Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems
Heterogeneity in mudstone/shale layers has significant effects on seal layer integrity. The presence of intralayer sandstone channels in a seal layer may allow the buoyant CO2 to escape from the reservoir, even if the globally averaged permeability of the seal layer seems low enough. On the other ha...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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The Mining and Materials Processing Institute of Japan
2020-12-01
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| Series: | Journal of MMIJ |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/journalofmmij/136/12/136_140/_pdf/-char/en |
| _version_ | 1797745805786873856 |
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| author | Yuki KANO Tsuneo ISHIDO Shinsuke NAKAO |
| author_facet | Yuki KANO Tsuneo ISHIDO Shinsuke NAKAO |
| author_sort | Yuki KANO |
| collection | DOAJ |
| description | Heterogeneity in mudstone/shale layers has significant effects on seal layer integrity. The presence of intralayer sandstone channels in a seal layer may allow the buoyant CO2 to escape from the reservoir, even if the globally averaged permeability of the seal layer seems low enough. On the other hand, multi-layered structures are known to work often as baffles for the upward migration of CO2 in formations. In this paper, we investigate the storage capacity of multilayer formations with discontinuous seals. Numerical simulations are carried out to study the effects of seal layer discontinuity on the long-term behaviour of CO2 injected into deep saline aquifers. To represent a seal layer composed of low permeability rocks intersected by sandstone channels, ‘MINC' doubleporosity model is adopted. Also conducted is sensitivity analysis to investigate the effects of key parameters such as capillary pressure, relative permeability, temperature, and the thickness of the formations. The results show that CO2 injection into a sufficiently deep multi-layered reservoir enables CO2 to be stored and trapped in and around the reservoir without reaching to a shallow aquifer, even though seal layers have discontinuities. The upward movement of CO2 is greatly affected by capillary pressure of sandstone channels in seal layers. The relative permeability and the temperature-dependent CO2 properties have a significant effect on the final plume spread and the amount of CO2 dissolved or fixed by residual gas trapping. |
| first_indexed | 2024-03-12T15:28:13Z |
| format | Article |
| id | doaj.art-099094c9c0ab4dd0a6157b991b51cf1a |
| institution | Directory Open Access Journal |
| issn | 1881-6118 1884-0450 |
| language | English |
| last_indexed | 2024-03-12T15:28:13Z |
| publishDate | 2020-12-01 |
| publisher | The Mining and Materials Processing Institute of Japan |
| record_format | Article |
| series | Journal of MMIJ |
| spelling | doaj.art-099094c9c0ab4dd0a6157b991b51cf1a2023-08-10T09:31:08ZengThe Mining and Materials Processing Institute of JapanJournal of MMIJ1881-61181884-04502020-12-011361214015010.2473/journalofmmij.136.140journalofmmijEffects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer SystemsYuki KANO0Tsuneo ISHIDO1Shinsuke NAKAO2National Institute of Advanced Industrial Science and TechnologyNational Institute of Advanced Industrial Science and TechnologyNational Institute of Advanced Industrial Science and TechnologyHeterogeneity in mudstone/shale layers has significant effects on seal layer integrity. The presence of intralayer sandstone channels in a seal layer may allow the buoyant CO2 to escape from the reservoir, even if the globally averaged permeability of the seal layer seems low enough. On the other hand, multi-layered structures are known to work often as baffles for the upward migration of CO2 in formations. In this paper, we investigate the storage capacity of multilayer formations with discontinuous seals. Numerical simulations are carried out to study the effects of seal layer discontinuity on the long-term behaviour of CO2 injected into deep saline aquifers. To represent a seal layer composed of low permeability rocks intersected by sandstone channels, ‘MINC' doubleporosity model is adopted. Also conducted is sensitivity analysis to investigate the effects of key parameters such as capillary pressure, relative permeability, temperature, and the thickness of the formations. The results show that CO2 injection into a sufficiently deep multi-layered reservoir enables CO2 to be stored and trapped in and around the reservoir without reaching to a shallow aquifer, even though seal layers have discontinuities. The upward movement of CO2 is greatly affected by capillary pressure of sandstone channels in seal layers. The relative permeability and the temperature-dependent CO2 properties have a significant effect on the final plume spread and the amount of CO2 dissolved or fixed by residual gas trapping.https://www.jstage.jst.go.jp/article/journalofmmij/136/12/136_140/_pdf/-char/engeological co2 storagedeep saline aquifermulti-layered structurelong-term behaviournumerical simulationdouble porosity model |
| spellingShingle | Yuki KANO Tsuneo ISHIDO Shinsuke NAKAO Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems Journal of MMIJ geological co2 storage deep saline aquifer multi-layered structure long-term behaviour numerical simulation double porosity model |
| title | Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems |
| title_full | Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems |
| title_fullStr | Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems |
| title_full_unstemmed | Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems |
| title_short | Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems |
| title_sort | effects of heterogeneous seal layer property on the long term behaviour of co2 injected into deep multilayer systems |
| topic | geological co2 storage deep saline aquifer multi-layered structure long-term behaviour numerical simulation double porosity model |
| url | https://www.jstage.jst.go.jp/article/journalofmmij/136/12/136_140/_pdf/-char/en |
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