Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments

Detalhes bibliográficos
Autor(a) principal: Henry, Pierre
Data de Publicação: 1999
Outros Autores: Thomas, Michel, Clennell, M. Ben
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13419
Resumo: p. 1-18
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spelling Henry, PierreThomas, MichelClennell, M. BenHenry, PierreThomas, MichelClennell, M. Ben2013-10-31T17:58:26Z2013-10-31T17:58:26Z19990148-0227http://repositorio.ufba.br/ri/handle/ri/13419v. 104, n. 10p. 1-18A thermodynamicm odel for hydratef ormationi s usedt o computet he solubility of methanei n pore wateri n equilibriumw ith gaseousm ethaneo r methaneh ydrateo r both.F ree energyo f water in the hydratep hasea nd of methanei n gasb ubblesa re correctedto accountf or salt effects and capillary effects. Capillary effects increase the solubility of methane in fluid in equilibriumw ith eitherh ydrateo r gas.N aturals edimentsh avea broadd istributiono f pore sizes, and the effective pore size for capillary effects is a function of the fraction of the pore space filled by hydrateo r gas( phasef raction).T he equilibriumc onditionsfo r hydrate+water+gaesq uilibrium thusd ependo n hydratea ndg asp hasef raction.D ata acquiredo n Blake Ridged uringO ceanD rilling Program Leg 164 show that the base of the hydrate stability there is shifted by -2øC or more with respectt o the expectedt emperaturea nd this shift hasb eena ttributedt o capillarye ffects.W e show thatt hise xplanationw ouldr equirea very smalle ffectivep orer adius( 20 nm at 30 MPa). Mercury porosimetryin dicatest hat the percolationth resholdf or Blake Ridge silty claystoneis reacheda t 20-25% phasef ractiona ndc orrespondtso a 100 nm porer adius.H ydratea nd gasp hasef raction determinedw ith severali ndependenmt ethodsa re all lower thant hisp ercolationth reshold, implying that gas and hydrate fill pores larger than 100 nm. We conclude that additional inhibition factors other than pore size effects must be involved to explain the -2øC bottom-simulating reflector( BSR) shifta s an equilibriump henomenonC. apillarye ffectsm ay, however,e xplaino ther observationssu cha sl argev ariationso f the gash ydratec ontentin the sedimenwt ith lithologya nd porositya nd the distributiono f hydrateb etweeni nterstitialh ydratea nd segregatemd asses. Capillary effects should also oppose the migration of gas bubbles when gas phase fraction is less thant he percolationth resholda ndm akeu nnecessartyh e assumptioonf a hydrates eali mpermeable to fluids. Alternatively, we can go some way to explaining the offset position of the BSR by relaxingt he assumptionth at the systemi s in thermodynamice quilibrium.N ucleationk ineticso f hydratea nd/orf ree gasb ubblesm ay be inhibitedb y confinemenot f them ethane-bearinfglu id in smallp ores.E quilibrationm ay alsob e limitedb y possibler ateso f diffusionalt ransporot f gas, water,a nd salt componentos r be perturbedb y significantf lows of fluid or heatt hrought he sediments.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-08-06T17:13:19Z No. of bitstreams: 1 33333333333333.pdf: 2066014 bytes, checksum: 728c5c785b39e439c80eb1a48bd69246 (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-10-31T17:58:26Z (GMT) No. of bitstreams: 1 33333333333333.pdf: 2066014 bytes, checksum: 728c5c785b39e439c80eb1a48bd69246 (MD5)Made available in DSpace on 2013-10-31T17:58:26Z (GMT). No. of bitstreams: 1 33333333333333.pdf: 2066014 bytes, checksum: 728c5c785b39e439c80eb1a48bd69246 (MD5) Previous issue date: 1999SalvadorJournal of Geophysical Researchhttp://onlinelibrary-wiley-com.ez10.periodicos.capes.gov.br/doi/10.1029/1999JB900167/pdfreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAFormation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sedimentsJournal of Geophysical Researchinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleenginfo:eu-repo/semantics/openAccessORIGINAL33333333333333.pdf33333333333333.pdfapplication/pdf2066014https://repositorio.ufba.br/bitstream/ri/13419/1/33333333333333.pdf728c5c785b39e439c80eb1a48bd69246MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/13419/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXT33333333333333.pdf.txt33333333333333.pdf.txtExtracted texttext/plain89754https://repositorio.ufba.br/bitstream/ri/13419/3/33333333333333.pdf.txt215b4c25a0052c71bd9395315ebfc8acMD53ri/134192022-07-05 14:03:14.512oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:14Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
dc.title.alternative.pt_BR.fl_str_mv Journal of Geophysical Research
title Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
spellingShingle Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
Henry, Pierre
title_short Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
title_full Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
title_fullStr Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
title_full_unstemmed Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
title_sort Formation of natural gas hydrates in marine sediments 2. Thermodynamic calculations of stability conditions in porous sediments
author Henry, Pierre
author_facet Henry, Pierre
Thomas, Michel
Clennell, M. Ben
author_role author
author2 Thomas, Michel
Clennell, M. Ben
author2_role author
author
dc.contributor.author.fl_str_mv Henry, Pierre
Thomas, Michel
Clennell, M. Ben
Henry, Pierre
Thomas, Michel
Clennell, M. Ben
description p. 1-18
publishDate 1999
dc.date.issued.fl_str_mv 1999
dc.date.accessioned.fl_str_mv 2013-10-31T17:58:26Z
dc.date.available.fl_str_mv 2013-10-31T17:58:26Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/13419
dc.identifier.issn.none.fl_str_mv 0148-0227
dc.identifier.number.pt_BR.fl_str_mv v. 104, n. 10
identifier_str_mv 0148-0227
v. 104, n. 10
url http://repositorio.ufba.br/ri/handle/ri/13419
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Journal of Geophysical Research
publisher.none.fl_str_mv Journal of Geophysical Research
dc.source.pt_BR.fl_str_mv http://onlinelibrary-wiley-com.ez10.periodicos.capes.gov.br/doi/10.1029/1999JB900167/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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