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Residual trapping o...
Residual trapping of carbon dioxide during geological storage : insight gained through a pore-network modeling approach
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- Rasmusson, Kristina (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Rasmusson, Maria (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära,Geohydrology
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- Tsang, Yvonne (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära,Lawrence Berkeley National Laboratory, Berkeley California, USA
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- Benson, Sally (författare)
- Stanford University, USA
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- Hingerl, Ferdinand (författare)
- StreamSim Technologies Inc, Canada
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- Fagerlund, Fritjof, 1974- (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära,Geohydrology
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- Niemi, Auli (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära,Geohydrology
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(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- Engelska.
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Ingår i: International Journal of Greenhouse Gas Control. - : Elsevier BV. - 1750-5836 .- 1878-0148. ; 74, s. 62-78
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- To reduce emissions of the greenhouse gas CO2 to the atmosphere, sequestration in deep saline aquifers is a viable strategy. Residual trapping is a key containment process important to the success of CO2 storage operations. While residual trapping affects CO2 migration over large scales, it is inherently a pore-scale process. Pore-network models (PNMs), capturing such processes, are useful for our understanding of residual trapping, and for upscaling trapping parameters for larger scale models. A PNM for simulation of quasi-static two-phase flow; CO2 intrusion (drainage) followed by water flooding (imbibition) was developed. It accounts for pore-scale displacement mechanisms, and was used to investigate residual CO2 trapping. The sensitivity of the residual CO2 saturation to several parameters was studied, to validate a trapping behavior in agreement with earlier studies. Then the PNM was calibrated to core sample data and used to simulate drainage-imbibition scenarios with different turning point saturations. From these the initial-residual saturation curves of CO2 in Heletz sandstone were estimated, essential for future macroscopic-scale simulations. Further, the occurrence of different pore-scale mechanisms were quantified and the size distribution of the residual clusters was shown to exhibit a bimodal appearance. The findings improve the understanding of residual trapping in Heletz sandstone.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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