气候变化领域集成服务门户(CCPortal): Gas migration and residual trapping in bimodal heterogeneous media during geological storage of CO2

CCPortal

DOI	10.1016/j.advwatres.2020.103608
	Gas migration and residual trapping in bimodal heterogeneous media during geological storage of CO2
	Yang Z.; Chen Y.-F.; Niemi A.
发表日期	2020
ISSN	0309-1708
卷号	142
英文摘要	This study investigates the effect of heterogeneity on CO2–brine two-phase flow behavior and capillary trapping at the field scale. A model based on macroscopic invasion percolation is developed to simulate CO2 migration and trapping in strongly heterogeneous systems with bimodal permeability distributions. Stochastic simulations are performed on heterogeneous permeability fields generated by considering both transition probability based lithofacies distribution and multi-Gaussian random fields, representative of characteristics often encountered in relevant sedimentary basins. The heterogeneity cases of different lithofacies proportions are designed such that they share the same ensemble mean of upscaled permeability over the simulation domain. We find that the CO2 spreading and trapping is strongly influenced by the heterogeneity. The ensemble means of sweep efficiency and domain-average CO2 saturation after primary drainage show a slight decrease with decreasing sandstone proportion p1 from 1.0 to 0.6 but a much steeper decline when p1 further decreases to 0.4. The upscaled two-phase flow properties such as the relative permeabilities are also influenced by the lithofacies proportion. Residual or capillary trapping and its uncertainty is shown to be dependent on the heterogeneity and the choice of trapping models. Our findings have broad implications within the context of CO2 sequestration, as the gas spreading and entrapment are the fundamental processes leading to long-term storage security. © 2020 Elsevier Ltd
关键词	Carbon dioxide Gaussian distribution Network security Solvents Stochastic models Stochastic systems Gaussian random fields Heterogeneous media Heterogeneous systems Invasion percolation Permeability distribution Relative permeability Stochastic simulations Transition probabilities Two phase flow carbon dioxide gas flow heterogeneity lithofacies permeability sandstone sedimentary basin two phase flow underground storage
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131773
推荐引用方式 GB/T 7714	Yang Z.,Chen Y.-F.,Niemi A.. Gas migration and residual trapping in bimodal heterogeneous media during geological storage of CO2[J]. Advances in Water Resources,2020,142.
APA	Yang Z.,Chen Y.-F.,&Niemi A..(2020).Gas migration and residual trapping in bimodal heterogeneous media during geological storage of CO2.,142.
MLA	Yang Z.,et al."Gas migration and residual trapping in bimodal heterogeneous media during geological storage of CO2".142(2020).