DOI: 10.1002/2016GL071298
论文题名: The scaling exponent of residual nonwetting phase cluster size distributions in porous media
作者: Iglauer S. ; Wülling W.
刊名: Geophysical Research Letters
ISSN: 0094-8425
EISSN: 1944-8156
出版年: 2016
卷: 43, 期: 21 起始页码: 11253
结束页码: 11260
语种: 英语
英文关键词: residual saturation
; residual trapping
; scaling exponent
Scopus关键词: Carbon dioxide
; Complex networks
; Fluid dynamics
; Hydrocarbons
; Porous materials
; Size distribution
; Solvents
; Uncertainty analysis
; Contaminant transport
; Disconnected clusters
; Dissolution trapping
; Hydrocarbon recovery
; Residual saturation
; Residual trapping
; Scaling exponent
; Subsurface fluid flow
; Flow of fluids
英文摘要: During an imbibition process in two-phase subsurface flow the imbibing phase can displace the nonwetting phase up to an endpoint at which a residual saturation is reached (which cannot be reduced further by additional wetting phase flow due to the complex pore network of the rock and associated strong capillary forces which trap the nonwetting phase). The residual nonwetting phase is split into many disconnected clusters of different sizes. This size distribution is of key importance, for instance, in the context of hydrocarbon recovery, contaminant transport, or CO2 geostorage; and it is well established that this size distribution follows a power law. However, there is significant uncertainty associated with the exact value of the distribution exponent τ, which mathematically describes the size distribution. To reduce this uncertainty and to better constrain τ, we analyzed a representative experimental data set with mathematically rigorous methods, and we demonstrate that τ is substantially smaller (≈1.1) than previously suggested. This raises increasing doubt that simple percolation models can accurately predict subsurface fluid flow behavior; and this has serious consequences for subsurface flow processes: hydrocarbon recovery is easier than predicted, but CO2 geostorage dissolution trapping capacities are significantly reduced and potential remobilization of residual CO2 is more likely than previously believed. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84996520772&doi=10.1002%2f2016GL071298&partnerID=40&md5=dc48b6fa3424d195cff7126327bae644
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9388
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Petroleum Engineering, Curtin University, Kensington, WA, Australia
Recommended Citation:
Iglauer S.,Wülling W.. The scaling exponent of residual nonwetting phase cluster size distributions in porous media[J]. Geophysical Research Letters,2016-01-01,43(21).