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四川盆地川西坳陷雷口坡组四段稀土元素地球化学特征及意义

梁世友 陈迎宾 赵国伟 王彦青 胡烨

梁世友, 陈迎宾, 赵国伟, 王彦青, 胡烨. 四川盆地川西坳陷雷口坡组四段稀土元素地球化学特征及意义[J]. 石油实验地质, 2017, 39(1): 94-98. doi: 10.11781/sysydz201701094
引用本文: 梁世友, 陈迎宾, 赵国伟, 王彦青, 胡烨. 四川盆地川西坳陷雷口坡组四段稀土元素地球化学特征及意义[J]. 石油实验地质, 2017, 39(1): 94-98. doi: 10.11781/sysydz201701094
Liang Shiyou, Chen Yingbin, Zhao Guowei, Wang Yanqing, Hu Ye. Geochemical characteristics of rare earth elements and their geological significance in the fourth member of the Middle Triassic Leikoupo Formation in western Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 94-98. doi: 10.11781/sysydz201701094
Citation: Liang Shiyou, Chen Yingbin, Zhao Guowei, Wang Yanqing, Hu Ye. Geochemical characteristics of rare earth elements and their geological significance in the fourth member of the Middle Triassic Leikoupo Formation in western Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 94-98. doi: 10.11781/sysydz201701094

四川盆地川西坳陷雷口坡组四段稀土元素地球化学特征及意义

doi: 10.11781/sysydz201701094
基金项目: 国家科技重大专项“大型油气田及煤层气开发”(2016ZX05005-001-005)资助。
详细信息
    作者简介:

    梁世友(1970-),男,在读博士,高级工程师,从事油气地质综合研究与油气资源评价工作。E-mail:wxlshy.syky@sinopec.com。

  • 中图分类号: P595

Geochemical characteristics of rare earth elements and their geological significance in the fourth member of the Middle Triassic Leikoupo Formation in western Sichuan Basin

  • 摘要: 沉积物中稀土元素配分模式及特征参数能够很好地反映沉积环境及流体性质与来源,应用于油气地质研究中可辅助判断烃源岩、储层沉积环境及油气来源等。川西坳陷雷口坡组四段碳酸盐岩稀土元素测试结果表明,稀土元素总量较低,轻、重稀土分异明显,具有明显的δCe负异常和δEu正异常。分析认为,低稀土元素总量、δCe负异常反映了雷四段沉积时为相对开放的弱氧化低能环境,有利于成烃生物的繁育和生长,可为雷四段烃源岩的形成提供物质基础;显著的δEu正异常表明了后期强还原环境下的流体活动,对有机质的保存有着重要作用。轻稀土富集、重稀土亏损、显著的δEu正异常以及与热液流体相似的稀土元素配分模式,表明川西雷四段经历过后期的热液蚀变与改造,而热液运移的通道也可为深层油气向上运移提供良好的输导条件。

     

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出版历程
  • 收稿日期:  2016-06-21
  • 修回日期:  2016-12-01
  • 刊出日期:  2017-01-28

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