松辽盆地原油芳烃分布、组成特征与原油类型划分

doi:10.11743/ogg20050416

Abstract

Abstract:

Through gas chromatographic-mass spectrometric(GC-MS) analyses,11 series and 164 aromatic hydrocarbons,including naphthalene,phenanthrene,chrysene,biphenyl,fluorene,dibenzofuran,dibenzothiophene,triaromatic steroid,etc.,have been detected in oil sampled from Heidimiao,Saertu,Putaohua,Gaotaizi and Fuyu oil layers in Songliao Basin.Crude oil in Heidimiao and Saertu layers are mainly composed of triaromatic sterides and compounds of phenanthrene family.Crude oil in Putaohua layer are mainly composed of compounds of phenanthrene and chrysene families.Crude oil in Gaotaizi and Fuyu layers are mainly composed of compounds of phenanthrene and chrysene families and triaromatic sterides.All the break-points in vertical distributions of compounds of phenanthrene and chrysene families and triaromatic sterides appear at Putaohua layer,i.e.from the shallower Heidimiao layer to the deeper Fuyu layer,the contents of phenanthrene and chrysene families are tending to increase,while that of triaromatic sterides are tending to decrease.According to the content of triaromatic steroid and the combination of triaromatic sterides/phenanthrene family and dimethylphenanthrene/triaromatic steroid,crude oil in Songliao basin can be divided into three types,including the high triaromatic sterides crude oil in Heidimiao and Saertu layers,the low triaromatic sterides crude oil in Gaotaizi and Fuyu layers and trace triaromatic sterides crude oil in Putaohua layer.Based on crude oil in Songliao basin containing triaromatic sterides and the dibenzothiophene/phenanthrene being very low,it is believed that the source rocks in Songliao basin would have been deposited in weak oxidizing environment in freshwater-brackish lake.

Key words: crude oil, Songliao basin, characteristics of aromatic hydrocarbon, triaromatic steroid

CLC Number:

TE112.1

Li Zhenguang, Feng Zihui, Song Guixia, Wang Xue. Distribution and composition of aromatic hydrocarbons and classification of oil in Songliao basin[J]. Oil & Gas Geology, 2005, 26(4): 494-500.

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Distribution and composition of aromatic hydrocarbons and classification of oil in Songliao basin

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