Oil & Gas Geology ›› 2001, Vol. 22 ›› Issue (3): 207-209.doi: 10.11743/ogg20010303

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CHARACTERISTICS OF NITROGEN ISOTOPE IN DIFFERENT DEPOSITONAL ENVIRONMENTS IN CHINA

Chen Chuanping, Mei Bowen   

  1. Jianghan Petroleum Institute, Jingzhou, Hubei
  • Received:2001-03-10 Online:2001-09-25 Published:2012-01-16

Abstract:

The test results of nitrogen isotopic samples of several crude oils and kerogens in China's different depositional environments suggest that nitrogen isotope is related to depositional environment. The 15N of oils formed in fresh water environment is about 0.3%~0.6%;the 15N ratios of deposits in salt and brackish waters are the heaviest,15N is generally above 1%;whereas that in Paleozoic marine carbonate rock and the oil from it is below 0 or less than 0.

Key words: crude oil, nitrogen isotope, Kjeldahl method, depositional environment, China

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