Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment
<p>To inform cost-effective monitoring of offshore geological storage of carbon dioxide (CO<sub>2</sub>), a unique field experiment, designed to simulate leakage of CO<sub>2</sub> from a sub-seafloor storage reservoir, was carried out in the central North Sea....
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Elsevier
2021
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| _version_ | 1797080676499980288 |
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| author | Flohr, A Matter, JM James, RH Saw, K Brown, R Gros, J Flude, S Day, C Peel, K Connelly, D Pearce, CR Strong, JA Lichtschlag, A Hillegonds, DJ Ballentine, CJ Tyne, RL |
| author_facet | Flohr, A Matter, JM James, RH Saw, K Brown, R Gros, J Flude, S Day, C Peel, K Connelly, D Pearce, CR Strong, JA Lichtschlag, A Hillegonds, DJ Ballentine, CJ Tyne, RL |
| author_sort | Flohr, A |
| collection | OXFORD |
| description | <p>To inform cost-effective monitoring of offshore geological storage of carbon dioxide (CO<sub>2</sub>), a unique field experiment, designed to simulate leakage of CO<sub>2</sub> from a sub-seafloor storage reservoir, was carried out in the central North Sea. A total of 675 kg of CO<sub>2</sub> were released into the shallow sediments (∼3 m below seafloor) for 11 days at flow rates between 6 and 143 kg d<sup>-1</sup>. A set of natural, inherent tracers (<sup>13</sup>C, <sup>18</sup>O) of injected CO<sub>2</sub> and added, non-toxic tracer gases (octafluoropropane, sulfur hexafluoride, krypton, methane) were used to test their applicability for CO<sub>2</sub> leakage attribution and quantification in the marine environment. All tracers except <sup>18</sup>O were capable of attributing the CO<sub>2</sub> source. Tracer analyses indicate that CO<sub>2</sub> dissolution in sediment pore waters ranged from 35 % at the lowest injection rate to 41% at the highest injection rate. Direct measurements of gas released from the sediment into the water column suggest that 22 % to 48 % of the injected CO<sub>2</sub> exited the seafloor at, respectively, the lowest and the highest injection rate. The remainder of injected CO<sub>2</sub> accumulated in gas pockets in the sediment. The methodologies can be used to rapidly confirm the source of leaking CO<sub>2</sub> once seabed samples are retrieved.</p> |
| first_indexed | 2024-03-07T01:03:31Z |
| format | Journal article |
| id | oxford-uuid:8a870fe4-b880-40c0-b39b-6643224df417 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:03:31Z |
| publishDate | 2021 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:8a870fe4-b880-40c0-b39b-6643224df4172022-03-26T22:32:13ZUtility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experimentJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8a870fe4-b880-40c0-b39b-6643224df417EnglishSymplectic ElementsElsevier2021Flohr, AMatter, JMJames, RHSaw, KBrown, RGros, JFlude, SDay, CPeel, KConnelly, DPearce, CRStrong, JALichtschlag, AHillegonds, DJBallentine, CJTyne, RL<p>To inform cost-effective monitoring of offshore geological storage of carbon dioxide (CO<sub>2</sub>), a unique field experiment, designed to simulate leakage of CO<sub>2</sub> from a sub-seafloor storage reservoir, was carried out in the central North Sea. A total of 675 kg of CO<sub>2</sub> were released into the shallow sediments (∼3 m below seafloor) for 11 days at flow rates between 6 and 143 kg d<sup>-1</sup>. A set of natural, inherent tracers (<sup>13</sup>C, <sup>18</sup>O) of injected CO<sub>2</sub> and added, non-toxic tracer gases (octafluoropropane, sulfur hexafluoride, krypton, methane) were used to test their applicability for CO<sub>2</sub> leakage attribution and quantification in the marine environment. All tracers except <sup>18</sup>O were capable of attributing the CO<sub>2</sub> source. Tracer analyses indicate that CO<sub>2</sub> dissolution in sediment pore waters ranged from 35 % at the lowest injection rate to 41% at the highest injection rate. Direct measurements of gas released from the sediment into the water column suggest that 22 % to 48 % of the injected CO<sub>2</sub> exited the seafloor at, respectively, the lowest and the highest injection rate. The remainder of injected CO<sub>2</sub> accumulated in gas pockets in the sediment. The methodologies can be used to rapidly confirm the source of leaking CO<sub>2</sub> once seabed samples are retrieved.</p> |
| spellingShingle | Flohr, A Matter, JM James, RH Saw, K Brown, R Gros, J Flude, S Day, C Peel, K Connelly, D Pearce, CR Strong, JA Lichtschlag, A Hillegonds, DJ Ballentine, CJ Tyne, RL Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment |
| title | Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment |
| title_full | Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment |
| title_fullStr | Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment |
| title_full_unstemmed | Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment |
| title_short | Utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled CO2 release experiment |
| title_sort | utility of natural and artificial geochemical tracers for leakage monitoring and quantification during an offshore controlled co2 release experiment |
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