准噶尔盆地上三叠统泥页岩解析气特征

高岗，柳广弟，王绪龙，张越千，孔玉华，张道旻，高劲

doi:10.11764/j.issn.1672-1926.2013.06.1284

天然气地球科学 >

2013 , Vol. 24 >Issue 6: 1284 - 1289

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.06.1284

非常规天然气

准噶尔盆地上三叠统泥页岩解析气特征

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1.中国石油大学油气资源与探测国家重点实验室，北京 102249；
2.中国石油新疆油田分公司，新疆克拉玛依 834000

高岗(1966-)，男，陕西高陵人，副教授，博士，主要从事油气地质与油气勘探研究. E-mail：Gaogang2819@sina.com.

收稿日期: 2013-01-30

修回日期: 2013-05-21

网络出版日期: 2013-12-10

基金资助

全国油气资源战略选区调查与评价专项“西北区页岩气资源调查评价与选区”子项目(编号:14B12XQ150903)资助.

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Characteristics of Separated Shale Gas from the Upper Triassic of Junggar Basin

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1.State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
2.Xinjiang Oilfield Company, CNPC,Karamay 834000, China

Received date: 2013-01-30

Revised date: 2013-05-21

Online published: 2013-12-10

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摘要

在准噶尔盆地上三叠统泥页岩地质与有机地球化学特征分析基础上，对准噶尔盆地达9井上三叠统泥页岩岩心含气量进行了测定，分析了页岩气的成分组成与碳同位素特征。泥页岩中有一定的含气量，主要在0.18～0.24m 3/t之间，气体成分以烃类气体为主，二氧化碳、氮气等非烃气体含量较低。甲烷为烃类气体的主要成分，重烃含量较低，相同分子量的异构烷烃占优势，烃类气体具干气特征。非烃气体中的氮气含量明显高于二氧化碳。烃类气体碳同位素值较低，显示出常规低成熟原地腐泥型天然气特征，这种特征可能与短时间解析和烃源岩演化程度有关，具体原因有待进一步深入研究。

关键词： 页岩气; 上三叠统; 解析气; 准噶尔盆地

本文引用格式

高岗，柳广弟，王绪龙，张越千，孔玉华，张道旻，高劲 . 准噶尔盆地上三叠统泥页岩解析气特征[J]. 天然气地球科学, 2013 , 24(6) : 1284 -1289 . DOI: 10.11764/j.issn.1672-1926.2013.06.1284

Abstract

Based on the geological and organic geochemical features of the Upper Triassic mudstone in Junggar Basin,mudstone core gas content of the Upper Triassic in the well Da 9 wad determined,as well as the molecular composition and carbon isotopes of the gaseous hydrocarbons.Mudstone has some content of gas,mainly 0.18-0.24m³/t.The gas is dominated by alkane gas,with low level of nonhydrocarbon such as CO₂ and N₂,etc.The alkane gas is dominated by methane with low content of heavy hydrocarbon,indicating dry gas.For hydrocarbons with same molecular weight,isoparaffin is more predominant than normal paraffin.Among the nonhydrocarbon,nitrogen has apparently higher content than CO₂.Alkane gas has relatively low carbon isotopes,demonstrating features of low-mature sapropel-type natural gas in place which might be related to short time desorption and lower maturity of source rock etc.

Key words： Shale gas; Upper Triassic; Separating gas; Junggar Basin

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