西南石油大学学报(自然科学版) ›› 2003, Vol. 25 ›› Issue (5): 1-1–4.DOI: 10.3863/j.issn.1000-2634.2003.05.01

• 地质勘探 •     Next Articles

MICROBIAL DEGRADATION INFLUENCES ON HEAVE OIL CHARACTERS

ZHANG Ting-shan1 REN Ming-zhong1,2 LAN Guang-zhi1 WANG Hong-juan3 JIANG Zhao-yong1   

  1. (Southwest Petroleum Institute, Nanchong Sichuan 637001, China)
  • Received:2003-01-10 Revised:1900-01-01 Online:2003-10-20 Published:2003-10-20

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Abstract:

Degradation of oil is a most important part of the MEOR. This procedure can reduce the oil’s viscidity and freezing point and improve the oil’s fluxion in-situ. This paper shows the encouraging results of the microbial degradation on the heave oils gathered from several big oil fields in China. The results show that the bacteria can efficiently improve the property of the oils. The gum & asphalt content of the oils are lowered at above 9% and their structure is also changed a bit. The∑nC21-/∑ nC22+of the oils are enhanced through the microbial treatments and the shapes of oils in solution are changed greatly. The oils’ viscidity and freezing point are reduced about 15% and 20% respectively.

Key words: heave oil, microbes, degradation, oil character improvement

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