Geomechanical integrity and non-isothermal effect in CO2 storage
Geomechanical integrity and non-isothermal effect in CO2 storage
Carbon capture and storage (CCS) is an important component among several initiatives to reduce greenhouse gases emitted to the atmosphere. In Norway, a joint venture is underway between Equinor, Shell and Total to implement the world's first complete value chain (capture, shipping, transport and storage) offshore CCS demonstration project, in which the CO2 can come from many different sources. Here we investigate the thermal effect on a future candidate site for CO2 storage, Smeaheia, using numerical modelling. To do this, we compare results from hydro-mechanical (HM-model) and thermo-hydro-mechanical (THM model) CO2 injection simulations, including the equation of state for the fluids. The injected CO2 is colder than the storage reservoir, and as the CO2 migrates, it cools down the surrounding formations, mainly the reservoir and the overlying caprock. Increased pore pressure due to injection dissipates fast in the high-permeable reservoir in Smeaheia. However, in the caprock, the cooling causes the fluid to contract and the low-permeable caprock creates undrained conditions for the formation water which results in significant reduction in pore pressure. We observe that the thermal effect contributes to destabilizing the reservoir and stabilizing the caprock, which is seemingly fortuitous, but also potentially an unpredictable situation because of the large stress transients and gradients in a small area where the stability can be sensitive to small weaknesses and heterogeneities.
Social Science Research Network
Bjørnarå, Tore I.
534f474a-cb4f-44e5-a38f-2d3cc3b5e81c
Park, Joonsang
3f693ae1-b594-4e8f-ae76-96a4d7af6515
Marín-Moreno, Héctor
e466cafd-bd5c-47a1-8522-e6938e7086a4
Bjørnarå, Tore I.
534f474a-cb4f-44e5-a38f-2d3cc3b5e81c
Park, Joonsang
3f693ae1-b594-4e8f-ae76-96a4d7af6515
Marín-Moreno, Héctor
e466cafd-bd5c-47a1-8522-e6938e7086a4
Bjørnarå, Tore I., Park, Joonsang and Marín-Moreno, Héctor
(2021)
Geomechanical integrity and non-isothermal effect in CO2 storage.
In Proceedings of the 15th Greenhouse Gas Control Technologies Conference (GHGT-15).
Social Science Research Network.
11 pp
.
(doi:10.2139/ssrn.3811357).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Carbon capture and storage (CCS) is an important component among several initiatives to reduce greenhouse gases emitted to the atmosphere. In Norway, a joint venture is underway between Equinor, Shell and Total to implement the world's first complete value chain (capture, shipping, transport and storage) offshore CCS demonstration project, in which the CO2 can come from many different sources. Here we investigate the thermal effect on a future candidate site for CO2 storage, Smeaheia, using numerical modelling. To do this, we compare results from hydro-mechanical (HM-model) and thermo-hydro-mechanical (THM model) CO2 injection simulations, including the equation of state for the fluids. The injected CO2 is colder than the storage reservoir, and as the CO2 migrates, it cools down the surrounding formations, mainly the reservoir and the overlying caprock. Increased pore pressure due to injection dissipates fast in the high-permeable reservoir in Smeaheia. However, in the caprock, the cooling causes the fluid to contract and the low-permeable caprock creates undrained conditions for the formation water which results in significant reduction in pore pressure. We observe that the thermal effect contributes to destabilizing the reservoir and stabilizing the caprock, which is seemingly fortuitous, but also potentially an unpredictable situation because of the large stress transients and gradients in a small area where the stability can be sensitive to small weaknesses and heterogeneities.
This record has no associated files available for download.
More information
e-pub ahead of print date: 2 April 2021
Venue - Dates:
15th Greenhouse Gas Control Technologies Conference (GHGT-15), , Abu Dhabi, United Arab Emirates, 2021-03-15 - 2021-03-18
Identifiers
Local EPrints ID: 483978
URI: http://eprints.soton.ac.uk/id/eprint/483978
PURE UUID: c4e83d75-c121-4be2-8906-f949e0bfb47d
Catalogue record
Date deposited: 08 Nov 2023 18:07
Last modified: 18 Mar 2024 04:11
Export record
Altmetrics
Contributors
Author:
Tore I. Bjørnarå
Author:
Joonsang Park
Author:
Héctor Marín-Moreno
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics