Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model

Abstract Different from the conventional gas reservoirs, gas transport in nanoporous shales is complicated due to multiple transport mechanisms and reservoir characteristics. In this work, we presented a unified apparent gas permeability model for real gas transport in organic and inorganic nanopore...

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Autores principales:	Qi Zhang, Wen-Dong Wang, Yilihamu Kade, Bo-Tao Wang, Lei Xiong
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2019
Materias:	Gas transport Apparent gas permeability model Gas adsorption Surface diffusion Stress dependence Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/821f984c5a1643c79534734f2006f2d3
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spelling	oai:doaj.org-article:821f984c5a1643c79534734f2006f2d32021-12-02T10:00:34ZAnalysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model10.1007/s12182-019-00358-41672-51071995-8226https://doaj.org/article/821f984c5a1643c79534734f2006f2d32019-09-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-00358-4https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Different from the conventional gas reservoirs, gas transport in nanoporous shales is complicated due to multiple transport mechanisms and reservoir characteristics. In this work, we presented a unified apparent gas permeability model for real gas transport in organic and inorganic nanopores, considering real gas effect, organic matter (OM) porosity, Knudsen diffusion, surface diffusion, and stress dependence. Meanwhile, the effects of monolayer and multilayer adsorption on gas transport are included. Then, we validated the model by experimental results. The influences of pore radius, pore pressure, OM porosity, temperature, and stress dependence on gas transport behavior and their contributions to the total apparent gas permeability (AGP) were analyzed. The results show that the adsorption effect causes Kn(OM) > Kn(IM) when the pore pressure is larger than 1 MPa and the pore radius is less than 100 nm. The ratio of the AGP over the intrinsic permeability decreases with an increase in pore radius or pore pressure. For nanopores with a radius of less than 10 nm, the effects of the OM porosity, surface diffusion coefficient, and temperature on gas transport cannot be negligible. Moreover, the surface diffusion almost dominates in nanopores with a radius less than 2 nm under high OM porosity conditions. For the small-radius and low-pressure conditions, gas transport is governed by the Knudsen diffusion in nanopores. This study focuses on revealing gas transport behavior in nanoporous shales.Qi ZhangWen-Dong WangYilihamu KadeBo-Tao WangLei XiongKeAi Communications Co., Ltd.articleGas transportApparent gas permeability modelGas adsorptionSurface diffusionStress dependenceScienceQPetrologyQE420-499ENPetroleum Science, Vol 17, Iss 1, Pp 168-181 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gas transport Apparent gas permeability model Gas adsorption Surface diffusion Stress dependence Science Q Petrology QE420-499
spellingShingle	Gas transport Apparent gas permeability model Gas adsorption Surface diffusion Stress dependence Science Q Petrology QE420-499 Qi Zhang Wen-Dong Wang Yilihamu Kade Bo-Tao Wang Lei Xiong Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
description	Abstract Different from the conventional gas reservoirs, gas transport in nanoporous shales is complicated due to multiple transport mechanisms and reservoir characteristics. In this work, we presented a unified apparent gas permeability model for real gas transport in organic and inorganic nanopores, considering real gas effect, organic matter (OM) porosity, Knudsen diffusion, surface diffusion, and stress dependence. Meanwhile, the effects of monolayer and multilayer adsorption on gas transport are included. Then, we validated the model by experimental results. The influences of pore radius, pore pressure, OM porosity, temperature, and stress dependence on gas transport behavior and their contributions to the total apparent gas permeability (AGP) were analyzed. The results show that the adsorption effect causes Kn(OM) > Kn(IM) when the pore pressure is larger than 1 MPa and the pore radius is less than 100 nm. The ratio of the AGP over the intrinsic permeability decreases with an increase in pore radius or pore pressure. For nanopores with a radius of less than 10 nm, the effects of the OM porosity, surface diffusion coefficient, and temperature on gas transport cannot be negligible. Moreover, the surface diffusion almost dominates in nanopores with a radius less than 2 nm under high OM porosity conditions. For the small-radius and low-pressure conditions, gas transport is governed by the Knudsen diffusion in nanopores. This study focuses on revealing gas transport behavior in nanoporous shales.
format	article
author	Qi Zhang Wen-Dong Wang Yilihamu Kade Bo-Tao Wang Lei Xiong
author_facet	Qi Zhang Wen-Dong Wang Yilihamu Kade Bo-Tao Wang Lei Xiong
author_sort	Qi Zhang
title	Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
title_short	Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
title_full	Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
title_fullStr	Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
title_full_unstemmed	Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
title_sort	analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model
publisher	KeAi Communications Co., Ltd.
publishDate	2019
url	https://doaj.org/article/821f984c5a1643c79534734f2006f2d3
work_keys_str_mv	AT qizhang analysisofgastransportbehaviorinorganicandinorganicnanoporesbasedonaunifiedapparentgaspermeabilitymodel AT wendongwang analysisofgastransportbehaviorinorganicandinorganicnanoporesbasedonaunifiedapparentgaspermeabilitymodel AT yilihamukade analysisofgastransportbehaviorinorganicandinorganicnanoporesbasedonaunifiedapparentgaspermeabilitymodel AT botaowang analysisofgastransportbehaviorinorganicandinorganicnanoporesbasedonaunifiedapparentgaspermeabilitymodel AT leixiong analysisofgastransportbehaviorinorganicandinorganicnanoporesbasedonaunifiedapparentgaspermeabilitymodel
_version_	1718397809265213440

Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model

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