Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/223360 |
Resumo: | From our work, significant progress has been made in understanding the degradation of cement-casing systems. The CO2 degradation process was evaluated in specimens with a large interfacial defect, such as large annular spaces, voids and/or channels, which may be the result of a poor cementing job. From the experiments showing no interfacial defect, no signs of degradation were observed, while from experiments showing interfacial defect, both the cement and steel undergo significant degradation. In the well casing, the CO2-rich brine affects the steel phase, leaching Fe2+ ions into solution and promoting FeCO3 precipitation on the material surface, while on the cement sheath, two processes are occurring: (i) the portlandite dissolution and (ii) the cement carbonation process. Then, iron (Fe2+) starts to migrate into the cement structure, compromising the material’s self-healing and pore-blocking features, while calcium (Ca2+) starts to compose the corrosion film from the formation of mixed carbonates (FexCayCO3) so reducing the corrosion layer’s protection. Finally, both ions (Ca2+ and Fe2+) become so abundant in the material vicinity that they may form calcium carbonate (CaCO3) on the corrosion layer and iron carbonate (FeCO3) in the cement matrix. Thus, from our results, the degradation mechanisms of the cement-casing system in CO2-rich brine was revised. |
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Dalla Vecchia, FelipeSantos, Victor Hugo Jacks Mendes dosSchütz, Marta KerberPonzi, Gabriela Gonçalves DiasStepanha, Amanda Sofia de Guimarães eMalfatti, Célia de FragaCosta, Eleani Maria da2021-07-07T04:35:46Z20201750-5836http://hdl.handle.net/10183/223360001127824From our work, significant progress has been made in understanding the degradation of cement-casing systems. The CO2 degradation process was evaluated in specimens with a large interfacial defect, such as large annular spaces, voids and/or channels, which may be the result of a poor cementing job. From the experiments showing no interfacial defect, no signs of degradation were observed, while from experiments showing interfacial defect, both the cement and steel undergo significant degradation. In the well casing, the CO2-rich brine affects the steel phase, leaching Fe2+ ions into solution and promoting FeCO3 precipitation on the material surface, while on the cement sheath, two processes are occurring: (i) the portlandite dissolution and (ii) the cement carbonation process. Then, iron (Fe2+) starts to migrate into the cement structure, compromising the material’s self-healing and pore-blocking features, while calcium (Ca2+) starts to compose the corrosion film from the formation of mixed carbonates (FexCayCO3) so reducing the corrosion layer’s protection. Finally, both ions (Ca2+ and Fe2+) become so abundant in the material vicinity that they may form calcium carbonate (CaCO3) on the corrosion layer and iron carbonate (FeCO3) in the cement matrix. Thus, from our results, the degradation mechanisms of the cement-casing system in CO2-rich brine was revised.application/pdfporInternational Journal of Greenhouse Gas Control [recurso eletrônico]. Amsterdam. Vol. 98 (July 2020), Art. 103077, p. 1-14CimentoRevestimentoCorrosãoWellbore integrityCement-casing interfaceCO2 storageCement degradationCasing corrosionWellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basinEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001127824.pdf.txt001127824.pdf.txtExtracted Texttext/plain79657http://www.lume.ufrgs.br/bitstream/10183/223360/2/001127824.pdf.txt42237239e7b2e497a438264988326141MD52ORIGINAL001127824.pdfTexto completo (inglês)application/pdf2619521http://www.lume.ufrgs.br/bitstream/10183/223360/1/001127824.pdf6dece27a475d472a058b44fbd123889cMD5110183/2233602021-08-04 04:42:18.459688oai:www.lume.ufrgs.br:10183/223360Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-08-04T07:42:18Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
title |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
spellingShingle |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin Dalla Vecchia, Felipe Cimento Revestimento Corrosão Wellbore integrity Cement-casing interface CO2 storage Cement degradation Casing corrosion |
title_short |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
title_full |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
title_fullStr |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
title_full_unstemmed |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
title_sort |
Wellbore integrity in a saline aquifer : experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin |
author |
Dalla Vecchia, Felipe |
author_facet |
Dalla Vecchia, Felipe Santos, Victor Hugo Jacks Mendes dos Schütz, Marta Kerber Ponzi, Gabriela Gonçalves Dias Stepanha, Amanda Sofia de Guimarães e Malfatti, Célia de Fraga Costa, Eleani Maria da |
author_role |
author |
author2 |
Santos, Victor Hugo Jacks Mendes dos Schütz, Marta Kerber Ponzi, Gabriela Gonçalves Dias Stepanha, Amanda Sofia de Guimarães e Malfatti, Célia de Fraga Costa, Eleani Maria da |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Dalla Vecchia, Felipe Santos, Victor Hugo Jacks Mendes dos Schütz, Marta Kerber Ponzi, Gabriela Gonçalves Dias Stepanha, Amanda Sofia de Guimarães e Malfatti, Célia de Fraga Costa, Eleani Maria da |
dc.subject.por.fl_str_mv |
Cimento Revestimento Corrosão |
topic |
Cimento Revestimento Corrosão Wellbore integrity Cement-casing interface CO2 storage Cement degradation Casing corrosion |
dc.subject.eng.fl_str_mv |
Wellbore integrity Cement-casing interface CO2 storage Cement degradation Casing corrosion |
description |
From our work, significant progress has been made in understanding the degradation of cement-casing systems. The CO2 degradation process was evaluated in specimens with a large interfacial defect, such as large annular spaces, voids and/or channels, which may be the result of a poor cementing job. From the experiments showing no interfacial defect, no signs of degradation were observed, while from experiments showing interfacial defect, both the cement and steel undergo significant degradation. In the well casing, the CO2-rich brine affects the steel phase, leaching Fe2+ ions into solution and promoting FeCO3 precipitation on the material surface, while on the cement sheath, two processes are occurring: (i) the portlandite dissolution and (ii) the cement carbonation process. Then, iron (Fe2+) starts to migrate into the cement structure, compromising the material’s self-healing and pore-blocking features, while calcium (Ca2+) starts to compose the corrosion film from the formation of mixed carbonates (FexCayCO3) so reducing the corrosion layer’s protection. Finally, both ions (Ca2+ and Fe2+) become so abundant in the material vicinity that they may form calcium carbonate (CaCO3) on the corrosion layer and iron carbonate (FeCO3) in the cement matrix. Thus, from our results, the degradation mechanisms of the cement-casing system in CO2-rich brine was revised. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-07-07T04:35:46Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/223360 |
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1750-5836 |
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001127824 |
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1750-5836 001127824 |
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http://hdl.handle.net/10183/223360 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
International Journal of Greenhouse Gas Control [recurso eletrônico]. Amsterdam. Vol. 98 (July 2020), Art. 103077, p. 1-14 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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