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Paper Information

Journal:   ENVIRONMENTAL SCIENCES   WINTER 2006 , Volume 3 , Number 10; Page(s) 51 To 57.
 
Paper: 

METHANOGENIC LIFE UNDER EXTREME CONDITIONS IN AN OIL RESERVOIR

 
 
Author(s):  TABATABAEI M.A.S., MAZAHERI ASADI MAHNAZ
 
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Abstract: 

Petroleum, which is a complex component of hydrocarbons, has been formed in the deep subsurface under conditions of high pressure, salinity and temperature. By now, several different studies have proved the presence of indigenous microorganisms consistent with the extreme conditions of oil reservoirs such as high temperature, high salinity and pressure. Archaea are an ancient group of bacteria with unique structural and genetic properties that are placed in the third domain of life and are able to endure the extreme and exclusive conditions of these reservoirs. The main archaeal residents in oil reservoirs are methanogens that produce methane as a part of their internal metabolism. In this investigation the presence and growth of methanogens at temperatures between 20oc to 60oc and salinities up to the level of saturation have been studied. Gas chromatography and electron microscopic observations were examined to study methanogenic life. Cultivation was done under anaerobic conditions in serum bottles with atmospheric adjustment of N2, CO2+H2.

 
Keyword(s): METHANOGENS, OIL, TEMPERATURE, SALINITY
 
References: 
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