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DOI | 10.1073/pnas.1803734115 |
Wettability in complex porous materials, the mixed-wet state, and its relationship to surface roughness | |
AlRatrout, Ahmed; Blunt, Martin J.; Bijeljic, Branko | |
2018-09-04 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:36页码:8901-8906 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | A quantitative in situ characterization of the impact of surface roughness on wettability in porous media is currently lacking. We use reservoir condition micrometer-resolution X-ray tomography combined with automated methods for the measurement of contact angle, interfacial curvature, and surface roughness to examine fluid/fluid and fluid/solid interfaces inside a porous material. We study oil and water in the pore space of limestone from a giant producing oilfield, acquiring millions of measurements of curvature and contact angle on three millimeter-sized samples. We identify a distinct wetting state with a broad distribution of contact angle at the submillimeter scale with a mix of water-wet and water-repellent regions. Importantly, this state allows both fluid phases to flow simultaneously over a wide range of saturation. We establish that, in media that are largely water wet, the interfacial curvature does not depend on solid surface roughness, quantified as the local deviation from a plane. However, where there has been a significant wettability alteration, rougher surfaces are associated with lower contact angles and higher interfacial curvature. The variation of both contact angle and interfacial curvature increases with the local degree of roughness. We hypothesize that this mixed wettability may also be seen in biological systems to facilitate the simultaneous flow of water and gases; furthermore, wettability-altering agents could be used in both geological systems and material science to design a mixed-wetting state with optimal process performance. |
英文关键词 | roughness complex porous media in situ reservoir conditions contact angle curvature |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000443555000044 |
WOS关键词 | IN-SITU CHARACTERIZATION ; X-RAY MICROTOMOGRAPHY ; MULTIPHASE FLOW ; CAPILLARY-PRESSURE ; CONTACT-ANGLE ; PORE ; CURVATURE ; MEDIA ; RESERVOIRS ; RECOVERY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/204979 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | Imperial Coll London, Dept Earth Sci & Engn, London SW7 2AZ, England |
推荐引用方式 GB/T 7714 | AlRatrout, Ahmed,Blunt, Martin J.,Bijeljic, Branko. Wettability in complex porous materials, the mixed-wet state, and its relationship to surface roughness[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(36):8901-8906. |
APA | AlRatrout, Ahmed,Blunt, Martin J.,&Bijeljic, Branko.(2018).Wettability in complex porous materials, the mixed-wet state, and its relationship to surface roughness.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(36),8901-8906. |
MLA | AlRatrout, Ahmed,et al."Wettability in complex porous materials, the mixed-wet state, and its relationship to surface roughness".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.36(2018):8901-8906. |
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