The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia

Rūta Karolytė; Gareth Johnson; Sascha Serno; Stuart M. V. Gilfillan

doi:10.1016/j.egypro.2017.03.1515

The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia

Rūta Karolytė, Gareth Johnson, Sascha Serno, Stuart M. V. Gilfillan

Civil And Environmental Engineering

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Abstract

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 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.

Original language	English
Pages (from-to)	3832-3839
Number of pages	8
Journal	Energy Procedia
Volume	114
DOIs	https://doi.org/10.1016/j.egypro.2017.03.1515
Publication status	Published - 18 Aug 2017
Event	13th Conference on Greenhouse Gas Control Technologies (GHGT) - Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland Duration: 14 Nov 2016 → 18 Nov 2016 http://www.ghgt.info/ghgt-13

Keywords

water-rock reactions
CCS
natural tracers
monitoring
O isotopes
natural analogues

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10.1016/j.egypro.2017.03.1515Licence: CC BY-NC-ND 4.0

Karolyte-etal-EP2017-Influence-water-rock-reactions-O-isotope-exchange-CO2-water-stable-isotope-compositionFinal published version, 407 KBLicence: CC BY-NC-ND 4.0

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title = "The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia",

abstract = "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 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.",

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author = "Rūta Karolytė and Gareth Johnson and Sascha Serno and Gilfillan, {Stuart M. V.}",

year = "2017",

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doi = "10.1016/j.egypro.2017.03.1515",

language = "English",

volume = "114",

pages = "3832--3839",

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note = "13th Conference on Greenhouse Gas Control Technologies (GHGT) ; Conference date: 14-11-2016 Through 18-11-2016",

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TY - JOUR

T1 - The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia

AU - Karolytė, Rūta

AU - Johnson, Gareth

AU - Serno, Sascha

AU - Gilfillan, Stuart M. V.

PY - 2017/8/18

Y1 - 2017/8/18

N2 - 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 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.

AB - 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 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.

KW - water-rock reactions

KW - CCS

KW - natural tracers

KW - monitoring

KW - O isotopes

KW - natural analogues

U2 - 10.1016/j.egypro.2017.03.1515

DO - 10.1016/j.egypro.2017.03.1515

M3 - Article

SN - 1876-6102

VL - 114

SP - 3832

EP - 3839

JO - Energy Procedia

JF - Energy Procedia

T2 - 13th Conference on Greenhouse Gas Control Technologies (GHGT)

Y2 - 14 November 2016 through 18 November 2016

ER -

The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia

Abstract

Keywords

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