STUDY OF SPECIES COMPOSITION OF MICROBIAL COMMUNITY OF WATER-FLOODED OIL-FIELD BY CHROMATO-MASS SPECTROMETRY

The fatty acids of bacteria inhabiting the near-bottom zone of the inj ection wells of the Talinsk oil field were analyzed by chromate-mass s pectrometry. The community composition was determined from the total p rofile of normal and hydroxy fatty acids in the microbial association with which the stratal water backflushed from the injection well had b een primarily inoculated. Sulfate-reducing bacteria, pseudomonads, thi onic, fermentative, and other concomitant microorganisms were found in the sample. It was concluded that lipids to be used as chemical marke rs in obtaining valuable information on the components of the microbia l biomass of oil fields should be studied further.