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本文利用新兴的原油单体烃类在线同位素分析技术（ＧＣ－Ｃ－ＭＳ）测定了塔里木盆地原油及凝析油的正构烷烃、轻烃部分的异构烷烃和植烷、姥鲛烷的稳定碳同位素值。根据原油单体烃的碳同位素分布，并结合地质情况，将塔里木盆地原油分为源于下古生界、上古生界、中新生界和上述源岩混源的４种成因类型，并确认塔里木盆地是一个以下古生界油源为主的多油源的复合含油气盆地。本文还对原油单体烃碳同位素分布特征及成因等问题进行了初步探讨。
In this paper, the new crude oil monomer hydrocarbon online isotope analysis (GC-C-MS) was used to determine the stability and stability of n-alkanes, light hydrocarbons and isoparaffins of crude oil and condensate in Tarim Basin Carbon isotope values. According to the distribution of carbon isotopes of single hydrocarbon of crude oil, and combining with the geological conditions, the oil in Tarim Basin is divided into four types of genetic types derived from the Lower Paleozoic, Upper Paleozoic, Mesozoic and Mesozoic and mixed source rocks, The basin is a multi-oil source composite petroliferous basin dominated by the Paleozoic source. The paper also discussed the characteristics of carbon isotope distribution of crude oil monomer and its causes.