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Lookup NU author(s): Dr Nikolaos Reppas, Dr Ben WetenhallORCiD, Dr Colin DavieORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2024 The AuthorsA prototype finite element double porous Thermo-Hydro-Mechanical (THM) model that considers elastoplastic and damage evolution effects, is used to investigate deformability, fluid flow and heat transfer during injection of carbon dioxide (CO2) injection. The primary objective is to explore the feasibility of injecting CO2 at temperatures lower than the surrounding formation, including subzero conditions. This is done to enhance the energy efficiency of the CO2 storage process by eliminating the need to pre-heat the CO2 prior to injection. The numerical analysis investigates the impact of internal wellbore temperatures and pressures on the surrounding rock, using Stainton Sandstone as the reference material. Various internal wellbore temperatures and pressures are simulated to represent different CO2 injection scenarios. The results suggest that injecting CO2 at lower temperatures than the wellhead is feasible. However, the long-term integrity and lifespan of the wellbore may require further investigation. This study provides a novel approach to enhancing energy efficiency in CO2 storage by exploring subzero injection, potentially reducing operational costs. Additionally, it identifies critical challenges regarding wellbore integrity, which warrant further research to ensure the safety and durability of the storage site.
Author(s): Reppas N, Wetenhall B, Gui Y, Davie CT
Publication type: Article
Publication status: Published
Journal: International Journal of Rock Mechanics and Mining Sciences
Year: 2024
Volume: 184
Print publication date: 01/12/2024
Online publication date: 13/11/2024
Acceptance date: 30/10/2024
Date deposited: 25/11/2024
ISSN (print): 1365-1609
ISSN (electronic): 1873-4545
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.ijrmms.2024.105954
DOI: 10.1016/j.ijrmms.2024.105954
Data Access Statement: Data will be made available on request.
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