uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Identification of scale effects in dissolution trapping from the response of a push-pull experiment
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Geohydrologi)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Geohydrologi)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Geohydrology)
GHS, Institute of Environmental Assessment and Water Research (IDÆA), CSIC, Barcelona, Spain.
Show others and affiliations
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

During geological storage of carbon dioxide in deep saline aquifers part of the stored carbon dioxide dissolves inthe brine. This dissolution trapping is one of the key trapping mechanisms of CO2 and its understanding importantwhen making estimates of the performance of the storage. Dissolution occurs in the carbon dioxide and brineinterfaces, i.e. into brine in contact with the edges of the free phase carbon dioxide plume and into residual brineleft inside the plume after the push stage.In this modeling study the scale effect of dissolution trapping for CO2 in a deep saline aquifer and the use ofa push-pull CO2 injection-withdrawal test in quantifying field scale dissolution trapping, and in particular therelevant spatial and temporal scales of this process, is investigated. A push-pull test consists of two stages. First,a push stage during which supercritical carbon dioxide is injected into the formation; then, a pull stage duringwhich formation fluid is withdrawn. The second stage needs not be initiated immediately after the first, a waitingperiod of varying duration may be applied. Different withdrawal fluid compositions are obtained depending on theresting period between the injection and the withdrawal stages. The different waiting times between injection andwithdrawal of CO2 permits buoyancy to act for different periods and alter the carbon dioxide plume shape. Thedifferent plume shape can in turn give rise to different carbon dioxide-brine interfacial areas, where mixing anddissolution occurs.In comparing scenarios with different waiting time between injection and withdrawal this effect of mixing wasstudied. The injection-withdrawal was simulated into a sandstone target layer located at a depth of 1600 m, withproperties similar to the Heletz formation where an injection experiment is planned. Simulations of the push-pulltest were carried out with the TOUGH2/ECO2N simulator. The preliminary results indicate that a test sequencewith multiple push-pull stages in a series could be useful tool for analysis of the dissolution trapping.

Place, publisher, year, edition, pages
2012.
Series
Geophysical Research Abstracts, EGU General Assembly 2012, Vol. 14, EGU2012-7997
Keyword [en]
CO2, push-pull, scale effects
National Category
Earth and Related Environmental Sciences
Research subject
Hydrology
Identifiers
URN: urn:nbn:se:uu:diva-321497OAI: oai:DiVA.org:uu-321497DiVA: diva2:1093347
Conference
European Geosciences Union (EGU) General Assembly, 2012, 22-27 April, Vienna, Austria
Projects
MUSTANG
Funder
EU, FP7, Seventh Framework Programme, 227286
Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2017-05-05

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Rasmusson, KristinaNiemi, AuliFagerlund, FritjofTsang, Yvonne
By organisation
LUVAL
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 250 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf