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Proceedings Paper

Neutron radiography study of water spontaneous imbibition in unsaturated sandstone
Author(s): Yixin Zhao; Zhihu Li; Yang Wu; Yile Zhao; Bin Tang; Hang Li; Peng Li; Yu Song
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Paper Abstract

The spontaneous imbibition of water in variable saturated porous media is a common phenomenon in various geotechnical applications. The relationship between the traveled distance of wetting front and imbibition time can be characterized by the sorptivity however, few researches have been carried out to investigate the sorptivity model in the spontaneous imbibition process. In this paper, based on the fractal dimension of pore mass and the formula of total flow rate of cross section of medium without considering gravity, a model was derived to calculate the sorptivity of sandstone. To validate the model, quantitative data on the imbibition of water in the matrix of unsaturated sandstone were obtained by neutron radiography a powerful imaging tool to research the dynamic water imbibition behaviour in rocks. The consequences display that there is the obvious linear relation between the traveled distance of wetting front and the square root of imbibition time in four monitoring lines and the linear coefficient is regarded as the experimental value of the sorptivity. Compared the mean of the experimental value, the theoretical value computed by the sorptivity model can reflect the experimental value to a large extent and, thus the sorptivity model can be applied to estimate the sorptivity of sandstone in the process of spontaneous imbibition.

Paper Details

Date Published: 10 May 2019
PDF: 10 pages
Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 110681Z (10 May 2019); doi: 10.1117/12.2524647
Show Author Affiliations
Yixin Zhao, China Univ. of Mining & Technology (Beijing) (China)
Zhihu Li, China Univ. of Mining & Technology (Beijing) (China)
Yang Wu, China Univ. of Mining & Technology (Beijing) (China)
Yile Zhao, China Univ. of Mining & Technology (Beijing) (China)
Bin Tang, Institute of Nuclear Physics and Chemistry (China)
Hang Li, Institute of Nuclear Physics and Chemistry (China)
Peng Li, China Univ. of Mining & Technology (Beijing) (China)
Yu Song, China Univ. of Mining & Technology (Beijing) (China)


Published in SPIE Proceedings Vol. 11068:
Second Symposium on Novel Technology of X-Ray Imaging
Yangchao Tian; Tiqiao Xiao; Peng Liu, Editor(s)

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