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天然气地球科学 ›› 2008, Vol. 19 ›› Issue (1): 18–22.doi: 10.11764/j.issn.1672-1926.2008.01.18

• 天然气地球化学 • 上一篇    下一篇

典型海相油和典型煤成油轻烃组成特征及地球化学意义

王祥1,2,张敏1,2,黄光辉1,2   

  1. (1.长江大学地球化学系，湖北 荆州 434023;
    2.长江大学油气资源与勘探技术教育部重点实验室，湖北 荆州 434023)
  • 收稿日期:2007-10-23 修回日期:2008-01-06 出版日期:2008-02-10 发布日期:2008-02-10
  • 通讯作者: 王祥wangxiang_1980@163.com.cn. E-mail:wangxiang_1980@163.com.cn.
  • 基金资助:

    国家自然科学基金项目（编号：40573030）资助.

Compositions and Geochemical Characteristics of Light Hydrocarbonsin Typical Marine Oils and Typical Coal Formed Oils

WANG Xiang1,2,ZHNAG Min1,2,HUANG Guang-hui1,2   

  1. (1.Department of Geochemistry, Yangtze University, Jingzhou 434023, China; 
    2.The Key Laboratory of Oil & Gas Resources and Exploration Technology, Ministry ofEducation, Yangtze University, Jingzhou 434023, China)
  • Received:2007-10-23 Revised:2008-01-06 Online:2008-02-10 Published:2008-02-10

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696

摘要：

通过对塔里木盆地塔中隆起典型海相原油和吐哈盆地典型煤成油的轻烃组分、Mango参数和成熟度等分析后发现:2类原油轻烃组分含量差异明显，塔中隆起海相油富含正庚烷,吐哈盆地煤成油则富含甲基环己烷;塔中隆起海相油Mango参数K1值分布在0.97~1.19之间，与Mango所报道的结果相一致，而吐哈盆地煤成油的K1值却异常高（1.35~1.66）；塔中隆起海相油成熟度参数庚烷值(32.3%~45.4%)和异庚烷值(1.9~3.7)高于煤成油，已处于高成熟阶段，塔中隆起典型海相油的形成温度要明显高于吐哈盆地煤成油。

关键词: 海相油, 煤成油, 轻烃, 庚烷值, 异庚烷值, Mango轻烃参数

Abstract:

Based on the results of earlier studies on light hydrocarbons by several researchers, typical marine oils from the Tazhong area in the Tarim basin and typical coal-formed oils from the Turpan basin were selected and analyzed to find the differences of compositional characteristics of light hydrocarbons between the two oil categories and to provide new geochemical cognition for classifying the origin of oils. Through the GC-MS analytic technology, the light hydrocarbons data for two kinds of oils were obtained. (1) Light hydrocarbons of marine oils in the Tazhong area are rich in nC7, and the coal- formed oils from the Turpan basin are rich in MCyC6.(2) The Mango parameter K1 ranges from 0.97 to 1.19 in the marine oils, and it is consistent with the conclusion that Mango reported on light hydrocarbons based on a majority of crude oils data. But the K1 values of the coal-formed oils are particularly high (1.35～1.66) and far greater than marine oils. (3) Heptane values in the marine oils, from 32.3% to 45.4%, and isoheptane values, from 1.9 to 3.7, are respectively higher than the coal\|formed oils, which indicates that it is in a highly mature stage. (4) The expulsion temperatures for the coal-formed oils (96.8～102.2℃) are relatively lower than the marine oils (115.3～129.4℃).

Key words: Marine oil, Coa formed oil, Light hydrocarbon, Heptane value, Isoheptane value, Mango parameter.

中图分类号: 

  • TE122.1+13

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