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TitleThe biopolymer produced by Rhizobium viscosum CECT 908 is a promising agent for application in Microbial Enhanced Oil Recovery
Author(s)Couto, Márcia R.
Gudiña, Eduardo José
Ferreira, Débora
Teixeira, J. A.
Rodrigues, L. R.
KeywordsMicrobial Enhanced Oil Recovery
Polymer flooding
Xanthan gum
Rhizobium viscosum
Apparent viscosity
Issue date25-Mar-2019
JournalNew Biotechnology
CitationCouto, Márcia R.; Gudiña, Eduardo J.; Ferreira, Débora; Teixeira, José A.; Rodrigues, Lígia R., The biopolymer produced by Rhizobium viscosum CECT 908 is a promising agent for application in Microbial Enhanced Oil Recovery. New Biotechnology, 49, 144-150, 2019
Abstract(s)Polymer flooding is one of the most promising techniques used to increase the productivity of mature oil reservoirs. Polymers reduce the mobility ratio of the injected water relative to the crude oil, improving the displacement of the entrapped oil and consequently, increasing oil recovery. Biopolymers such as xanthan gum have emerged as environmentally friendly alternatives to the chemical polymers commonly employed by the oil industry. However, in order to seek more efficient biomolecules, alternative biopolymers must be studied. Here, the applicability of a biopolymer produced by Rhizobium viscosum CECT 908 in Microbial Enhanced Oil Recovery (MEOR) was evaluated. This biopolymer exhibited better rheological properties (including higher viscosity) when compared with xanthan gum. Its stability at high shear rates (up to 300 s-1), temperatures (up to 80?°C) and salinities (up to 200?g/L of NaCl) was also demonstrated. The biopolymer exhibited better performance than xanthan gum in oil recovery assays performed with a heavy crude oil, achieving 25.7?±?0.5% of additional recovery. Thus the R. viscosum CECT 908 biopolymer is a promising candidate for application in MEOR.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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