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柯克亚凝析气田是塔里木盆地主要的凝析气田,通过色谱指纹技术对柯克亚地区不同层位的32个油样的轻烃进行了分析,结果表明:甲基环己烷指数总体低于50%,轻烃MCYC6<40%,nC7>65%,上述轻烃特征都反应了一种典型海相油特征,说明该区凝析油可能来自石炭-二叠系源岩。该区凝析油除K12井外,均未检测到芳烃化合物。轻烃蚀变星图分布模式和庚烷值、异庚烷值分布特征都反应该区凝析油可能遭受了水洗等多种次生变化。
The Kirkja condensate gas field is the main condensate gas field in the Tarim Basin. Chromatographic fingerprinting was used to analyze the light hydrocarbons of 32 oil samples from different layers in Kekeya region. The results showed that the methylcyclohexane index was generally low At 50%, light hydrocarbon MCYC6 <40%, nC7> 65%, all of the above light hydrocarbon features reflect the characteristics of a typical marine oil, indicating that the condensate oil in this area may come from Permo-Carboniferous source rocks. In addition to the K12 well condensate in this area, were not detected aromatic compounds. Light hydrocarbon alteration star pattern distribution pattern and heptane value, isoheptane value distribution characteristics of the condensate oil in this area may have suffered a variety of secondary changes such as washing.