Thermodiffusion in multicomponent n-alkane mixtures

Compositional grading within a mixture has a strong impact on the evaluation of the pre-exploitation distribution of hydrocarbons in underground layers and sediments. Thermodiffusion, which leads to a partial diffusive separation of species in a mixture due to the geothermal gradient, is thought to...

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Detalles Bibliográficos
Autor: Ortiz De Zárate Leira, José María
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/18352
Acceso en línea:https://hdl.handle.net/20.500.14352/18352
Access Level:acceso abierto
Palabra clave:536
Thermal-diffusion
Petroleum reservoirs
Molecular-diffusion
Soret coefficient
Ternary mixtures
Liquid-mixtures
Mass diffusion
Initial-state
High-pressure
Dodecane
Termodinámica
2213 Termodinámica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/18352
network_acronym_str ES
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spelling Thermodiffusion in multicomponent n-alkane mixturesOrtiz De Zárate Leira, José María536Thermal-diffusionPetroleum reservoirsMolecular-diffusionSoret coefficientTernary mixturesLiquid-mixturesMass diffusionInitial-stateHigh-pressureDodecaneTermodinámica2213 TermodinámicaCompositional grading within a mixture has a strong impact on the evaluation of the pre-exploitation distribution of hydrocarbons in underground layers and sediments. Thermodiffusion, which leads to a partial diffusive separation of species in a mixture due to the geothermal gradient, is thought to play an important role in determining the distribution of species in a reservoir. However, despite recent progress, thermodiffusion is still difficult to measure and model in multicomponent mixtures. In this work, we report on experimental investigations of the thermodiffusion of multicomponent n-alkane mixtures at pressure above 30 MPa. The experiments have been conducted in space onboard the Shi Jian 10 spacecraft so as to isolate the studied phenomena from convection. For the two exploitable cells, containing a ternary liquid mixture and a condensate gas, measurements have shown that the lightest and heaviest species had a tendency to migrate, relatively to the rest of the species, to the hot and cold region, respectively. These trends have been confirmed by molecular dynamics simulations. The measured condensate gas data have been used to quantify the influence of thermodiffusion on the initial fluid distribution of an idealised one dimension reservoir. The results obtained indicate that thermodiffusion tends to noticeably counteract the influence of gravitational segregation on the vertical distribution of species, which could result in an unstable fluid column. This confirms that, in oil and gas reservoirs, the availability of thermodiffusion data for multicomponent mixtures is crucial for a correct evaluation of the initial state fluid distribution.Nature publishing groupUniversidad Complutense de Madrid20172017-08-1120172017-08-11journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/18352reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/183522026-06-02T12:44:21Z
dc.title.none.fl_str_mv Thermodiffusion in multicomponent n-alkane mixtures
title Thermodiffusion in multicomponent n-alkane mixtures
spellingShingle Thermodiffusion in multicomponent n-alkane mixtures
Ortiz De Zárate Leira, José María
536
Thermal-diffusion
Petroleum reservoirs
Molecular-diffusion
Soret coefficient
Ternary mixtures
Liquid-mixtures
Mass diffusion
Initial-state
High-pressure
Dodecane
Termodinámica
2213 Termodinámica
title_short Thermodiffusion in multicomponent n-alkane mixtures
title_full Thermodiffusion in multicomponent n-alkane mixtures
title_fullStr Thermodiffusion in multicomponent n-alkane mixtures
title_full_unstemmed Thermodiffusion in multicomponent n-alkane mixtures
title_sort Thermodiffusion in multicomponent n-alkane mixtures
dc.creator.none.fl_str_mv Ortiz De Zárate Leira, José María
author Ortiz De Zárate Leira, José María
author_facet Ortiz De Zárate Leira, José María
author_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 536
Thermal-diffusion
Petroleum reservoirs
Molecular-diffusion
Soret coefficient
Ternary mixtures
Liquid-mixtures
Mass diffusion
Initial-state
High-pressure
Dodecane
Termodinámica
2213 Termodinámica
topic 536
Thermal-diffusion
Petroleum reservoirs
Molecular-diffusion
Soret coefficient
Ternary mixtures
Liquid-mixtures
Mass diffusion
Initial-state
High-pressure
Dodecane
Termodinámica
2213 Termodinámica
description Compositional grading within a mixture has a strong impact on the evaluation of the pre-exploitation distribution of hydrocarbons in underground layers and sediments. Thermodiffusion, which leads to a partial diffusive separation of species in a mixture due to the geothermal gradient, is thought to play an important role in determining the distribution of species in a reservoir. However, despite recent progress, thermodiffusion is still difficult to measure and model in multicomponent mixtures. In this work, we report on experimental investigations of the thermodiffusion of multicomponent n-alkane mixtures at pressure above 30 MPa. The experiments have been conducted in space onboard the Shi Jian 10 spacecraft so as to isolate the studied phenomena from convection. For the two exploitable cells, containing a ternary liquid mixture and a condensate gas, measurements have shown that the lightest and heaviest species had a tendency to migrate, relatively to the rest of the species, to the hot and cold region, respectively. These trends have been confirmed by molecular dynamics simulations. The measured condensate gas data have been used to quantify the influence of thermodiffusion on the initial fluid distribution of an idealised one dimension reservoir. The results obtained indicate that thermodiffusion tends to noticeably counteract the influence of gravitational segregation on the vertical distribution of species, which could result in an unstable fluid column. This confirms that, in oil and gas reservoirs, the availability of thermodiffusion data for multicomponent mixtures is crucial for a correct evaluation of the initial state fluid distribution.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-08-11
2017
2017-08-11
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/18352
url https://hdl.handle.net/20.500.14352/18352
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Nature publishing group
publisher.none.fl_str_mv Nature publishing group
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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