Stepping into the same river twice: field evidence for the repeatability of a CO2 injection test

J. Ennis-King, T. LaForce, L. Paterson, J.R. Black, H.P. Vu, R.R. Haese, S. Serno, S. Gilfillan, G. Johnson, B. Freifeld, R. Singh

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A single well characterisation test was conducted at the CO2CRC Otway storage site in Victoria, Australia, in 2011 and repeated in 2014. The near-well permeability was found to have declined nearly 60% since the 2011 test, while the residual saturation inferred from a variety of techniques was lower in 2014. There was a significant change in water chemistry, suggesting an alteration of near-well reservoir properties. Possible reasons for these changes are explored, and the implications for other field tests are discussed.
Original languageEnglish
Pages (from-to)2760-2771
Number of pages12
JournalEnergy Procedia
Publication statusPublished - 19 Aug 2017


  • CO2 storage
  • residual saturation
  • field test
  • permeability alteration
  • geochemistry

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