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Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms

In the development of tight gas reservoirs, gas flow through porous media usually takes place deep underground with multiple mechanisms, including gas slippage and stress sensitivity of permeability and porosity. However, little work has been done to simultaneously incorporate these mechanisms in th...

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Autores principales: Ren, Junjie, Zheng, Qiao, Guo, Ping, Zhao, Chunlan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7514616/
https://www.ncbi.nlm.nih.gov/pubmed/33266849
http://dx.doi.org/10.3390/e21020133
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author Ren, Junjie
Zheng, Qiao
Guo, Ping
Zhao, Chunlan
author_facet Ren, Junjie
Zheng, Qiao
Guo, Ping
Zhao, Chunlan
author_sort Ren, Junjie
collection PubMed
description In the development of tight gas reservoirs, gas flow through porous media usually takes place deep underground with multiple mechanisms, including gas slippage and stress sensitivity of permeability and porosity. However, little work has been done to simultaneously incorporate these mechanisms in the lattice Boltzmann model for simulating gas flow through porous media. This paper presents a lattice Boltzmann model for gas flow through porous media with a consideration of these effects. The apparent permeability and porosity are calculated based on the intrinsic permeability, intrinsic porosity, permeability modulus, porosity sensitivity exponent, and pressure. Gas flow in a two-dimensional channel filled with a homogeneous porous medium is simulated to validate the present model. Simulation results reveal that gas slippage can enhance the flow rate in tight porous media, while stress sensitivity of permeability and porosity reduces the flow rate. The simulation results of gas flow in a porous medium with different mineral components show that the gas slippage and stress sensitivity of permeability and porosity not only affect the global velocity magnitude, but also have an effect on the flow field. In addition, gas flow in a porous medium with fractures is also investigated. It is found that the fractures along the pressure-gradient direction significantly enhance the total flow rate, while the fractures perpendicular to the pressure-gradient direction have little effect on the global permeability of the porous medium. For the porous medium without fractures, the gas-slippage effect is a major influence factor on the global permeability, especially under low pressure; for the porous medium with fractures, the stress-sensitivity effect plays a more important role in gas flow.
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spelling pubmed-75146162020-11-09 Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms Ren, Junjie Zheng, Qiao Guo, Ping Zhao, Chunlan Entropy (Basel) Article In the development of tight gas reservoirs, gas flow through porous media usually takes place deep underground with multiple mechanisms, including gas slippage and stress sensitivity of permeability and porosity. However, little work has been done to simultaneously incorporate these mechanisms in the lattice Boltzmann model for simulating gas flow through porous media. This paper presents a lattice Boltzmann model for gas flow through porous media with a consideration of these effects. The apparent permeability and porosity are calculated based on the intrinsic permeability, intrinsic porosity, permeability modulus, porosity sensitivity exponent, and pressure. Gas flow in a two-dimensional channel filled with a homogeneous porous medium is simulated to validate the present model. Simulation results reveal that gas slippage can enhance the flow rate in tight porous media, while stress sensitivity of permeability and porosity reduces the flow rate. The simulation results of gas flow in a porous medium with different mineral components show that the gas slippage and stress sensitivity of permeability and porosity not only affect the global velocity magnitude, but also have an effect on the flow field. In addition, gas flow in a porous medium with fractures is also investigated. It is found that the fractures along the pressure-gradient direction significantly enhance the total flow rate, while the fractures perpendicular to the pressure-gradient direction have little effect on the global permeability of the porous medium. For the porous medium without fractures, the gas-slippage effect is a major influence factor on the global permeability, especially under low pressure; for the porous medium with fractures, the stress-sensitivity effect plays a more important role in gas flow. MDPI 2019-02-01 /pmc/articles/PMC7514616/ /pubmed/33266849 http://dx.doi.org/10.3390/e21020133 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ren, Junjie
Zheng, Qiao
Guo, Ping
Zhao, Chunlan
Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms
title Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms
title_full Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms
title_fullStr Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms
title_full_unstemmed Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms
title_short Lattice Boltzmann Model for Gas Flow through Tight Porous Media with Multiple Mechanisms
title_sort lattice boltzmann model for gas flow through tight porous media with multiple mechanisms
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7514616/
https://www.ncbi.nlm.nih.gov/pubmed/33266849
http://dx.doi.org/10.3390/e21020133
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