Fully implicit mixed-hybrid finite-element discretization for general purpose subsurface reservoir simulation

Ahmad Abushaikha, Denis V. Voskov, Hamdi A. Tchelepi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We present a new fully-implicit, mixed-hybrid, finite-element (MHFE) discretization scheme for general-purpose compositional reservoir simulation. The locally conservative scheme solves the coupled momentum and mass balance equations simultaneously, and the fluid system is modeled using a cubic equation-of-state. We introduce a new conservative flux approach for the mass balance equations for this fully-implicit approach. We discuss the nonlinear solution procedure for the proposed approach, and we present extensive numerical tests to demonstrate the convergence and accuracy of the MHFE method using tetrahedral elements. We also compare the method to other advanced discretization schemes for unstructured meshes and tensor permeability. Finally, we illustrate the applicability and robustness of the method for highly heterogeneous reservoirs with unstructured grids.

Original languageEnglish
Pages (from-to)514-538
Number of pages25
JournalJournal of Computational Physics
Volume346
DOIs
Publication statusPublished - 1 Oct 2017

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Keywords

  • Compositional modeling
  • Finite volume
  • Full tensor
  • Fully implicit
  • Mixed-hybrid finite element
  • Momentum and mass coupling
  • Reservoir simulation
  • Unstructured grids

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Computer Science Applications

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