Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment

Nature gas hydrates (NGHs) are considered as an ideal substitute for traditional fossil fuel. The evaluation of the physical properties of hydrate-bearing sediment (HBS) is important to develop reasonable exploitation strategies and clarify the corresponding main controlling factors. In this study,...

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Autores principales:	Peng Wu, Shenghua Yang, Xiangge Song, Xiang Sun, Yanghui Li
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Hydrate Physical characteristic Grain size Pore scale Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/0d24261b26ab4cc9820835baac69eb4e
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spelling	oai:doaj.org-article:0d24261b26ab4cc9820835baac69eb4e2021-11-28T04:33:51ZInfluence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment2352-484710.1016/j.egyr.2021.07.014https://doaj.org/article/0d24261b26ab4cc9820835baac69eb4e2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721004789https://doaj.org/toc/2352-4847Nature gas hydrates (NGHs) are considered as an ideal substitute for traditional fossil fuel. The evaluation of the physical properties of hydrate-bearing sediment (HBS) is important to develop reasonable exploitation strategies and clarify the corresponding main controlling factors. In this study, to determine the influence of grain size distribution on the physical properties of HBSs, 24 hydrate-bearing models were reconstructed based on a novel pore-scale 3D morphological modeling algorithm. A series of pore system evaluations and permeability simulations were carried out by pore network modeling (PNM). Moreover, thermal and electrical simulations were carried out using the finite volume method (FVM). The results are as follows: (1) The smaller the grain size is, the smaller the radius of the pores and throats of HBSs will be, which makes it easier for the connectivity between pores and throats to deteriorate as the hydrate saturation increases. (2) With increasing hydrate saturation, the permeability of HBSs gradually decreases. According to the decline rate, it can be divided into two stages: in the first stage, it will decrease sharply, while in the second stage, it will decrease slowly. In general, the smaller the grain size is, the lower the permeability of HBSs will be. (3) The apparent thermal conductivity of HBSs will increase as the hydrate saturation increases. The smaller the grain size is, the higher the apparent thermal conductivity will be. (4) The smaller the grain size is, the lower the apparent electrical conductivity and the higher the resistivity index under the same hydrate saturation will be.Peng WuShenghua YangXiangge SongXiang SunYanghui LiElsevierarticleHydratePhysical characteristicGrain sizePore scaleElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 8187-8197 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Hydrate Physical characteristic Grain size Pore scale Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Hydrate Physical characteristic Grain size Pore scale Electrical engineering. Electronics. Nuclear engineering TK1-9971 Peng Wu Shenghua Yang Xiangge Song Xiang Sun Yanghui Li Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
description	Nature gas hydrates (NGHs) are considered as an ideal substitute for traditional fossil fuel. The evaluation of the physical properties of hydrate-bearing sediment (HBS) is important to develop reasonable exploitation strategies and clarify the corresponding main controlling factors. In this study, to determine the influence of grain size distribution on the physical properties of HBSs, 24 hydrate-bearing models were reconstructed based on a novel pore-scale 3D morphological modeling algorithm. A series of pore system evaluations and permeability simulations were carried out by pore network modeling (PNM). Moreover, thermal and electrical simulations were carried out using the finite volume method (FVM). The results are as follows: (1) The smaller the grain size is, the smaller the radius of the pores and throats of HBSs will be, which makes it easier for the connectivity between pores and throats to deteriorate as the hydrate saturation increases. (2) With increasing hydrate saturation, the permeability of HBSs gradually decreases. According to the decline rate, it can be divided into two stages: in the first stage, it will decrease sharply, while in the second stage, it will decrease slowly. In general, the smaller the grain size is, the lower the permeability of HBSs will be. (3) The apparent thermal conductivity of HBSs will increase as the hydrate saturation increases. The smaller the grain size is, the higher the apparent thermal conductivity will be. (4) The smaller the grain size is, the lower the apparent electrical conductivity and the higher the resistivity index under the same hydrate saturation will be.
format	article
author	Peng Wu Shenghua Yang Xiangge Song Xiang Sun Yanghui Li
author_facet	Peng Wu Shenghua Yang Xiangge Song Xiang Sun Yanghui Li
author_sort	Peng Wu
title	Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
title_short	Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
title_full	Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
title_fullStr	Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
title_full_unstemmed	Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
title_sort	influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/0d24261b26ab4cc9820835baac69eb4e
work_keys_str_mv	AT pengwu influenceofgrainsizedistributiononthephysicalcharacteristicsofcementinghydratebearingsediment AT shenghuayang influenceofgrainsizedistributiononthephysicalcharacteristicsofcementinghydratebearingsediment AT xianggesong influenceofgrainsizedistributiononthephysicalcharacteristicsofcementinghydratebearingsediment AT xiangsun influenceofgrainsizedistributiononthephysicalcharacteristicsofcementinghydratebearingsediment AT yanghuili influenceofgrainsizedistributiononthephysicalcharacteristicsofcementinghydratebearingsediment
_version_	1718408301065011200

Influence of grain size distribution on the physical characteristics of cementing hydrate-bearing sediment

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