Mechanical effect of CO2 flooding of a sandstone specimen

Pierre Cerasi, Claus Kjøller, Lykourgos Sigalas, Hossain Bhuiyan, Peter Frykman

Research output: Contribution to journalConference article in journalpeer-review

8 Citations (Scopus)


An experimental campaign was carried out to investigate the applicability of the scratch test when studying the effect of CO2 exposure on the mechanical strength of a Berea outcrop sandstone specimen. A water-alternating-gas scheme was chosen for a CO2 flooding tests, using super-critical CO2 and a 10% KCl brine. Subsequent bulk X-ray diffraction analysis showed decrease in feldspar and increase in dolomite content, when comparing the flooded specimen with dry and brine-saturated specimens. However, these mineralogical differences may be due to local heterogeneities rather than due to the CO2 treatment itself. Scratch testing was used to assess unconfined compressive strength; no significant reduction in strength could be observed for the CO2-exposed specimen as compared to a specimen that was only saturated with 10% KCl brine.

Original languageEnglish
Pages (from-to)361-370
Number of pages10
JournalEnergy Procedia
Publication statusPublished - 1 Jan 2016
Event8th Trondheim Conference on CO2 Capture, Transport and Storage - Trondheim, Norway
Duration: 16 Jun 201518 Jun 2015
Conference number: 8


  • CO flooding
  • mineral dissolution
  • sandstone
  • scratch test
  • unconfined compressive strength
  • WAG
  • XRD

Programme Area

  • Programme Area 3: Energy Resources


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