Solute driven transient convection in layered porous media

Emmanuel Edet Luther; Seyed M. Shariatipour; Michael Dallaston; Ran Holtzman

doi:10.1007/978-3-030-63916-7_1

Solute driven transient convection in layered porous media

Emmanuel Edet Luther, Seyed M. Shariatipour, Michael Dallaston, Ran Holtzman

Queensland University of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

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Abstract

CO2 geological sequestration has been proposed as a climate change mitigation strategy that can contribute towards meeting the Paris Agreement. A key process on which successful injection of CO2 into deep saline aquifer relies on is the dissolution of CO2 in brine. CO2 dissolution improves storage security and reduces risk of leakage by (i) removing the CO2 from a highly mobile fluid phase and (ii) triggering gravity-induced convective instability which accelerates the downward migration of dissolved CO2. Our understanding of CO2 density-driven convection in geologic media is limited. Studies on transient convective instability are mostly in homogeneous systems or in systems with heterogeneity in the form of random permeability distribution or dispersed impermeable barriers. However, layering which exist naturally in sedimentary geological formations has not received much research attention on transient convection. Therefore, we investigate the role of layering on the onset time of convective instability and on the flow pattern beyond the onset time during CO2 storage. We find that while layering has no significant effect on the onset time, it has an impact on the CO2 flux. Our findings suggest that detailed reservoir characterisation is required to forecast the ability of a formation to sequester CO2.

Original language	English
Title of host publication	Energy and Sustainable Futures
Subtitle of host publication	Proceedings of 2nd ICESF 2020
Editors	Pandelis Kourtessis, Amin Al-Habaibeh, Abhishek Asthana, Vladimir Vukovic, John Senior
Chapter	1
Pages	3-9
Number of pages	7
ISBN (Electronic)	978-3-030-63916-7
DOIs	https://doi.org/10.1007/978-3-030-63916-7_1
Publication status	Published - 1 Jan 2021
Event	2nd International Conference on Energy and Sustainable Futures - Online, United Kingdom Duration: 10 Sept 2020 → 11 Sept 2020 Conference number: 2

Publication series

Name	Springer Proceedings in Energy
Publisher	Springer
ISSN (Print)	2352-2534
ISSN (Electronic)	2352-2542

Conference

Conference	2nd International Conference on Energy and Sustainable Futures
Abbreviated title	ICESF 2020
Country/Territory	United Kingdom
Period	10/09/20 → 11/09/20

Bibliographical note

This chapter is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), 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 chapter are included in the chapter's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the chapter'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.

Keywords

Layered heterogeneity
Convection
Numerical simulations
CO2 storage
Climate change

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/978-3-030-63916-7_1Licence: CC BY

Luther2021_Chapter_SoluteDrivenTransientConvectioFinal published version, 324 KBLicence: CC BY

Cite this

Solute driven transient convection in layered porous media. / Luther, Emmanuel Edet; Shariatipour, Seyed M.; Dallaston, Michael et al.
Energy and Sustainable Futures: Proceedings of 2nd ICESF 2020. ed. / Pandelis Kourtessis; Amin Al-Habaibeh; Abhishek Asthana; Vladimir Vukovic; John Senior. 2021. p. 3-9 (Springer Proceedings in Energy).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

Luther, EE, Shariatipour, SM, Dallaston, M & Holtzman, R 2021, Solute driven transient convection in layered porous media. in P Kourtessis, A Al-Habaibeh, A Asthana, V Vukovic & J Senior (eds), Energy and Sustainable Futures: Proceedings of 2nd ICESF 2020. Springer Proceedings in Energy, pp. 3-9, 2nd International Conference on Energy and Sustainable Futures , United Kingdom, 10/09/20. https://doi.org/10.1007/978-3-030-63916-7_1

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abstract = "CO2 geological sequestration has been proposed as a climate change mitigation strategy that can contribute towards meeting the Paris Agreement. A key process on which successful injection of CO2 into deep saline aquifer relies on is the dissolution of CO2 in brine. CO2 dissolution improves storage security and reduces risk of leakage by (i) removing the CO2 from a highly mobile fluid phase and (ii) triggering gravity-induced convective instability which accelerates the downward migration of dissolved CO2. Our understanding of CO2 density-driven convection in geologic media is limited. Studies on transient convective instability are mostly in homogeneous systems or in systems with heterogeneity in the form of random permeability distribution or dispersed impermeable barriers. However, layering which exist naturally in sedimentary geological formations has not received much research attention on transient convection. Therefore, we investigate the role of layering on the onset time of convective instability and on the flow pattern beyond the onset time during CO2 storage. We find that while layering has no significant effect on the onset time, it has an impact on the CO2 flux. Our findings suggest that detailed reservoir characterisation is required to forecast the ability of a formation to sequester CO2.",

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N2 - CO2 geological sequestration has been proposed as a climate change mitigation strategy that can contribute towards meeting the Paris Agreement. A key process on which successful injection of CO2 into deep saline aquifer relies on is the dissolution of CO2 in brine. CO2 dissolution improves storage security and reduces risk of leakage by (i) removing the CO2 from a highly mobile fluid phase and (ii) triggering gravity-induced convective instability which accelerates the downward migration of dissolved CO2. Our understanding of CO2 density-driven convection in geologic media is limited. Studies on transient convective instability are mostly in homogeneous systems or in systems with heterogeneity in the form of random permeability distribution or dispersed impermeable barriers. However, layering which exist naturally in sedimentary geological formations has not received much research attention on transient convection. Therefore, we investigate the role of layering on the onset time of convective instability and on the flow pattern beyond the onset time during CO2 storage. We find that while layering has no significant effect on the onset time, it has an impact on the CO2 flux. Our findings suggest that detailed reservoir characterisation is required to forecast the ability of a formation to sequester CO2.

AB - CO2 geological sequestration has been proposed as a climate change mitigation strategy that can contribute towards meeting the Paris Agreement. A key process on which successful injection of CO2 into deep saline aquifer relies on is the dissolution of CO2 in brine. CO2 dissolution improves storage security and reduces risk of leakage by (i) removing the CO2 from a highly mobile fluid phase and (ii) triggering gravity-induced convective instability which accelerates the downward migration of dissolved CO2. Our understanding of CO2 density-driven convection in geologic media is limited. Studies on transient convective instability are mostly in homogeneous systems or in systems with heterogeneity in the form of random permeability distribution or dispersed impermeable barriers. However, layering which exist naturally in sedimentary geological formations has not received much research attention on transient convection. Therefore, we investigate the role of layering on the onset time of convective instability and on the flow pattern beyond the onset time during CO2 storage. We find that while layering has no significant effect on the onset time, it has an impact on the CO2 flux. Our findings suggest that detailed reservoir characterisation is required to forecast the ability of a formation to sequester CO2.

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ER -

Solute driven transient convection in layered porous media

Abstract

Publication series

Conference

Bibliographical note

Keywords

UN SDGs

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