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The impact of drainage displacement patterns and Haines jumps on CO2 storage efficiency

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Title: The impact of drainage displacement patterns and Haines jumps on CO2 storage efficiency
Authors: Zacharoudiou, I
Boek, E
Crawshaw, J
Item Type: Journal Article
Abstract: Injection of CO2 deep underground into porous rocks, such as saline aquifers, appears to be a promising tool for reducing CO2 emissions and the consequent climate change. During this process CO2 displaces brine from individual pores and the sequence in which this happens determines the efficiency with which the rock is filled with CO2 at the large scale. At the pore scale, displacements are controlled by the balance of capillary, viscous and inertial forces. We simulate this process by a numerical technique, multi-GPU Lattice Boltzmann, using X-ray images of the rock pores. The simulations show the three types of fluid displacement patterns, at the larger scale, that have been previously observed in both experiments and simulations: viscous fingering, capillary fingering and stable displacement. Here we examine the impact of the patterns on storage efficiency and then focus on slow flows, where displacements at the pore scale typically happen by sudden jumps in the position of the interface between brine and CO2, Haines jumps. During these jumps, the fluid in surrounding pores can rearrange in a way that prevent later displacements in nearby pores, potentially reducing the efficiency with which the CO2 fills the total available volume in the rock.
Issue Date: 22-Oct-2018
Date of Acceptance: 28-Sep-2018
URI: http://hdl.handle.net/10044/1/65158
DOI: https://dx.doi.org/10.1038/s41598-018-33502-y
ISSN: 2045-2322
Publisher: Nature Publishing Group
Journal / Book Title: Scientific Reports
Volume: 8
Copyright Statement: ©The Author(s) 2018. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Sponsor/Funder: Qatar Petroleum
Funder's Grant Number: N/A
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
LATTICE BOLTZMANN SIMULATIONS
POROUS-MEDIA
PORE-SCALE
2-PHASE FLOW
INTERFACIAL-TENSION
FLUID DISPLACEMENT
MULTIPHASE FLOW
3 DIMENSIONS
CAPILLARY
DYNAMICS
Publication Status: Published
Article Number: ARTN 15561
Appears in Collections:Faculty of Engineering
Chemical Engineering



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