The Impact of Water on CO2 Leak Rate Measurements for CCS Projects

6 Pages Posted: 14 Apr 2019 Last revised: 21 Jul 2019

See all articles by Matthew Myers

Matthew Myers

Government of the Commonwealth of Australia - CSIRO Energy

Jennifer J. Roberts

University of Strathclyde - Department of Civil and Environmental Engineering

Cameron White

Government of the Commonwealth of Australia - CSIRO Energy

Linda Stalker

Government of the Commonwealth of Australia - CSIRO Energy

Abstract

Chemical tracers are a promising technique to detect, attribute and quantify CO2 leakage from geological CO2 stores. Indeed, CO2 release experiments have found it difficult to ascertain the fate, or quantify the volume of CO2 without the application of tracers. However, a significant proportion of global CO2 storage capacity is located offshore, and the marine environment poses constraints that could limit the success of using tracers. These constraints include uncertainties in the behaviour of tracers in marine sediments and the water column and sampling challenges. To model some of these challenges, we used a benchtop experimental setup to explore how well methane, a common constituent of captured CO2 and of reservoir fluids, could aid the quantitation of CO2 leakage in aqueous environments. The experiment simulated gas leakage into sediments that mimic the seabed, and we measured the partitioning of co-released gases under different environmental conditions and injection rates. We find that the style of seepage and the fate of the CO2 are affected by the presence of a sand layer and the injection rate. This has implications for leak monitoring approaches, including how tracers may be used to quantify the leak rates and fate of CO2 in aqueous environments.

Keywords: Monitoring technologies and techniques, GHGT-14

Suggested Citation

Myers, Matthew and Roberts, Jennifer J. and White, Cameron and Stalker, Linda, The Impact of Water on CO2 Leak Rate Measurements for CCS Projects. 14th Greenhouse Gas Control Technologies Conference Melbourne 21-26 October 2018 (GHGT-14) . Available at SSRN: https://ssrn.com/abstract=3366400

Matthew Myers

Government of the Commonwealth of Australia - CSIRO Energy

10 Murray Dwyer Circuit
Mayfield West, New South Wales 2304
Australia

Jennifer J. Roberts (Contact Author)

University of Strathclyde - Department of Civil and Environmental Engineering ( email )

Glasgow
United Kingdom

Cameron White

Government of the Commonwealth of Australia - CSIRO Energy ( email )

10 Murray Dwyer Circuit
Mayfield West, New South Wales 2304
Australia

Linda Stalker

Government of the Commonwealth of Australia - CSIRO Energy

10 Murray Dwyer Circuit
Mayfield West, New South Wales 2304
Australia

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