NDLI: Characterisation of culture-independent and -dependent microbial communities in a high-temperature offshore chalk petroleum reservoir.

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Characterisation of culture-independent and -dependent microbial communities in a high-temperature offshore chalk petroleum reservoir.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kaster, Krista M. Bonaunet, Kristin Berland, Harald Kjeilen-Eilertsen, Grethe Brakstad, Odd Gunnar
Spatial Coverage	North Sea
Description	Country affiliation: Norway Author Affiliation: Kaster KM ( International Research Institute of Stavanger, Mekjarvik 12, 4070 Randaberg, Norway. krista.kaster@iris.no)
Abstract	Recent studies have indicated that oil reservoirs harbour diverse microbial communities. Culture-dependent and culture-independent methods were used to evaluate the microbial diversity in produced water samples of the Ekofisk oil field, a high temperature, and fractured chalk reservoir in the North Sea. DGGE analyses of 16S rRNA gene fragments were used to assess the microbial diversity of both archaeal and bacterial communities in produced water samples and enrichment cultures from 4 different wells (B-08, X-08, X-18 and X-25). Low diversity communities were found when 16S rDNA libraries of bacterial and archaeal assemblages were generated from total community DNA obtained from produced water samples and enrichment cultures. Sequence analysis of the clones indicated close matches to microbes associated with high-temperature oil reservoirs or other similar environments. Sequences were found to be similar to members of the genera Thermotoga, Caminicella, Thermoanaerobacter, Archaeoglobus, Thermococcus, and Methanobulbus. Enrichment cultures obtained from the produced water samples were dominated by sheathed rods. Sequence analyses of the cultures indicated predominance of the genera Petrotoga, Arcobacter, Archaeoglobus and Thermococcus. The communities of both produced water and enrichment cultures appeared to be dominated by thermophilic fermenters capable of reducing sulphur compounds. These results suggest that the biochemical processes in the Ekofisk chalk reservoir are similar to those observed in high-temperature sandstone reservoirs.
File Format	HTM / HTML
ISSN	00036072
Issue Number	4
Volume Number	96
e-ISSN	15729699
Journal	Antonie van Leeuwenhoek
Language	English
Publisher	Springer
Publisher Date	2009-11-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Microbiology Discipline Immunology Archaea Classification Isolation & Purification Bacteria Biodiversity Petroleum Microbiology Genetics Growth & Development Cluster Analysis Dna, Archaeal Chemistry Dna, Bacterial Dna, Ribosomal Electrophoresis, Polyacrylamide Gel Methods Genes, Rrna Molecular Sequence Data North Sea Nucleic Acid Denaturation Phylogeny Rna, Archaeal Rna, Bacterial Rna, Ribosomal, 16s Sequence Analysis, Dna Sequence Homology, Nucleic Acid Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Microbiology

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