Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies
To evaluate the effectiveness of several mitigation strategies, we developed two-dimensional flow and transport simulations of carbon dioxide (CO2) leakage through the fractured caprock of a storage reservoir, over timescales of 2-10 years. The fractured system was modeled as a low-permeability faul...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/18484 |
| _version_ | 1848749756518498304 |
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| author | Vialle, Stephanie Druhan, J. Maher, K. |
| author_facet | Vialle, Stephanie Druhan, J. Maher, K. |
| author_sort | Vialle, Stephanie |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | To evaluate the effectiveness of several mitigation strategies, we developed two-dimensional flow and transport simulations of carbon dioxide (CO2) leakage through the fractured caprock of a storage reservoir, over timescales of 2-10 years. The fractured system was modeled as a low-permeability fault core surrounded by a fractured damage zone, as would be expected for a low-porosity caprock that underwent brittle deformation. To represent the damage zone, we introduced heterogeneities in the initial permeability field by using a grid-based continuum model where the upscaling relationship for permeability as a function of fracture aperture and density is given by an analytical expression. The first mitigation strategy, injection of a drying agent (dry CO2 here) below the damage zone, leads to precipitation of solids and local decreases in permeability that cause lateral migration of the leak and self-sealing of the fractured system. The higher the maximum value of the permeability in the damage zone, the less time required to reduce the leak rate. The second mitigation strategy evaluated controlled permeability reduction in the fractured zone by simulating an idealized emplaced sealant. Collectively, modeling results suggest that knowledge of the hydrodynamics of the leak is required to optimize the location of sealant applications within the fracture zone. |
| first_indexed | 2025-11-14T07:26:00Z |
| format | Journal Article |
| id | curtin-20.500.11937-18484 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:26:00Z |
| publishDate | 2016 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-184842017-09-13T13:44:34Z Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies Vialle, Stephanie Druhan, J. Maher, K. To evaluate the effectiveness of several mitigation strategies, we developed two-dimensional flow and transport simulations of carbon dioxide (CO2) leakage through the fractured caprock of a storage reservoir, over timescales of 2-10 years. The fractured system was modeled as a low-permeability fault core surrounded by a fractured damage zone, as would be expected for a low-porosity caprock that underwent brittle deformation. To represent the damage zone, we introduced heterogeneities in the initial permeability field by using a grid-based continuum model where the upscaling relationship for permeability as a function of fracture aperture and density is given by an analytical expression. The first mitigation strategy, injection of a drying agent (dry CO2 here) below the damage zone, leads to precipitation of solids and local decreases in permeability that cause lateral migration of the leak and self-sealing of the fractured system. The higher the maximum value of the permeability in the damage zone, the less time required to reduce the leak rate. The second mitigation strategy evaluated controlled permeability reduction in the fractured zone by simulating an idealized emplaced sealant. Collectively, modeling results suggest that knowledge of the hydrodynamics of the leak is required to optimize the location of sealant applications within the fracture zone. 2016 Journal Article http://hdl.handle.net/20.500.11937/18484 10.1016/j.ijggc.2015.10.007 restricted |
| spellingShingle | Vialle, Stephanie Druhan, J. Maher, K. Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies |
| title | Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies |
| title_full | Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies |
| title_fullStr | Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies |
| title_full_unstemmed | Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies |
| title_short | Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies |
| title_sort | multi-phase flow simulation of co2 leakage through a fractured caprock in response to mitigation strategies |
| url | http://hdl.handle.net/20.500.11937/18484 |