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东濮凹陷邢庄地区原油地球化学特征

断块油气田

2004年 11卷第06期

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Title

Geochemical Characteristics of Crude Oil in Xingzhuang Region in Dongpu Depression

作者

李林强　林壬子

Authors

Li Linqiang , Lin Renzi

单位

石油大学资源与信息学院,北京

摘要

通过对东濮凹陷邢庄地区原油和储层抽提物的GC 和GC - MS 检测,探讨了该区原油的地球化学特征。分析结果表明,邢庄地区原油具有正构烷烃奇偶优势和较低甾、萜烷异构体比值,属于典型的低熟原油。该区原油具有较低的姥鲛烷/ 植烷比值和较高的伽马蜡烷含量,反映了其生烃母质形成于半咸水- 咸水的还原环境,而相对较高的C27/ C29αααR 规则甾烷比值则揭示了原油母源的物源输入以水生生物为主。

Abstract

The crude oil and extracts of reservoir in Xingzhuang

region in Dongpu depression are detected by GC or GC-MS

techniques. The analysis results show that the maturity of oil

in Xingzhuang region is lower and most of oils still keep odd

even predominance and low ratios of sterane and terpane

maturity index. The low Pristane/ Phytane ratio and the

high Gammacerane content indicates the source rocks of

crude oil forming in brackish-saline deoxidize environment ,

and the high C₂₇/ C₂₉αααR steranes ratio indicates the main

source input of source rock is aquatic biology.

关键词：

东濮凹陷　低成熟油　地球化学特征　甾烷　萜烷;

Keywords:

Dongpu depression , Low mature oil , Geochemical characteristics ,Sterane ,Hopane

;

基金项目

DOI