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DOI	10.1029/2019JB018857
	Effects of Fluid Rheology and Pore Connectivity on Rock Permeability Based on a Network Model
	Xiong F.; Sun W.; Ba J.; Carcione J.M.
发表日期	2020
ISSN	21699313
起始页码	no
卷号	125 期号:3
英文摘要	Permeability is an important rock property in exploration geophysics. Darcy's law assumes a steady-state regime and constant permeability. However, recent studies showed that the effects of fluid viscosity and pore geometry on permeability cannot be neglected. The periodic variation of pore fluid pressure gradient due to elastic wave propagation induces the oscillated fluid flow. We consider a Maxwell fluid in a 3-D pore network subject to harmonic oscillations. The network is based on the Voronoi method, which provides a realistic connectivity. The permeability of polyethylene oxide and cetylpyridinium chloride and sodium salicylate solution have been simulated. The results show that permeability is constant at frequencies less than several kHz and rapidly decreases to extremely low values as frequency tends to infinite. In addition, we find that fluid mainly flows in sparse-large pore networks at low frequencies and in dense-small pore networks at high frequencies. The Maxwell fluid shows significant permeability peaks related to the mean coordination number, indicating that there exists an optimal network connectivity at which fluid flow is maximum. These results have been central to understand how fluid flows in natural reservoir rocks. The permeability variations versus frequency, fluid rheology, and pore connectivity provide key information of reservoir fluid properties and pore network structure. The results indicate that it is questionable whether Darcy static permeability can be applied at high frequencies. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	frequency-dependent permeability; Maxwell fluid; random pore network; rocks
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187911
作者单位	School of Aerospace Engineering, Tsinghua University, Beijing, China; Zhou Pei-Yuan Center for Applied Mathematics, Tsinghua University, Beijing, China; School of Earth Sciences and Engineering, Hohai University, Nanjing, China; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Trieste, Italy
推荐引用方式 GB/T 7714	Xiong F.,Sun W.,Ba J.,et al. Effects of Fluid Rheology and Pore Connectivity on Rock Permeability Based on a Network Model[J],2020,125(3).
APA	Xiong F.,Sun W.,Ba J.,&Carcione J.M..(2020).Effects of Fluid Rheology and Pore Connectivity on Rock Permeability Based on a Network Model.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Xiong F.,et al."Effects of Fluid Rheology and Pore Connectivity on Rock Permeability Based on a Network Model".Journal of Geophysical Research: Solid Earth 125.3(2020).