The influence of moisture on the permeability of crushed shale samples

Abstract Shale cuttings and cores recovered from the subsurface and stored for hours to decades tend to dry out and lose moisture and hydrocarbons, leading to an increase in the effective matrix permeability. Moisture loss in shale samples is a fundamental sample preservation problem which can be so...

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Autores principales:	Mercy Achang, Jack C. Pashin, Eliot A. Atekwana
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2019
Materias:	Crushed shale Matrix permeability Moisture equilibration Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/32a393239b5c4b8b9237dc5650663b9e
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spelling	oai:doaj.org-article:32a393239b5c4b8b9237dc5650663b9e2021-12-02T12:20:08ZThe influence of moisture on the permeability of crushed shale samples10.1007/s12182-019-0324-81672-51071995-8226https://doaj.org/article/32a393239b5c4b8b9237dc5650663b9e2019-06-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-0324-8https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Shale cuttings and cores recovered from the subsurface and stored for hours to decades tend to dry out and lose moisture and hydrocarbons, leading to an increase in the effective matrix permeability. Moisture loss in shale samples is a fundamental sample preservation problem which can be solved by applying a standard moisture equilibration procedure to restore lost moisture. Our aim was to investigate the relationship between permeability and variable moisture as-received, as-received moisture-equilibrated and saturated moisture-equilibrated samples. Samples were crushed to a series of particle sizes (0.6-2.0) mm and moisture equilibrated at 97% relative humidity. Results show that moisture equilibration in the samples was achieved after 72 h. The permeability of the saturated moisture-equilibrated and as-received moisture-equilibrated samples decreased exponentially with increase in moisture content. The high correlation coefficient between permeability and particle size (r = 0.96 and 0.97) for moisture-equilibrated samples compared to 0.76 for as-received samples indicates that moisture equilibration improves permeability measurements in crushed shale samples. Furthermore, permeability measurements are repeatable for moisture-equilibrated samples compared to samples that were not equilibrated (as-received). We conclude that moisture content affects permeability and moisture equilibration normalizes and improves the repeatability of permeability measurements in crushed shale.Mercy AchangJack C. PashinEliot A. AtekwanaKeAi Communications Co., Ltd.articleCrushed shaleMatrix permeabilityMoisture equilibrationScienceQPetrologyQE420-499ENPetroleum Science, Vol 16, Iss 3, Pp 492-501 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Crushed shale Matrix permeability Moisture equilibration Science Q Petrology QE420-499
spellingShingle	Crushed shale Matrix permeability Moisture equilibration Science Q Petrology QE420-499 Mercy Achang Jack C. Pashin Eliot A. Atekwana The influence of moisture on the permeability of crushed shale samples
description	Abstract Shale cuttings and cores recovered from the subsurface and stored for hours to decades tend to dry out and lose moisture and hydrocarbons, leading to an increase in the effective matrix permeability. Moisture loss in shale samples is a fundamental sample preservation problem which can be solved by applying a standard moisture equilibration procedure to restore lost moisture. Our aim was to investigate the relationship between permeability and variable moisture as-received, as-received moisture-equilibrated and saturated moisture-equilibrated samples. Samples were crushed to a series of particle sizes (0.6-2.0) mm and moisture equilibrated at 97% relative humidity. Results show that moisture equilibration in the samples was achieved after 72 h. The permeability of the saturated moisture-equilibrated and as-received moisture-equilibrated samples decreased exponentially with increase in moisture content. The high correlation coefficient between permeability and particle size (r = 0.96 and 0.97) for moisture-equilibrated samples compared to 0.76 for as-received samples indicates that moisture equilibration improves permeability measurements in crushed shale samples. Furthermore, permeability measurements are repeatable for moisture-equilibrated samples compared to samples that were not equilibrated (as-received). We conclude that moisture content affects permeability and moisture equilibration normalizes and improves the repeatability of permeability measurements in crushed shale.
format	article
author	Mercy Achang Jack C. Pashin Eliot A. Atekwana
author_facet	Mercy Achang Jack C. Pashin Eliot A. Atekwana
author_sort	Mercy Achang
title	The influence of moisture on the permeability of crushed shale samples
title_short	The influence of moisture on the permeability of crushed shale samples
title_full	The influence of moisture on the permeability of crushed shale samples
title_fullStr	The influence of moisture on the permeability of crushed shale samples
title_full_unstemmed	The influence of moisture on the permeability of crushed shale samples
title_sort	influence of moisture on the permeability of crushed shale samples
publisher	KeAi Communications Co., Ltd.
publishDate	2019
url	https://doaj.org/article/32a393239b5c4b8b9237dc5650663b9e
work_keys_str_mv	AT mercyachang theinfluenceofmoistureonthepermeabilityofcrushedshalesamples AT jackcpashin theinfluenceofmoistureonthepermeabilityofcrushedshalesamples AT eliotaatekwana theinfluenceofmoistureonthepermeabilityofcrushedshalesamples AT mercyachang influenceofmoistureonthepermeabilityofcrushedshalesamples AT jackcpashin influenceofmoistureonthepermeabilityofcrushedshalesamples AT eliotaatekwana influenceofmoistureonthepermeabilityofcrushedshalesamples
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The influence of moisture on the permeability of crushed shale samples

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