Product catalogue
Evaluating the performance of soil flux surveys and inversion methods for quantification of CO2 leakage
Understanding the near surface migration patterns and rates of efflux of CO<sub>2</sub> is important for developing effective monitoring and verification programs for the geological storage of CO<sub>2</sub>. Soil flux surveys are a well-established technique for characterising surface CO<sub>2</sub> emission sources from controlled release sites, CO<sub>2</sub>storage sites or natural CO<sub>2</sub>seeps. The performance of four interpolation methods; arithmetic mean (AM), two minimum variance unbiased estimators (MVUE), and a newly developed geostatistical cubic surface were evaluated using 21 soil flux surveys conducted over two controlled release experiments in 2012 and 2013, at the Ginninderra controlled release facility, Australia. Data was binned to approximate a regular sampling grid for improved performance of the whole-of-field AM and MVUE averaging techniques. The AM and MVUE methods were highly sensitive to deviations in the statistical distribution of the data, and performed inconsistently across the two experiments. These two methods proved ill-suited for application to CO<sub>2</sub> leak quantification due to their inflexible sampling and distribution requirements. The cubic technique provided the best net emission estimates across both experiments, and when applied at different bin sizes, estimating the true release rate to within 20% for the 2012 experiment and 45% below the release rate for the 2013 experiment. The cubic method is well-suited for CO<sub>2</sub> leak quantification because it is not limited by assumptions of the data’s spatial or statistical distribution. Net H<sub>2</sub>O emissions of 29 kg/d were observed coincident with the high CO<sub>2</sub> flux zones in the field. The interpolation methods were applied with similar results on soil flux surveys taken from a natural seepage site in Qinghai, China. Gravity currents appear to describe the observed soil flux and soil gas behavior at Ginninderra, i.e. the observed lateral migration of CO<sub>2</sub>in the subsurface. Subsurface migration was also strongly influenced by the relative depth of the groundwater. Thus the low water table and greater vadose zone in the 2013 experiment is suspected to facilitate greater lateral CO<sub>2</sub> migration and explain the poor closure of the CO<sub>2</sub> balance.
<b>Citation:</b> I.F. Schroder, P. Wilson, A.F. Feitz, J. Ennis-King, <i>Evaluating the Performance of Soil Flux Surveys and Inversion Methods for Quantification of CO2 Leakage</i>, Energy Procedia, Volume 114, 2017, Pages 3679-3694, ISSN 1876-6102, https://doi.org/10.1016/j.egypro.2017.03.1499.
Simple
Identification info
- Date (Publication)
- 2016-01-01T00:00:00
- Date (Revision)
- 2024-10-17T03:44:24
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/90000
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Elsevier Ltd
External Contact Author Schroder, I.
MEG Internal Contact Author Wilson, P.
External Contact Author Feitz, A.
MEG Internal Contact Author Ennis-King, J.
External Contact
- Name
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Energy Procedia
- Issue identification
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Volume 114, July 2017
- Page
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3679-3694
- Purpose
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Journal article communicating science conducted monitoring for CCS
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Resource provider Minerals, Energy and Groundwater Division
External Contact Point of contact Schroder, I.
MEG Internal Contact
- Topic category
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- Climatology, meteorology, atmosphere
Extent
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Keywords
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Carbon Dioxide - CO2
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- Keywords
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emissions
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- Keywords
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flux
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- Keywords
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monitoring
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- Keywords
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interpolation
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- Keywords
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quantification
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- Keywords
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controlled release
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
- Other constraints
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© 2017 The Author(s)
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
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Link to Journal
Link to Journal
- Distribution format
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Resource lineage
- Statement
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prepared for GHGT13 by Ivan Schroder (coauthor Andrew Feitz) using data acquired from the Ginninderra controlled release facility in partnership with the CO2CRC (and collaborators within).
- Hierarchy level
- Non geographic dataset
- Other
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External Publication
- Description
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Source data not available.
Metadata constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/2b50274f-30b0-0f74-e053-10a3070a242f
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Schroder, I.
MEG Internal Contact
Type of resource
- Resource scope
- Document
- Name
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Journal Articles
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/90000
- Date info (Revision)
- 2018-04-11T02:47:07
- Date info (Creation)
- 2016-02-09T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551