Journal
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
Volume 114, Issue -, Pages 3832-3839Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2017.03.1515
Keywords
CCS; Monitoring; O isotopes; Natural analogues; Natural tracers
Funding
- EPSRC [EP/P026214/1] Funding Source: UKRI
- NERC [NE/G015163/1] Funding Source: UKRI
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Monitoring injected CO2 in CCS sites using oxygen isotopes of water has been demonstrated in field and laboratory experiments. Here, we examine natural CO2-rich springs in the Daylesford-Hepburn region, South East Australia, which show water O-18 depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed delta O-18 values, which can only be explained by isotopic exchange with CO2. The water delta O-18 shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 delta O-18 values exists. (c) 2017 The Authors. Published by Elsevier Ltd.
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