A new approach to reservoir modeling and simulation using boundary representation, adaptive unstructured meshes and the discontinuous overlapping control volume finite element method

P. Salinas*, J. R. Percival, D. Pavlidis, Z. Xie, J. Gomes, C. C. Pain, M. D. Jackson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a new, high-order, control-volume-finite-element (CVFE) method with discontinuous Nthorder representation for pressure and (N+1)th-order for velocity. The method conserves mass and ensures that the extended Darcy equations for multi-phase flow are exactly enforced, but does not require the use of control volumes (CVs) that span domain boundaries. We demonstrate that the approach, amongst other features, accurately preserves sharp saturation changes associated with high aspect ratio geologic features such as fractures and mudstones, allowing efficient simulation of flow in highly heterogeneous models. Moreover, in conjunction with dynamic mesh optimization, in which the mesh adapts in space and time to key solution fields such as pressure, velocity or saturation whilst honoring a surface-based representation of the underlying geologic heterogeneity, accurate solutions are obtained at significantly lower computational cost than an equivalent fine, fixed mesh and conventional CVFE methods. The work presented is significant for two reasons. First, it resolves a longstanding problem associated with the use of classical CVFE methods to model flow in highly heterogeneous porous media; second, it reduces computational cost/increases solution accuracy through the use of dynamic mesh optimization without compromising parallelization.

Original languageEnglish
Title of host publication77th EAGE Conference and Exhibition 2015
Subtitle of host publicationEarth Science for Energy and Environment
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Pages241-245
Number of pages5
ISBN (Electronic)9781510806627
DOIs
Publication statusPublished - 1 Jan 2015
Event77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment: Earth Science for Energy and Environment - Spain, Madrid, Spain
Duration: 1 Jun 20154 Jun 2015

Conference

Conference77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment
CountrySpain
CityMadrid
Period1/06/154/06/15

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