Molecular analysis of the bacterial community in a continental high-temperature and water-flooded petroleum reservoir.
Water from a continental high-temperature, long-term water-flooded petroleum reservoir in Huabei Oilfield in China was analysed for its bacterial community and diversity. The bacteria were characterized by their 16S rRNA genes. A 16S rRNA gene clone library was constructed from the community DNA, and using restriction fragment length polymorphism analysis, 337 randomly selected clones were clustered with 74 operational taxonomic units. Sequencing and phylogenetic analyses showed that the screened clones were affiliated with Gammaproteobacteria (85.7%), Thermotogales (6.8%), Epsilonproteobacteria (2.4%), low-G+C Gram-positive (2.1%), high-G+C Gram-positive, Betaproteobacteria and Nitrospira (each <1.0%). Thermopilic bacteria were found in the high-temperature water from the flooded petroleum reservoir, as well as mesophilic bacteria such as Pseudomonas-like clones. The mesophilic bacteria were probably introduced into the reservoir as it was being exploited. This work provides significant information on the structure of bacterial communities in high-temperature, long-term water-flooded petroleum reservoirs.
Institute of Applied Chemistry, East China University of Science and Technology, Shanghai, China.
Hui
H
Li
Shi-Zhong
SZ
Yang
Bo-Zhong
BZ
Mu
Zhao-Feng
ZF
Rong
Jie
J
Zhang
D001419:Bacteria / Q000145:classification* / Q000235:genetics; D004269:DNA, Bacterial / Q000032:analysis; D017753:Ecosystem; D005618:Fresh Water / Q000382:microbiology*; D006358:Hot Temperature; D007171:Implosive Therapy; D008969:Molecular Sequence Data; D010578:Petroleum / Q000382:microbiology*; D010802:Phylogeny; D017422:Sequence Analysis, DNA
D004269:DNA, Bacterial; D010578:Petroleum