鄂尔多斯盆地西缘上古生界泥岩饱和烃Pr/Ph值特征及其地质应用

孙林，李剑锋，姬鹏程，任军峰

doi:10.11764/j.issn.1672-1926.2012.06.1116

天然气地球科学 >

2012 , Vol. 23 >Issue 6: 1116 - 1120

DOI: https://doi.org/10.11764/j.issn.1672-1926.2012.06.1116

天然气地球化学

鄂尔多斯盆地西缘上古生界泥岩饱和烃Pr/Ph值特征及其地质应用

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1.中国石油长庆油田分公司勘探开发研究院，陕西西安 710018； 2.低渗透油气田勘探开发国家工程实验室，陕西西安 710018； 3.中国石油长庆油田分公司苏里格气田开发指挥部，陕西西安 710018

孙林(1978-)，女，湖南湘潭人，工程师，主要从事区域地质勘探及油气地球化学研究. E-mail:slin_cq@petrochina.com.cn.

收稿日期: 2012-03-20

修回日期: 2012-11-15

网络出版日期: 2012-12-10

基金资助

中国石油与天然气股份公司重大科技专项(编号:2011E-13)资助.

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Pr/Ph Value of Saturated Hydrocarbon from the Upper Paleozoic Mudstone in Western Ordos Basin and Its Applications

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1.Exploration& Development Research Institute of PetroChina Changqing Oilfield Company, Xi′an 710018, China;
2.National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields,Xi′an 710018, China;
3.Sulige Gasfield Development Headquarters of PetroChina Changqing Oilfield Company, Xi′an 710018, China

Received date: 2012-03-20

Revised date: 2012-11-15

Online published: 2012-12-10

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摘要

通过对鄂尔多斯盆地西缘上古生界泥岩有机母质类型、有机母质热演化程度、有机质沉积环境等方面与泥岩饱和烃Pr/Ph值之间关系的分析，首次认识到西缘上古生界泥岩饱和烃姥鲛烷与植烷的比值(Pr/Ph值)小于1.0，并且主要受沉积环境水体咸度的影响，与有机母质类型、有机母质热演化程度的关系不明显。应用泥岩、煤岩饱和烃Pr/Ph值特征对盆地西缘上古生界凝析油的来源进行判识，指出上古生界凝析油主要来源于煤系地层，进而认为煤系地层在上古生界天然气成藏中起着决定性的作用。

关键词： 鄂尔多斯盆地西缘; 上古生界; 泥岩; Pr/Ph值特征

本文引用格式

孙林，李剑锋，姬鹏程，任军峰 . 鄂尔多斯盆地西缘上古生界泥岩饱和烃Pr/Ph值特征及其地质应用[J]. 天然气地球科学, 2012 , 23(6) : 1116 -1120 . DOI: 10.11764/j.issn.1672-1926.2012.06.1116

Abstract

Based on the relationship between the Pr/Ph values of mudstone saturated hydrocarbons and the types/maturity/depositional environment of organic matters in the Upper Paleozoic mudstone from the western Ordos basin,it is demonstrated that the Pr/Ph values which are lower than 1.0 are affected by the salinity of the depositional water medium and have no obvious correlation with the types and maturity of the organic matter.According to the Pr/Ph values of the saturated hydrocarbons in the mudstone and coal, it is concluded that the upper Paleozoic condensate oil in the western Ordos basin is originated from coal measures which has great significance on the upper Paleozoic gas accumulation.

Key words： Western Ordos basin; Upper Paleozoic; Mudstone; Pr/Ph value

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