川中地区侏罗系烃源岩和原油中三环萜烷分布特征及指示意义

doi:10.13686/j.cnki.dzyzy.2023.06.011

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摘要借助气相色谱-质谱技术,通过对川中地区侏罗系大安寨段烃源岩及原油样品的系统地球化学分析,揭示了生物标志物中三环萜烷系列的分布特征,并探讨了其对于沉积环境和生物来源的指示意义. 结果表明:大安寨段烃源岩及原油姥植比Pr/Ph中等,C₁₉-C₂₆三环萜烷呈现C₂₁优势. C₁₉₊₂₀和C₂₃的相对百分含量较低,C₂₄TeT/C₂₆TT值大于1,指示大安寨段沉积时期水体较浅,生源构成以菌藻生源为主,兼有丰富的高等植物生源的混源输入,形成于弱还原的淡水湖相环境.

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	杨岩岩
	唐友军
	洪海涛
	李美俊
	吴长江
	张吉振
	卢晓林

关键词 ：烃源岩, 三环萜烷, 沉积环境, 大安寨段, 侏罗系, 川中地区

Abstract：The distribution characteristics of tricyclic terpenes in biomarkers and their indicative significance for sedimentary environment and biological sources are discussed through the systematic geochemical analysis of source rocks and crude oil samples from Jurassic Da'anzhai Member in central Sichuan Basin by gas chromatography-mass spectrometry (GC-MS). The results show that the Pr/Ph ratios of source rocks and crude oil are medium level, with C₁₉-C₂₆ tricyclic terpenes showing the dominance of C₂₁, low relative percentages of C₁₉₊₂₀ and C₂₃ contents, and C_24TeT/C₂₆TT value greater than 1, indicating that the water was shallow during the sedimentary period of Da'anzhai Member, and the biogenesis was mainly bacteria and algae, with rich mixed-source input of higher plants, which was formed in the weak reduction environment of freshwater lake facies.

Key words： source rock tricyclic terpane sedimentary environment central sichuan basin Da'anzhai Member Jurassic central Sichuan Basin

收稿日期: 2021-05-31

PACS:	P593
	P618.13

基金资助:国家自然科学基金项目"苯基多环芳烃检测及其石油地球化学意义"(41972148);国家自然科学基金重点项目"深层油气的来源和演化:单体化合物和硫碳同位素限定"(41730424).

通讯作者: 唐友军(1975-),男,博士,副教授,主要从事油气成藏方面的教学与研究工作,通信地址湖北省武汉市蔡甸区大学路111号,E-mail//tyj@yangtzeu.edu.cn E-mail: tyj@yangtzeu.edu.cn

作者简介: 杨岩岩(1995-),女,硕士研究生,地质工程专业,通信地址湖北省武汉市蔡甸区大学路111号,E-mail//1346794128@qq.com

引用本文:

杨岩岩, 唐友军, 洪海涛, 李美俊, 吴长江, 张吉振, 卢晓林. 川中地区侏罗系烃源岩和原油中三环萜烷分布特征及指示意义[J]. 地质与资源, 2023, 32(6): 743-749.
YANG Yan-yan, TANG You-jun, HONG Hai-tao, LI Mei-jun, WU Chang-jiang, ZHANG Ji-zhen, LU Xiao-lin. DISTRIBUTION AND INDICATION OF TRICYCLIC TERPANE IN JURASSIC SOURCE ROCKS AND CRUDE OIL IN CENTRAL SICHUAN BASIN. GEOLOGY AND RESOURCES, 2023, 32(6): 743-749.

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http://manu25.magtech.com.cn/Jweb_dzyzy/CN/10.13686/j.cnki.dzyzy.2023.06.011 或 http://manu25.magtech.com.cn/Jweb_dzyzy/CN/Y2023/V32/I6/743

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