石油学报 ›› 1983, Vol. 4 ›› Issue (2): 17-21.DOI: 10.7623/syxb198302003

• 论文 • 上一篇    下一篇

原油热演化程度与碳同位素组成变化关系

王涵云, 杨天宇   

  1. 四川石油勘探开发研究院
  • 收稿日期:1982-09-05 出版日期:1983-04-25 发布日期:2013-08-27

ON THE RELATIONSHIP BETWEEN THE DEGREE OF THERMAL EVOLUTION AND THE CHANGES IN CARBON ISOTOPE COMPOSITION OF CRUDE OIL

Wang Hanyun, Yang Tianyu   

  1. Research Institute for Petroleum Exploration and Development, Sichuan
  • Received:1982-09-05 Online:1983-04-25 Published:2013-08-27

摘要: 通过开展对未成熟干酪根的热模拟实验,测定干酪根在不同演化阶段产出液体烃的碳同位素组成.阐明由于演化影响导致原油中碳同位素分馏的原因,并结合模拟实验结果验证和解释了地层中母岩干酪根和所产原油在高成熟阶段碳同位素组成发生“逆转”的现象,同时,提出利用碳同位素对多产层地区油/油源对比中,必须注意演化程度要在相同的演化阶段才有可比性,特别在高成熟地区,否则有可能导致错误判断.

关键词: 干酪根碳同位素, 碳同位素组成, 原油, 液体烃, 热演化程度, 演化阶段, 热模拟实验, 成熟阶段, 变化关系, 油源对比

Abstract: Carbon isotope composition of liquid hydrocarbons formed in different stages of gvolution of kerogen is determined by thermal simulation experiments on immature kerogen.The cause of fractionation of carbon isotope in the crude during the process of evolution is given,and the "reverse reactions" in the carbon isotope composition of kerogen in the matrix and of crude oil formed during the highly mature sta ge is identified and explained.It is pointed out that in the application of carbon isotope to the comparative study of crude oil and its source in the multizone regions,care should be taken that the comparison of the degree of evolution is valid only for kerogen or oil of the same stage of evolution,particularly for those from the highly mature regions,otherwise it may lead to misleading conclusions.