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Registro Completo |
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
12/02/2015 |
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Data da última atualização: |
12/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, M. L. B. da; SOARES, H. M.; FURIGO JÚNIOR, A.; SCHMIDELL, W.; CORSEIUL, H. X. |
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Afiliação: |
MARCIO LUIS BUSI DA SILVA, CNPSA; HUGO MOREIRA SOARES, UFSC; AGENOR FURIGO JÚNIOR, UFSC; WILLIBALDO SCHMIDELL, UFSC; HENRY XAVIER CORSEIUL, UFSC. |
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Título: |
Effects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Applied Biochemistry and Biotechnology, v. 174, n. 5, p. 1810-1821, 2014. |
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DOI: |
10.1007/s12010-014-1161-2 |
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Idioma: |
Português |
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Conteúdo: |
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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Palavras-Chave: |
Nitrate. |
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Thesagro: |
Biotecnologia; Impacto ambiental; Meio ambiente; Nitrato; Óleo; Resíduo químico. |
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Thesaurus Nal: |
Biodegradation; Chemical residues; Environmental impact; Oil fields. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/117935/1/final7466.pdf
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Marc: |
LEADER 02422naa a2200313 a 4500
001 2008529
005 2015-02-12
008 2014 bl uuuu u00u1 u #d
024 7 $a10.1007/s12010-014-1161-2$2DOI
100 1 $aSILVA, M. L. B. da
245 $aEffects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring.$h[electronic resource]
260 $c2014
520 $aColumn 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.
650 $aBiodegradation
650 $aChemical residues
650 $aEnvironmental impact
650 $aOil fields
650 $aBiotecnologia
650 $aImpacto ambiental
650 $aMeio ambiente
650 $aNitrato
650 $aÓleo
650 $aResíduo químico
653 $aNitrate
700 1 $aSOARES, H. M.
700 1 $aFURIGO JÚNIOR, A.
700 1 $aSCHMIDELL, W.
700 1 $aCORSEIUL, H. X.
773 $tApplied Biochemistry and Biotechnology$gv. 174, n. 5, p. 1810-1821, 2014.
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Embrapa Suínos e Aves (CNPSA) |
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