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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/npg-2017-21
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
21 Jun 2017
Review status
This discussion paper is a preprint. It has been under review for the journal Nonlinear Processes in Geophysics (NPG). A final paper in NPG is not foreseen.
Study on connectivity mechanism and robustness of three-dimensional pore network of sandstone based on complex network theory
Guannan Liu1,2, Xiaopeng Pei3, Feng Gao1,2, Xin Liang1,2, Jianguo Wang1,2, and Dayu Ye3 1Mechanics and Civil engineering Institute, China University of Mining and Technology, Xuzhou city, Jiangsu province 221000, China
2State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou city, Jiangsu province 221000, China
3Chemical engineering Institute, China University of Mining and Technology, Xuzhou city, Jiangsu province 221000, China
Abstract. There are a large number of pores and throats inside the rock, with different magnitude and shape, whose connection is complex[1–3]. Based on the complex network theory, combined with X–ray CT scan and image processing technology, we used sandstone as an example to study the structural characteristics of rock network of different porosities. The experimental results show that the seepage network of sandstone is similar to the BA scale-free network in the structural characteristics. The average path length of sandstone generally increases with the increase of network magnitude. The average of number of edges of node plays a dominant role for the porosity of sandstone. It is inferred that in the large number of pores, few pores with a number of connections have an important role in the overall connectivity of the sandstone seepage network. At the same time, sandstone seepage network has better fault tolerance rate and robustness to external random attacks. The results of this paper may provide a new idea for the study of fluid storage and migration mechanisms in porous materials and the application of complex network theory in interdisciplinary fields.

Citation: Liu, G., Pei, X., Gao, F., Liang, X., Wang, J., and Ye, D.: Study on connectivity mechanism and robustness of three-dimensional pore network of sandstone based on complex network theory, Nonlin. Processes Geophys. Discuss., https://doi.org/10.5194/npg-2017-21, 2017.
Guannan Liu et al.
Guannan Liu et al.

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Short summary
The experimental results show that the seepage network of sandstone is similar to the BA scale-free network in the structural characteristics. The average path length of sandstone generally increases with the increase of network magnitude. The average of number of edges of node plays a dominant role for the porosity of sandstone. At the same time, sandstone seepage network has better fault tolerance rate and robustness to external random attacks.
The experimental results show that the seepage network of sandstone is similar to the BA...
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