Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples
Carbon dioxide (CO2) sequestration in porous, sedimentary reservoirs is a key technology to mitigate emissions of anthropogenic CO2 and curb irreversible climate change. The abundance of carbonate formations, both as saline aquifers and hydrocarbon reservoirs, makes future CO2 storage in carbonate f...
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ftunivbergen:oai:bora.uib.no:11250/3112159 2024-02-11T10:02:52+01:00 Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples Haugen, Malin Folkvord, Olav Parelius Veien, Torunn Fernø, Martin Brattekås, Bergit 2023 application/pdf https://hdl.handle.net/11250/3112159 https://doi.org/10.1016/j.jgsce.2023.205139 eng eng Elsevier Norges forskningsråd: 324818 Norges forskningsråd: 280341 Norges forskningsråd: 331841 urn:issn:1875-5100 https://hdl.handle.net/11250/3112159 https://doi.org/10.1016/j.jgsce.2023.205139 cristin:2180780 Journal of Natural Gas Science and Engineering. 2023, 119 (Part A), 205139. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2023 The Author(s) 205139 Journal of Natural Gas Science and Engineering 119 Part A Journal article Peer reviewed 2023 ftunivbergen https://doi.org/10.1016/j.jgsce.2023.205139 2024-01-25T00:08:37Z Carbon dioxide (CO2) sequestration in porous, sedimentary reservoirs is a key technology to mitigate emissions of anthropogenic CO2 and curb irreversible climate change. The abundance of carbonate formations, both as saline aquifers and hydrocarbon reservoirs, makes future CO2 storage in carbonate formations highly likely. The weak carbonic acid that forms when CO2 dissolves in water will, however, interact with highly reactive carbonate. Preferential flow paths may form during dissolution or calcite precipitation may reduce injectivity - both processes significantly impacting reservoir sweep efficiency. Hence, understanding the dynamics of the dissolution processes and their influence on flow properties is necessary to safely store CO2 in carbonate formations. Darcy and sub-Darcy scale dissolution kinetics were here assessed in carbonate core plugs with and without pre-existing highly permeable pathways, during multiphase flow and under relevant storage conditions. Darcy-scale dissolution and precipitation data (injectivity changes, effluent analysis and mass loss) confirmed that CO2 and brine co-injections altered the carbonate rock structure on Darcy scale, but could not determine the cause of change. Multi-modal imaging was applied to independently quantify structural changes with computed tomography (CT) and aqueous flow characteristics with positron emission tomography (PET), thereby determining injectivity dependence on local flow patterns. Formation of high permeability pathways, which was expected due to rock dissolution, was only observed in cores with pre-existing open fractures, where reactive flow was limited to the fracture plane. A good correlation between the two imaging modules was found: areas of higher porosity yielded a low-density CT signal (i.e. high number of voids present) and a high PET signal density (i.e. large volume of traced fluid present). Loss of injectivity suggested local changes in the flow pattern due to blocking of pore throats by moving particles or secondary precipitation ... Article in Journal/Newspaper Carbonic acid University of Bergen: Bergen Open Research Archive (BORA-UiB) Gas Science and Engineering 119 205139 |
institution |
Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Carbon dioxide (CO2) sequestration in porous, sedimentary reservoirs is a key technology to mitigate emissions of anthropogenic CO2 and curb irreversible climate change. The abundance of carbonate formations, both as saline aquifers and hydrocarbon reservoirs, makes future CO2 storage in carbonate formations highly likely. The weak carbonic acid that forms when CO2 dissolves in water will, however, interact with highly reactive carbonate. Preferential flow paths may form during dissolution or calcite precipitation may reduce injectivity - both processes significantly impacting reservoir sweep efficiency. Hence, understanding the dynamics of the dissolution processes and their influence on flow properties is necessary to safely store CO2 in carbonate formations. Darcy and sub-Darcy scale dissolution kinetics were here assessed in carbonate core plugs with and without pre-existing highly permeable pathways, during multiphase flow and under relevant storage conditions. Darcy-scale dissolution and precipitation data (injectivity changes, effluent analysis and mass loss) confirmed that CO2 and brine co-injections altered the carbonate rock structure on Darcy scale, but could not determine the cause of change. Multi-modal imaging was applied to independently quantify structural changes with computed tomography (CT) and aqueous flow characteristics with positron emission tomography (PET), thereby determining injectivity dependence on local flow patterns. Formation of high permeability pathways, which was expected due to rock dissolution, was only observed in cores with pre-existing open fractures, where reactive flow was limited to the fracture plane. A good correlation between the two imaging modules was found: areas of higher porosity yielded a low-density CT signal (i.e. high number of voids present) and a high PET signal density (i.e. large volume of traced fluid present). Loss of injectivity suggested local changes in the flow pattern due to blocking of pore throats by moving particles or secondary precipitation ... |
format |
Article in Journal/Newspaper |
author |
Haugen, Malin Folkvord, Olav Parelius Veien, Torunn Fernø, Martin Brattekås, Bergit |
spellingShingle |
Haugen, Malin Folkvord, Olav Parelius Veien, Torunn Fernø, Martin Brattekås, Bergit Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
author_facet |
Haugen, Malin Folkvord, Olav Parelius Veien, Torunn Fernø, Martin Brattekås, Bergit |
author_sort |
Haugen, Malin |
title |
Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
title_short |
Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
title_full |
Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
title_fullStr |
Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
title_full_unstemmed |
Multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
title_sort |
multi-scale dissolution dynamics for carbon sequestration in carbonate rock samples |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3112159 https://doi.org/10.1016/j.jgsce.2023.205139 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
205139 Journal of Natural Gas Science and Engineering 119 Part A |
op_relation |
Norges forskningsråd: 324818 Norges forskningsråd: 280341 Norges forskningsråd: 331841 urn:issn:1875-5100 https://hdl.handle.net/11250/3112159 https://doi.org/10.1016/j.jgsce.2023.205139 cristin:2180780 Journal of Natural Gas Science and Engineering. 2023, 119 (Part A), 205139. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2023 The Author(s) |
op_doi |
https://doi.org/10.1016/j.jgsce.2023.205139 |
container_title |
Gas Science and Engineering |
container_volume |
119 |
container_start_page |
205139 |
_version_ |
1790598962680430592 |