| 烃源岩抽提物中藿烷分子碳同位素分析新方法及指示意义 |
| |
| 引用本文： | 鲁中灯,刘岩,陈祖林,樊云鹏,文志刚,徐耀辉,牛金,田永晶,柳波,谢小敏,谢巍.烃源岩抽提物中藿烷分子碳同位素分析新方法及指示意义[J].石油实验地质,2022,44(2):288-294. |
| |
| 作者姓名： | 鲁中灯 刘岩 陈祖林 樊云鹏 文志刚 徐耀辉 牛金 田永晶 柳波 谢小敏 谢巍 |
| |
| 作者单位： | 1.油气与环境地球化学湖北省重点实验室(长江大学 资源与环境学院), 武汉 430100; |
| |
| 基金项目： | 国家自然科学基金项目(41503034，41972122)、国家科技重大专项(2017ZX05001005)和中国地质调查局项目(20190085)资助。 |
| |
| 摘 要： | 以5?分子筛/氧化铝混合填料的层析柱对烃源岩抽提物进行了分离,成功获取了以藿烷类化合物为主的亚组分,可直接用于单化合物碳同位素分析.通过对典型海、陆相烃源岩中的藿烷碳同位素特征进行对比研究,结果表明准噶尔盆地二叠系芦草沟组湖相页岩中藿烷系列单体化合物的碳同位素值(δ13C)分布在-40.7‰～-62.7‰,且呈现出随着...
|
| 关 键 词： | 细菌 藿烷化合物 单体碳同位素 海相烃源岩 陆相烃源岩 四川盆地 准噶尔盆地 |
| 收稿时间： | 2021-05-10 |
An improved method and indications for the compound specific isotopic analysis of hopanes in source rock extracts |
| |
| Abstract: | With a mixed stationary phase of 5? molecular sieve/alumina, extracts of various kinds of source rocks are separated by column and sub-fractions dominated by hopanoid compounds were successfully obtained. The sub-fractions are suitable for the direct analysis on GC-IRMS to obtain compound specific isotopic values of hopanes. Comparison is carried out on isotopic signatures of specific hopanes in a lacustrine oil shale (Permian Lucaogou shale, Junggar Basin, NW China) and another Permian marine shale (NW of Sichuan Basin). Results show that the Permian Lucaogou shale had the δ13C values of hopanes distributed between -40.7‰ and -62.7‰, and decrease with the increasing of carbon number. The δ13C values of hopanes in marine shale of Sichuan Basin are apparently heavier, distribute between -20.5‰ and -45.4‰, and they appeared to be firstly decreased and then increased as carbon number increases. In both of the shales analyzed, the variation range of carbon isotopes of hopanes can be more than ±20‰ (±24.9‰ for the Sichuan Basin shale), which indicates multiple contribution to these compounds. The isotopic signatures of hopanes may be constrained by paleoenvironment, sources as well as maturation, however, compound specific isotope of hopanes is still a useful indicator for oil-source correlation. |
| |
| Keywords: | |
|
| 点击此处可从《石油实验地质》浏览原始摘要信息 |
|
点击此处可从《石油实验地质》下载全文 |
|
