DOI: 10.1002/2016GL070304
论文题名: Enhancing residual trapping of supercritical CO2 via cyclic injections
作者: Herring A.L. ; Andersson L. ; Wildenschild D.
刊名: Geophysical Research Letters
ISSN: 0094-8593
EISSN: 1944-8324
出版年: 2016
卷: 43, 期: 18 起始页码: 9677
结束页码: 9685
语种: 英语
英文关键词: capillary trapping
; CO2 sequestration
; cyclic injections
; multiphase flow
; residual trapping
; X-ray microtomography
Scopus关键词: Calcium
; Capillarity
; Hysteresis
; Multiphase flow
; Sandstone
; Tomography
; Capillary numbers
; Capillary trapping
; Drainage process
; Residual trapping
; Supercritical CO
; Synchrotron x rays
; Trapping theory
; X ray microtomography
; Carbon dioxide
英文摘要: We utilize synchrotron X-ray tomographic imaging to investigate the pore-scale characteristics and residual trapping of supercritical CO2 (scCO2) over the course of multiple drainage-imbibition (D-I) cycles in Bentheimer sandstone cores. Capillary pressure measurements are paired with X-ray image-derived saturation and connectivity metrics which describe the extent of drainage and subsequent residual (end of imbibition) scCO2 trapping. For the first D-I cycle, residual scCO2 trapping is suppressed due to high imbibition capillary number (Ca ≈ 10−6); however, residual scCO2 trapping dramatically increases for subsequent D-I cycles carried out at the same Ca value. This behavior is not predicted by conventional multiphase trapping theory. The magnitude of scCO2 trapping increase is hysteretic and depends on the relative extent of the sequential drainage processes. The hysteretic pore-scale behavior of the scCO2-brine-sandstone system observed in this study suggests that cyclic multiphase flow could potentially be used to increase scCO2 trapping for sequestration applications. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991238660&doi=10.1002%2f2016GL070304&partnerID=40&md5=9d390cfdeb306414ada75bef21bab84e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9556
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: School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Herring A.L.,Andersson L.,Wildenschild D.. Enhancing residual trapping of supercritical CO2 via cyclic injections[J]. Geophysical Research Letters,2016-01-01,43(18).