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A dual porosity model of high pressure gas flow for geoenergy applications

Hosking, Lee, Thomas, Hywel and Sedighi, Majid 2018. A dual porosity model of high pressure gas flow for geoenergy applications. Canadian Geotechnical Journal 55 (6) , pp. 839-851. 10.1139/cgj-2016-0532

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Abstract

This paper presents the development of a dual porosity numerical model of multiphase, multicomponent chemical/gas transport using a coupled thermal, hydraulic, chemical and mechanical formulation. Appropriate relationships are used to describe the transport properties of non-ideal, reactive gas mixtures at high pressure, enabling the study of geoenergy applications such as geological carbon sequestration. Theoretical descriptions of the key transport processes are based on a dual porosity approach considering the fracture network and porous matrix as distinct continua over the domain. Flow between the pore regions is handled using mass exchange terms and the model includes equilibrium and kinetically-controlled chemical reactions. A numerical solution is obtained with a finite element and finite difference approach and verification of the model is pursued to build confidence in the accuracy of the implementation of the dual porosity governing equations. In the course of these tests, the time splitting approach used to couple the transport, mass exchange and chemical reaction modules is shown to have been successfully applied. It is claimed that the modelling platform developed provides an advanced tool for the study of high pressure gas transport, storage and displacement for geoenergy applications involving multiphase, multicomponent chemical/gas transport in dual porosity media, such as geological carbon sequestration.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: NRC Research Press
ISSN: 0008-3674
Date of Acceptance: 5 October 2017
Last Modified: 24 Apr 2019 10:33
URI: http://orca.cf.ac.uk/id/eprint/109195

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