原油中C<sub>26</sub>－C<sub>28</sub>三芳甾烷相对含量计算方法及其应用

张宝收; 李美俊; 赵青; 王铁冠; 张科; 肖中尧; 黄少英

doi:10.11781/sysydz201605692

原油中C₂₆－C₂₈三芳甾烷相对含量计算方法及其应用

doi: 10.11781/sysydz201605692

1.
中国石油塔里木油田分公司勘探开发研究院, 新疆库尔勒 841000
2. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249

基金项目: 国家自然科学基金项目（41272158）和油气资源与探测国家重点实验室项目（PRP/indep-2-1402）资助。

详细信息

作者简介:
张宝收(1976-),男,硕士,高级工程师,从事油藏地球化学和石油地质科研工作.E-mail:zhangbaos-tlm@petrochina.com.cn.

通讯作者:
李美俊(1972-),男,博士,教授,博士生导师,从事油藏地球化学及环境化学的教学科研工作.E-mail:meijunli@cup.edu.cn.

中图分类号: TE122.1
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出版历程
- 收稿日期: 2015-08-03
- 修回日期: 2016-08-02
- 刊出日期: 2016-09-28

Determining the relative abundance of C₂₆-C₂₈ triaromatic steroids in crude oils and its application in petroleum geochemistry

1.
Petroleum Exploration & Production Research Institute, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

摘要

摘要: 三芳甾烷（TAS）是规则甾烷芳构化产物，其中C₂₆-C₂₈三芳甾烷系列稳定分布于原油和烃源岩有机质中。在常规色谱-质谱分析得到的芳烃馏分（m/z231）质量色谱图上，由于C₂₆20R和C₂₇20STAS异构体共流出而不能确定3种不同碳数三芳甾烷的相对含量，无法建立类似于C₂₇-C₂₉规则甾烷的相对含量三角图，从而使三芳甾烷在油气地球化学中的应用受到限制。以塔里木盆地台盆区古生界代表性原油样品为例，建立了三芳甾烷相对含量三角图，并用北部湾盆地福山凹陷古近系原油进行了验证。结果表明：该区存在2种不同来源的原油，可以划分为2个不同的原油族群，而来自福山凹陷古近系的原油具有不同的C₂₆-C₂₈三芳甾烷组成特征，原油族群的划分也得到其他分子地球化学证据的支持。在高成熟的轻质油和凝析油中，规则甾烷系列由于浓度低而很难由常规的色谱-质谱分析技术进行检测和鉴定，三芳甾烷由于相对较高的热稳定性而稳定存在，因此可代替规则甾烷用于油-油对比和原油族群划分。
- 三芳甾烷 /
- 原油族群 /
- 色谱—质谱分析 /
- 塔里木盆地 /
- 北部湾盆地
Abstract: Triaromatic steroids (TAS) may be formed by the aromatization of regular steranes. C₂₆-C₂₈ TAS widely occur in crude oils and source rocks. The C₂₆20R and C₂₇20S TAS typically co-elute with each other in m/z 231 mass chromatograms of aromatic fractions. Therefore, the relative abundance of C₂₆, C₂₇ and C₂₈ TAS cannot be determined by routine GC-MS analysis. A ternary diagram similar to that of C₂₇-C₂₈-C₂₉ regular steranes cannot be established to classify oil families, which leads to the limited use of TAS in petroleum geochemistry. This paper proposed a simple method to estimate the relative abundance of homologues and isomers of TAS on the basis of the distribution patterns, origin and thermal evolution of TAS isomers. Taking representative Paleozoic oil samples from the tectonic region of the Tarim Basin as an example, this paper distinguished two petroleum populations on the ternary diagram of C₂₆-C₂₇-C₂₈ triaromatic steroids determined by routine GC-MS analysis. The oils from the Fushan Sag in the Beibuwan Basin (South China Sea) have different distribution patterns of TAS. The oil family classification is also consistent with that by other molecular markers. For their relatively higher thermal stabilities, triaromatic steroids are generally present in significant abundance in oils and condensates with high maturity. Therefore, this ternary diagram of aromatic steroids is a potential geochemical indicator for oil-to-oil correlation and oil family classification as a substitute for that of regular steranes.
- triaromatic steroid (TAS) /
- oil family /
- gas chromatography-mass spectrometry /
- Tarim Basin /
- Beibuwan Basin

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参考文献(26)

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原油中C₂₆－C₂₈三芳甾烷相对含量计算方法及其应用

doi: 10.11781/sysydz201605692

作者简介:
张宝收(1976-),男,硕士,高级工程师,从事油藏地球化学和石油地质科研工作.E-mail:zhangbaos-tlm@petrochina.com.cn.

通讯作者:
李美俊(1972-),男,博士,教授,博士生导师,从事油藏地球化学及环境化学的教学科研工作.E-mail:meijunli@cup.edu.cn.

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Determining the relative abundance of C₂₆-C₂₈ triaromatic steroids in crude oils and its application in petroleum geochemistry

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原油中C26－C28三芳甾烷相对含量计算方法及其应用

doi: 10.11781/sysydz201605692

作者简介: 张宝收(1976-),男,硕士,高级工程师,从事油藏地球化学和石油地质科研工作.E-mail:zhangbaos-tlm@petrochina.com.cn.

通讯作者: 李美俊(1972-),男,博士,教授,博士生导师,从事油藏地球化学及环境化学的教学科研工作.E-mail:meijunli@cup.edu.cn.

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出版历程

Determining the relative abundance of C26-C28 triaromatic steroids in crude oils and its application in petroleum geochemistry

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出版历程

目录

原油中C₂₆－C₂₈三芳甾烷相对含量计算方法及其应用

作者简介:
张宝收(1976-),男,硕士,高级工程师,从事油藏地球化学和石油地质科研工作.E-mail:zhangbaos-tlm@petrochina.com.cn.

通讯作者:
李美俊(1972-),男,博士,教授,博士生导师,从事油藏地球化学及环境化学的教学科研工作.E-mail:meijunli@cup.edu.cn.

Determining the relative abundance of C₂₆-C₂₈ triaromatic steroids in crude oils and its application in petroleum geochemistry