Geochemistry Characteristics and Significance of the Pyrrolic Compounds in Petroleum

LI Su mei; WANG Tie guan; ZHANG Ai yun; GUO Sao hui; ZHANG Shui Chang

The behaviour of pyrrolic compounds in oils from Lunnan area,Tarim Basin,Xingzhang and Chaochang oil-fields,Songliao Basin,and Gasikuke oil-field,Chaidamu Basin are investigated,which are representive of marin,fresh lake,fresh to half salt lake and salt lake origin correspondingly.It wsa founded that there are abviously differences among the oils of different genetic type in both richness and relative distribution.Several geochemical factors which may have influence on the compounds are also discussed,such as paleoenvironment thermal maturity,original source materical and oil migration.The results indicated that the content and distribution of pyrrolic compounds are controled by several factors,and oil fractionation during migration,paleoenvironment are possibly the main factors,furthermore,maturity and original source material are also have effects on the compounds.It was determinedthat pyrrolic nitrogen compounds have potential significance in evaluating oil migration,paleoenvironment and thermal maturity.

1. University of Petroleum,Beijing ChangPing 102200;

2. China University of Geosciences,Beijing 100083

Received Date: 1998-09-02

Rev Recd Date: 1998-11-09

Publish Date: 1999-06-10

Key words:

Abstract: The behaviour of pyrrolic compounds in oils from Lunnan area,Tarim Basin,Xingzhang and Chaochang oil-fields,Songliao Basin,and Gasikuke oil-field,Chaidamu Basin are investigated,which are representive of marin,fresh lake,fresh to half salt lake and salt lake origin correspondingly.It wsa founded that there are abviously differences among the oils of different genetic type in both richness and relative distribution.Several geochemical factors which may have influence on the compounds are also discussed,such as paleoenvironment thermal maturity,original source materical and oil migration.The results indicated that the content and distribution of pyrrolic compounds are controled by several factors,and oil fractionation during migration,paleoenvironment are possibly the main factors,furthermore,maturity and original source material are also have effects on the compounds.It was determinedthat pyrrolic nitrogen compounds have potential significance in evaluating oil migration,paleoenvironment and thermal maturity.

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Reference (10)

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Geochemistry Characteristics and Significance of the Pyrrolic Compounds in Petroleum

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