Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025381 |
Wettability Effects on Primary Drainage Mechanisms and NAPL Distribution: A Pore-Scale Study | |
Molnar, Ian L.1; 39;Carroll, Denis M.2 | |
2020 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Scotland; Australia; USA |
英文摘要 | The pore-scale processes governing water drainage behavior in porous media have implications for geoscience multiphase scenarios including carbon capture and storage, contaminant site remediation, oil recovery, and vadose zone processes. However, few studies report directly observed pore-scale water drainage phenomena in 3-D soils. This knowledge gap limits our ability to verify assumptions underlying existing models and develop optimal solutions. This paper utilizes synchrotron X-ray microtomography to present an experimental pore-scale examination of nonaqueous phase liquid (NAPL)/water distribution along a primary drainage front as dense NAPL was injected upward into water wetting (WW) and intermediate wetting (IW) sand-packed columns. Pore-network structures were extracted from imaged data sets and mapped onto segmented NAPL/water data sets which allowed quantitative examinations of wettability impacts on (a) the extent to which NAPL fills individual pore bodies and (b) relationships between pore size and the phase occupying the pore, with both considered as a function of distance (and capillary pressure) relative to the NAPL front. These results revealed that several hypotheses treating IW sand similarly to WW sands are simplistic. IW systems exhibited a sequence of pore filling that deviated from traditional capillary pressure-based model predictions: NAPL invades smaller pores, while larger, adjacent pores are bypassed leaving multipore residual water ganglia. NAPL pore saturations were close to 1 and did not change with capillary pressure in IW systems. Overall, the results illustrate how a relatively small change in operative contact angle alters NAPL distribution during water drainage, with important implications for geoscience multiphase flow scenarios. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000520132500008 |
WOS关键词 | HETEROGENEOUS POROUS-MEDIA ; CONTACT-ANGLE MEASUREMENTS ; ORGANIC IMMISCIBLE-LIQUID ; X-RAY MICROTOMOGRAPHY ; MULTIPHASE FLOW ; MIXED-WETTABILITY ; CARBON-DIOXIDE ; OIL-RECOVERY ; HAINES JUMPS ; NETWORK |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280448 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Western Ontario, Dept Civil & Environm Engn, London, ON, Canada; 2.Univ Edinburgh, Grant Inst, Sch Geosci, Edinburgh, Midlothian, Scotland; 3.Univ New South Wales, Sch Civil & Environm Engn, Connected Water Initiat, Sydney, NSW, Australia; 4.Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA |
推荐引用方式 GB/T 7714 | Molnar, Ian L.,39;Carroll, Denis M.. Wettability Effects on Primary Drainage Mechanisms and NAPL Distribution: A Pore-Scale Study[J]. WATER RESOURCES RESEARCH,2020,56(1). |
APA | Molnar, Ian L.,&39;Carroll, Denis M..(2020).Wettability Effects on Primary Drainage Mechanisms and NAPL Distribution: A Pore-Scale Study.WATER RESOURCES RESEARCH,56(1). |
MLA | Molnar, Ian L.,et al."Wettability Effects on Primary Drainage Mechanisms and NAPL Distribution: A Pore-Scale Study".WATER RESOURCES RESEARCH 56.1(2020). |
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