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Article

A Pore Network Approach to Study Throat Size Effect on the Permeability of Reconstructed Porous Media

1
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
2
Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China
3
School of Earth Resources, China University of Geosciences, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Pezzinga
Water 2022, 14(1), 77; https://doi.org/10.3390/w14010077
Received: 17 November 2021 / Revised: 13 December 2021 / Accepted: 22 December 2021 / Published: 3 January 2022
(This article belongs to the Special Issue Flow and Transport in Fractured Porous Media)
Permeability is usually considered to be related to porosity. However, rocks with the same porosity may have different permeabilities in some cases, because of the variations in pore and throat size and pore space connectivity. It is vitally important to understand the effect of throat size on the transport property. In this work, five sets of regular pore network models and six core-based models are employed to study the effect of throat size on permeability. Four kinds of random distributions, i.e., uniform, normal, Weibull, and log normal, are utilized to generate random pore size. Pore coordination number is set to be two and six for the verification of the effect of connectivity on permeability. Then, single-phase flow simulation is conducted based on the constructed pore network models. The simulation results show that permeability decreases significantly when only one of the nine throats reduces to half size in terms of diameter. The influence of pore coordination number on permeability is not obvious compared to that of small throat size. This study indicates that small throats play an extremely important role in determining permeability. View Full-Text
Keywords: pore network model; permeability; pore size distribution; pore coordination number; pressure distribution pore network model; permeability; pore size distribution; pore coordination number; pressure distribution
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MDPI and ACS Style

Xu, K.; Wei, W.; Chen, Y.; Tian, H.; Xu, S.; Cai, J. A Pore Network Approach to Study Throat Size Effect on the Permeability of Reconstructed Porous Media. Water 2022, 14, 77. https://doi.org/10.3390/w14010077

AMA Style

Xu K, Wei W, Chen Y, Tian H, Xu S, Cai J. A Pore Network Approach to Study Throat Size Effect on the Permeability of Reconstructed Porous Media. Water. 2022; 14(1):77. https://doi.org/10.3390/w14010077

Chicago/Turabian Style

Xu, Kai, Wei Wei, Yin Chen, Haitao Tian, Sai Xu, and Jianchao Cai. 2022. "A Pore Network Approach to Study Throat Size Effect on the Permeability of Reconstructed Porous Media" Water 14, no. 1: 77. https://doi.org/10.3390/w14010077

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