The effect of hot water injection on sandstone permeability

Esther Rosenbrand, Christian Haugwitz, Peter Sally Munch Jacobsen, Claus Kjøller, Ida Lykke Fabricius

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Seasonal energy storage can be achieved by hot water injection in geothermal sandstone aquifers. We present an analysis of literature data in combination with new short-term flow through permeability experiments in order to address physical and physico-chemical mechanisms that can alter permeability when sandstones are heated from 20°C to 70–200°C. The pore surface area per unit pore volume was used to normalise permeability data, so that the temperature effect on samples with different pore size could be compared. In sandstones containing the clay mineral kaolinite, heating reduced permeability, suggesting that the observed permeability reduction was due to kaolinite mobilisation. The effect was partly reversible.
Original languageEnglish
JournalGeothermics
Volume50
Pages (from-to)155-166
ISSN0375-6505
DOIs
Publication statusPublished - 2014

Keywords

  • Sandstone
  • Permeability
  • Temperature dependency
  • Kaolinite mobilisation

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