Authors / CoAuthors
Haese, R.R. | LaForce, T | Boreham, C.J. | Ennis-King, J. | Freifeld, B.M.
Abstract
Residual CO2 trapping (Sgr-CO2) is a key mechanism for geological CO2 storage. The CO2CRC undertook a sequence of field tests with the aim to compare different ways of determining Sgr-CO2 including a dissolution test. Dissolution test results show an unexpectedly early breakthrough and low maximum CO2 concentrations in the back-produced water making the data inconclusive when using traditional data interpretation. Here, we consider two conditions to explain the observations: Firstly, residual CO2 is vertically unevenly distributed and, secondly, the fluid and residual CO2 are not in equilibrium. Furthermore, we infer localised flow channels have formed during the 3-month test period caused by advective flow of CO2-saturated, low pH water leading to transport-controlled mineral dissolution.
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nonGeographicDataset
eCat Id
74753
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Keywords
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- External Publication
- ( Theme )
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- marine
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2012-10-11T00:00:00
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geoscientificInformation
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