approximations in Tracer Injection Processes. Trends in Computational and Applied Mathematics, 19(2), 347. https://doi.org/10.5540/tema.2018.019.02.347

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