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

摘要/Abstract

摘要：

通过色谱-质谱(GC-MS)分析,松辽盆地黑帝庙、萨尔图、葡萄花、高台子、扶余油层原油共检测到萘、菲、、联苯、芴、二苯呋喃、二苯并噻吩、三芳甾等11个系列164种芳烃化合物。其中,黑帝庙、萨尔图油层原油主要由三芳甾类化合物和菲系列化合物组成,葡萄花油层原油主要由菲系列和系列化合物组成,高台子、扶余油层原油主要由菲系列、系列和三芳甾类化合物所构成。菲系列、系列和三芳甾类化合物在纵向上的分布,均以葡萄花油层为拐点,由浅层黑帝庙油层至深层扶余油层,菲系列、系列呈现了由低变高的趋势,三芳甾类表现了由高变低的趋势。根据三芳甾含量、三芳甾类/菲系列、二甲基菲/三芳甾烷的组合关系,松辽盆地原油可划分为黑帝庙、萨尔图油层高三芳甾类原油,高台子、扶余油层低三芳甾类原油和葡萄花油层痕量三芳甾类原油。松辽盆地原油含有三芳甾类化合物和二苯并噻吩/菲很小,表明松辽盆地烃源岩主要形成于淡水-微咸水湖相的弱氧化环境。

关键词: 芳烃特征, 三芳甾烷, 原油, 松辽盆地

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

中图分类号:

TE112.1

李振广,冯子辉,宋桂侠,等. 松辽盆地原油芳烃分布、组成特征与原油类型划分[J]. 石油与天然气地质, 2005, 26(4): 494-500. doi: 10.11743/ogg20050416 Li Zhenguang,Feng Zihui,Song Guixia,et al. Distribution and composition of aromatic hydrocarbons and classification of oil in Songliao basin[J]. Oil & Gas Geology, 2005, 26(4): 494-500. doi: 10.11743/ogg20050416

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