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原油中单体烃类在线同位素分析是用色谱仪将包括生物标记化合物在内的化合物分离，经燃烧转化为二氧化碳，然后直接送气体同位素质谱仪进行单体烃碳同位素测定。用此项技术分析吐哈盆地台北凹陷4个含油气构造的油、老样品，认为：葡萄沟构造原油与神泉构造原油同源，可能产白煤系地层；胜金口村造原油则与玉果构造原油同源，可能产自泥质烃源岩。分析结果表明，该盆地中即使在较近范围内也存在着不同层系、不同类型、彼此封隔性较好的烃源岩。
On-line isotope analysis of monomeric hydrocarbons in crude oil is carried out by using a chromatograph to separate compounds including biomarker compounds, converting them to carbon dioxide by combustion, and then directly sending a gas isotope mass spectrometer to determine the carbon isotopes of the monomers. This technique is used to analyze the oil and gas samples of the four oil and gas structures in the Taipei depression of the Turpan-Hami basin. It is believed that the oil in the Puigou structural oil is of the same origin as the Shenquan structural oil, Fruit structure of crude oil homology, may be produced from the mud source rock. The analysis results show that there are source rocks with different layers, different types and good isolation between each other in the basin even in the close range.