大民屯凹陷烃源岩中高分子量烃的形成与分布特征

黄海平

doi:10.11781/sysydz200004297

大民屯凹陷烃源岩中高分子量烃的形成与分布特征

doi: 10.11781/sysydz200004297

黄海平

中国地质大学能源地质系, 北京100083

基金项目: 国土资源部青年地质学家基金资助项目(9602)

详细信息

作者简介:
黄海平(1962- ),男(汉族),江苏无锡人,副教授,主要从事油气地球化学和油藏地球化学的教学与研究.

中图分类号: TE122.1
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出版历程
- 收稿日期: 2000-02-14
- 刊出日期: 2000-10-25

FORMING MECHANISM OF HYDROCARBON POOLS IN TAHE OILFIELD OF THE NORTHERN TARIM BASIN

HUANG Hai-ping

Department of Energy Resource Geology, China University of Geosciences, Beijing 100083, China

摘要

摘要: 大民屯凹陷原油以高含蜡著称,对沙河街组低成熟烃源岩抽提物的高温气相色谱分析揭示了高分子量化合物的组成与分布特征。研究表明有机质的原始组成和沉积环境是形成高分子量烃类的主要控制因素。有机质含量较高的烃源岩(TOC>3.0%)显微组成中类脂组的含量较高,岩石抽提物不仅总量较高,而且含蜡量较高,但在蜡的组成上以中分子量的显晶蜡为主,形成于弱还原环境。有机质含量较低的烃源岩(TOC<2.0%)显微组成中镜质组的含量较高,岩石抽提物含量及含蜡量均较低,但在蜡的组成上高分子量的微晶蜡相对富集,形成于弱氧化环境。除正构烷烃外,岩石抽提物中还检出了含量较高的异构烷烃。
- 高分子量烃 /
- 高温气相色谱 /
- 显微组成 /
- 沉积环境
Abstract: High temperature GC analysis of high molecular weight hydrocarbons (HMWHCs) was performed on marginal mature source rock extractions from the Shahejie Formation, Damintun Depression, whose oil is particularly rich in wax. Organic composition and depositional environment are the main control factors for the formation of HMWHCs. The main maceral components in organic-rich samples (TOC>3.0%) are liptinite and exinite, deposited in relatively reduced environment. They contain high amount of waxes but dominated by macrocrystalline ones (centred at C₂₉). Those organic-lean samples (TOC<2.0%) are dominated by vitrinite, deposited in a slightly oxidized environment. They contain lower amount of waxes but relatively rich in microcrystalline components. Besides normal alkanes, high amounts of branched/cyclic hydrocarbons have been detected in the region above C₅₀.
- high molecular weight hydrocarbons /
- high temperature gas chromatography /
- maceral composition /
- depositional environment

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参考文献(17)

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