Phylogenetic diversity of microbial communities associated with the crude-oil, large-insoluble-particle and formation-water components of the reservoir fluid from a non-flooded high-temperature petroleum reservoir

作者: Hajime Kobayashi , Keita Endo , Susumu Sakata , Daisuke Mayumi , Hideo Kawaguchi

DOI: 10.1016/J.JBIOSC.2011.09.015

关键词:

摘要: The diversity of microbial communities associated with non-water-flooded high-temperature reservoir the Niibori oilfield was characterized. Analysis saturated hydrocarbons revealed that n-alkanes in crude oil from were selectively depleted, suggesting might be mildly biodegraded reservoir. To examine if any specific microorganism(s) preferentially attached to or other components (large insoluble particles and formation water) fluid, 16S rRNA gene clone libraries constructed each component fluid. clones archaeal (414 total) represented 16 phylotypes, many which closely related methanogens. bacterial (700 composed 49 phylotypes belonging one phylum-level groupings, Firmicutes containing greatest phylotypes. In crude-oil- large-insoluble-particle-associated communities, a Methanosaeta-related phylotype dominated sequences, whereas hydrogenotrophic methanogens occupied major portion sequences library formation-water-associated community. crude-oil community showed largest diversity, 35 not detected communities. Thus, although populations reservoir-fluid largely shared common phylogenetic context, fraction species particles.

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