Tab. 1 Mole % CO2 and 13C values of CO2 at baseline and at the final monitoring event for the eight observation wells

During CO2 storage operations in mature oilfields or saline aquifers it is desirable to trace the movement of injected CO2 for verification and safety purposes. We demonstrate the successful use of carbon isotope abundance ratios for tracing the movement of CO2 injected at the Cardium CO2 Storage Monitoring project in Alberta between 2005 and 2007. Injected CO2 had a d13C value of -4.6±1.1 per mil that was more than 10 per mil higher than the carbon isotope ratios of casing gas CO2 prior to CO2 injection with average d13C values ranging from -15.9 to -23.5 per mil. After commencement of CO2 injection, d13C values of casing gas CO2 increased in all observation wells towards those of the injected CO2 consistent with a two-source end-member mixing model. At four wells located in a NE-SW trend with respect to the injection wells, breakthrough of injected CO2 was registered chemically (>50 mol % CO2) and isotopically 1-6 months after commencement of CO2 injection resulting in cumulative CO2 fluxes exceeding 100000 m3 during the observation period. At four other wells, casing gas CO2 contents remained below 5 mol % resulting in low cumulative CO2 fluxes (<2000 m3) throughout the entire observation period, but carbon isotope ratios indicated contributions between <30 and 80% of injected CO2. Therefore, we conclude that monitoring the movement of CO2 in the injection reservoir with geochemical and isotopic techniques is an effective approach to determine plume expansion and to identify potential preferential flow paths provided that the isotopic composition of injected CO2 is constant and distinct from that of baseline CO2.

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Johnson, Leonard G, Mayer, Bernhard, Shevalier, Maurice, Nightingale, Philip D, Hutcheon, Ian, Johnson, Gareth (2015). Dataset: Tab. 1 Mole % CO2 and 13C values of CO2 at baseline and at the final monitoring event for the eight observation wells. https://doi.org/10.1594/PANGAEA.854845

DOI retrieved: 2015

Additional Info

Field Value
Imported on November 29, 2024
Last update November 29, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.854845
Author Johnson, Leonard G
Given Name Leonard G
Family Name Johnson
More Authors
Mayer, Bernhard
Shevalier, Maurice
Nightingale, Philip D
Hutcheon, Ian
Johnson, Gareth
Source Creation 2015
Publication Year 2015
Resource Type text/tab-separated-values - filename: JohnsonG_2011
Subject Areas
Name: Chemistry

Name: HumanDimensions

Related Identifiers
Title: Tracing the movement of CO2 injected into a mature oilfield using carbon isotope abundance ratios: The example of the Pembina Cardium CO2 Monitoring project
Identifier: https://doi.org/10.1016/j.ijggc.2011.02.003
Type: DOI
Relation: IsSupplementTo
Year: 2011
Source: International Journal of Greenhouse Gas Control
Authors: Johnson Gareth , Mayer Bernhard , Shevalier Maurice , Nightingale Michael , Hutcheon Ian .