Lamy-Chappuis, B, Angus, DAC orcid.org/0000-0003-0734-7835, Fisher, Q orcid.org/0000-0002-2881-7018 et al. (2 more authors) (2014) Rapid porosity and permeability changes of calcareous sandstone due to CO₂-enriched brine injection. Geophysical Research Letters, 41 (2). pp. 399-406. ISSN 0094-8276
Abstract
Reservoir injectivity and storage capacity are the main constraints for geologic CO2 sequestration, subject to safety and economic considerations. Brine acidification following CO2 dissolution leads to fluid-rock interactions that alter porosity and permeability, thereby affecting reservoir storage capacity and injectivity. Thus, we determined how efficiently CO2-enriched brines could dissolve calcite in sandstone cores and how this affects the petrophysical properties. During computerized tomography monitored flow-through reactor experiments, calcite dissolved at a rate largely determined by the rate of acid supply, even at high flow velocities which would be typical near an injection well. The porosity increase was accompanied by a significant increase in rock permeability, larger than that predicted using classical porosity-permeability models. This chemically driven petrophysical change might be optimized using injection parameters to maximize injectivity and storage.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2014 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License. |
Keywords: | porosity; permeability; carbonates; CCS; dissolution |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Earth Surface Science Institute (ESSI) (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 30 Jan 2014 14:18 |
Last Modified: | 23 Jun 2023 21:36 |
Published Version: | http://dx.doi.org/10.1002/2013GL058534 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1002/2013GL058534 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:77398 |