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Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance

Shahid Manzoor, Michael G. Edwards, Ali H Dogru, Tareq M Al-Shaalan

Computational Geosciences, Volume: 22

Swansea University Author: Michael G. Edwards

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DOI (Published version): 10.1007/s10596-017-9686-4

Abstract

Grid generation for reservoir simulation must honor classical key constraints and ensure boundary alignment such that control-volume boundaries are aligned with geological features including layers, shale barriers, fractures, faults, pinch-outs, and multilateral wells. Novel unstructured grid genera...

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Published in: Computational Geosciences
ISSN: 1420-0597 1573-1499
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa35135
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spelling 2022-11-15T16:27:31.4109702 v2 35135 2017-09-06 Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance 8903caf3d43fca03602a72ed31d17c59 Michael G. Edwards Michael G. Edwards true false 2017-09-06 FGSEN Grid generation for reservoir simulation must honor classical key constraints and ensure boundary alignment such that control-volume boundaries are aligned with geological features including layers, shale barriers, fractures, faults, pinch-outs, and multilateral wells. Novel unstructured grid generation methods are proposed that automate control-volume and/or control point boundary alignment and yield perpendicular-bisector (PEBI) meshes both with respect to primal and dual (essentially PEBI) cells. In order to honor geological features in the primal configuration, we introduce the idea of protection circles that contain segments of key geological boundaries, while in order to generate a dual-cell feature aligned grid, we construct halos around key geological features. The grids generated are employed to study comparative performance of cell-centred versus cell-vertex flux-continuous control-volume distributed multi-point flux approximation (CVD-MPFA) finite-volume formulations using equivalent degrees of freedom and thus ensure application of the most efficient methods. The CVD-MPFA formulation (c.f. Edwards et al.) in cell-centred and cell-vertex modes is somewhat analogous and requires switching control-volume from primal to dual or vice versa, together with appropriate data structures and boundary conditions, however dual-cells are generated after primal grid generation. The relative benefits of both types of approximation, i.e., cell-centred versus vertex-centred, are contrasted in terms of flow resolution and degrees of freedom required. Journal Article Computational Geosciences 22 1420-0597 1573-1499 BAG, PEBI-Grid, Unstructured Delaunay triangulation, Control-volume distributed multipoint flux approximation, Cell-Centred vs vertex-centred CVD-MPFA, TPFA 31 12 2017 2017-12-31 10.1007/s10596-017-9686-4 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2022-11-15T16:27:31.4109702 2017-09-06T13:11:39.5043761 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Shahid Manzoor 1 Michael G. Edwards 2 Ali H Dogru 3 Tareq M Al-Shaalan 4 35135__14284__381d3f516ead461cbe14099f1cdb7a94.pdf 35135.pdf 2019-06-12T15:33:55.4830000 Output 9095637 application/pdf Version of Record true 2019-06-12T00:00:00.0000000 Released under the terms of a Creative Commons Attribution 4.0 International License (CC-BY). true eng
title Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
spellingShingle Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
Michael G. Edwards
title_short Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
title_full Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
title_fullStr Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
title_full_unstemmed Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
title_sort Interior boundary-aligned unstructured grid generation and cell-centered versus vertex-centered CVD-MPFA performance
author_id_str_mv 8903caf3d43fca03602a72ed31d17c59
author_id_fullname_str_mv 8903caf3d43fca03602a72ed31d17c59_***_Michael G. Edwards
author Michael G. Edwards
author2 Shahid Manzoor
Michael G. Edwards
Ali H Dogru
Tareq M Al-Shaalan
format Journal article
container_title Computational Geosciences
container_volume 22
publishDate 2017
institution Swansea University
issn 1420-0597
1573-1499
doi_str_mv 10.1007/s10596-017-9686-4
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Grid generation for reservoir simulation must honor classical key constraints and ensure boundary alignment such that control-volume boundaries are aligned with geological features including layers, shale barriers, fractures, faults, pinch-outs, and multilateral wells. Novel unstructured grid generation methods are proposed that automate control-volume and/or control point boundary alignment and yield perpendicular-bisector (PEBI) meshes both with respect to primal and dual (essentially PEBI) cells. In order to honor geological features in the primal configuration, we introduce the idea of protection circles that contain segments of key geological boundaries, while in order to generate a dual-cell feature aligned grid, we construct halos around key geological features. The grids generated are employed to study comparative performance of cell-centred versus cell-vertex flux-continuous control-volume distributed multi-point flux approximation (CVD-MPFA) finite-volume formulations using equivalent degrees of freedom and thus ensure application of the most efficient methods. The CVD-MPFA formulation (c.f. Edwards et al.) in cell-centred and cell-vertex modes is somewhat analogous and requires switching control-volume from primal to dual or vice versa, together with appropriate data structures and boundary conditions, however dual-cells are generated after primal grid generation. The relative benefits of both types of approximation, i.e., cell-centred versus vertex-centred, are contrasted in terms of flow resolution and degrees of freedom required.
published_date 2017-12-31T03:43:37Z
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score 11.037056

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