Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring.
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1008529 |
Resumo: | Column experiments were utilized to investigate the effects of nitrate injection on sulfate-reducing bacteria (SRB) inhibition and microbial enhanced oil recovery (MEOR). An indigenous microbial consortium collected from the produced water of a Brazilian offshore field was used as inoculum. The presence of 150 mg/L volatile fatty acids (VFA´s) in the injection water contributed to a high biological electron acceptors demand and the establishment of anaerobic sulfate-reducing conditions. Continuous injection of nitrate (up to 25 mg/L) for 90 days did not inhibit souring. Contrariwise, in nitrogen-limiting conditions, the addition of nitrate stimulated the proliferation of ?-Proteobacteria (including SRB) and the associated sulfide concentration. Denitrification-specific nirK or nirS genes were not detected. A sharp decrease in water interfacial tension (from 20.8 to 14.5 mN/m) observed concomitantly with nitrate consumption and increased oil recovery (4.3 % v/v) demonstrated the benefits of nitrate injection on MEOR. Overall, the results support the notion that the addition of nitrate, at this particular oil reservoir, can benefit MEOR by stimulating the proliferation of fortuitous biosurfactant-producing bacteria. Higher nitrate concentrations exceeding the stoichiometric volatile fatty acid (VFA) biodegradation demands and/or the use of alternative biogenic souring control strategies may be necessary to warrant effective SRB inhibition down gradient from the injection wells. |
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Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring.NitrateNitratoMeio ambienteImpacto ambientalResíduo químicoÓleoBiotecnologiaOil fieldsEnvironmental impactChemical residuesBiodegradationColumn experiments were utilized to investigate the effects of nitrate injection on sulfate-reducing bacteria (SRB) inhibition and microbial enhanced oil recovery (MEOR). An indigenous microbial consortium collected from the produced water of a Brazilian offshore field was used as inoculum. The presence of 150 mg/L volatile fatty acids (VFA´s) in the injection water contributed to a high biological electron acceptors demand and the establishment of anaerobic sulfate-reducing conditions. Continuous injection of nitrate (up to 25 mg/L) for 90 days did not inhibit souring. Contrariwise, in nitrogen-limiting conditions, the addition of nitrate stimulated the proliferation of ?-Proteobacteria (including SRB) and the associated sulfide concentration. Denitrification-specific nirK or nirS genes were not detected. A sharp decrease in water interfacial tension (from 20.8 to 14.5 mN/m) observed concomitantly with nitrate consumption and increased oil recovery (4.3 % v/v) demonstrated the benefits of nitrate injection on MEOR. Overall, the results support the notion that the addition of nitrate, at this particular oil reservoir, can benefit MEOR by stimulating the proliferation of fortuitous biosurfactant-producing bacteria. Higher nitrate concentrations exceeding the stoichiometric volatile fatty acid (VFA) biodegradation demands and/or the use of alternative biogenic souring control strategies may be necessary to warrant effective SRB inhibition down gradient from the injection wells.MARCIO LUIS BUSI DA SILVA, CNPSA; HUGO MOREIRA SOARES, UFSC; AGENOR FURIGO JÚNIOR, UFSC; WILLIBALDO SCHMIDELL, UFSC; HENRY XAVIER CORSEIUL, UFSC.SILVA, M. L. B. daSOARES, H. M.FURIGO JÚNIOR, A.SCHMIDELL, W.CORSEIUL, H. X.2015-02-12T11:11:11Z2015-02-12T11:11:11Z2015-02-1220142015-02-12T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleApplied Biochemistry and Biotechnology, v. 174, n. 5, p. 1810-1821, 2014.http://www.alice.cnptia.embrapa.br/alice/handle/doc/100852910.1007/s12010-014-1161-2porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T01:48:46Zoai:www.alice.cnptia.embrapa.br:doc/1008529Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T01:48:46falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T01:48:46Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
title |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
spellingShingle |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. SILVA, M. L. B. da Nitrate Nitrato Meio ambiente Impacto ambiental Resíduo químico Óleo Biotecnologia Oil fields Environmental impact Chemical residues Biodegradation |
title_short |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
title_full |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
title_fullStr |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
title_full_unstemmed |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
title_sort |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
author |
SILVA, M. L. B. da |
author_facet |
SILVA, M. L. B. da SOARES, H. M. FURIGO JÚNIOR, A. SCHMIDELL, W. CORSEIUL, H. X. |
author_role |
author |
author2 |
SOARES, H. M. FURIGO JÚNIOR, A. SCHMIDELL, W. CORSEIUL, H. X. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
MARCIO LUIS BUSI DA SILVA, CNPSA; HUGO MOREIRA SOARES, UFSC; AGENOR FURIGO JÚNIOR, UFSC; WILLIBALDO SCHMIDELL, UFSC; HENRY XAVIER CORSEIUL, UFSC. |
dc.contributor.author.fl_str_mv |
SILVA, M. L. B. da SOARES, H. M. FURIGO JÚNIOR, A. SCHMIDELL, W. CORSEIUL, H. X. |
dc.subject.por.fl_str_mv |
Nitrate Nitrato Meio ambiente Impacto ambiental Resíduo químico Óleo Biotecnologia Oil fields Environmental impact Chemical residues Biodegradation |
topic |
Nitrate Nitrato Meio ambiente Impacto ambiental Resíduo químico Óleo Biotecnologia Oil fields Environmental impact Chemical residues Biodegradation |
description |
Column experiments were utilized to investigate the effects of nitrate injection on sulfate-reducing bacteria (SRB) inhibition and microbial enhanced oil recovery (MEOR). An indigenous microbial consortium collected from the produced water of a Brazilian offshore field was used as inoculum. The presence of 150 mg/L volatile fatty acids (VFA´s) in the injection water contributed to a high biological electron acceptors demand and the establishment of anaerobic sulfate-reducing conditions. Continuous injection of nitrate (up to 25 mg/L) for 90 days did not inhibit souring. Contrariwise, in nitrogen-limiting conditions, the addition of nitrate stimulated the proliferation of ?-Proteobacteria (including SRB) and the associated sulfide concentration. Denitrification-specific nirK or nirS genes were not detected. A sharp decrease in water interfacial tension (from 20.8 to 14.5 mN/m) observed concomitantly with nitrate consumption and increased oil recovery (4.3 % v/v) demonstrated the benefits of nitrate injection on MEOR. Overall, the results support the notion that the addition of nitrate, at this particular oil reservoir, can benefit MEOR by stimulating the proliferation of fortuitous biosurfactant-producing bacteria. Higher nitrate concentrations exceeding the stoichiometric volatile fatty acid (VFA) biodegradation demands and/or the use of alternative biogenic souring control strategies may be necessary to warrant effective SRB inhibition down gradient from the injection wells. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 2015-02-12T11:11:11Z 2015-02-12T11:11:11Z 2015-02-12 2015-02-12T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Applied Biochemistry and Biotechnology, v. 174, n. 5, p. 1810-1821, 2014. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1008529 10.1007/s12010-014-1161-2 |
identifier_str_mv |
Applied Biochemistry and Biotechnology, v. 174, n. 5, p. 1810-1821, 2014. 10.1007/s12010-014-1161-2 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1008529 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503402453991424 |