ELEMENTARY RESEARCH ON OIL NITROGEN ISOTOPIC GE OCHEMISTRY IN TARIM BASIN
Received date: 2004-02-12
Revised date: 2004-02-25
Online published: 2004-04-20
Nitrogen isotopic samples of oils in Tarim basin were prep ared with Kjeldahl method and the ratios were measured. The results show that δ15N values of oil and source rock can be correlated but vary with ge ological age and different tectonic zones. Oil δ15N in Tazhong zone is lo west with most values below 1‰; it has some higher value in Tabei zone but stil l near zero on the whole. Whereas the δ15N distribution in Kuche zone is d iscrete with value maximum 18.11‰ and minimum 2.77‰,the difference being 15.34 ‰. Oil δ15N in Ordovician formation of YH5 well is lower than that in Te rtiary Formation, which suggests that oil in the zone is a mixer of two differen t sources. Oil δ15N values in different formations of well Lunnan 14 decr ease from bottom to the top reservoir gradually so it is speculated that hydroca rbon migration may have occurred vertically.
CHEN Chuan-ping, MEI Bo-wen . ELEMENTARY RESEARCH ON OIL NITROGEN ISOTOPIC GE OCHEMISTRY IN TARIM BASIN [J]. Natural Gas Geoscience, 2004 , 15(2) : 178 -181 . DOI: 10.11764/j.issn.1672-1926.2004.02.178
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