知识导航
资源分类

深部流体在富有机质烃源岩形成中的作用

深部流体在富有机质烃源岩形成中的作用

The role of deep fluid in the formation of organic-rich source rocks

The role of deep fluid in the formation of organic-rich source rocks

doi:
10.11764/j.issn.1672-1926.2017.11.013
摘要:
长期以来,关于富有机质烃源岩形成的研究主要集中于盆地之内,盆地之外流体活动对富有机质烃源岩形成的影响关注较少.深部流体作为联系沉积盆地内、外的纽带,通过提高海洋初级生产力和形成有利的有机质保存环境2个方面作用为富有机质烃源岩的形成创造条件.生产力方面,深部流体携带了大量NO3-、PO43-、NH4+等营养盐类,CH4、CO2、H2、NH3等热液气体和Fe、Mn、Zn、Co、Cu等微量金属元素以及来自地球内部的古细菌、嗜热细菌等微生物,它的注入促进了水体生物的繁盛和初级生产力的提高,为有机质的形成和富集创造了条件.保存环境方面,深部流体的喷发,向大气和海洋中输送了大量的CO2,与水体中的Ca2+、Mg2+等离子结合,形成碳酸盐类,增加了水体的盐度,促进了水体的分层和海水循环的静止,为海洋环境中有机质的富集创造了有利的水体动力学条件和氧化还原状态.而岩浆热液活动向大气和海洋输送的大量H2S、CO等还原性气体溶解于水中,同样可以促进水体还原环境的形成.因此,深部流体的喷发为富有机质烃源岩的形成提供了重要物质保障和有利的环境条件.
Abstract:
For a long time,the research of the formation of organic-rich source rocks has mainly focused on the inner basins.The effect of exogenous fluid on organic-rich source rocks' formation has received little concern.As the belt connecting the inner and external of a basin,deep fluid created proper condition for the formation of organic-rich source rocks,by promoting primary productivity and organic preservation.In productivity facet,deep fluid carried a large amount of nutrient such as NO3-,PO43-and NH4+,hydrothermal gases such as CH4,CO2,H2 and NH3,trace metal elements such as Fe,Mn,Zn,Co and C,as well as microbes from deep earth such as archaea bacteria and thermophilic bacteria.The injection of deep fluid not only promoted the thriving of organism and primary productivity,but also provided favorable conditions for organic formation and enrichment.In preservation facet,the eruption of deep fluid sent massive CO2 to atmosphere and ocean.By combining with ions like Ca2+ and Mg2+,these CO2 transformed into carbonate.As a result,it increased the salinity of water,which in return lead to the stratification and quiescence of water.All of above process created advantageous hydrodynamic condition and redox state for organic enrichment.Besides,the dissolution of reductive gas from magma and hydrothermal,such as H2S and CO,also contributed to the formation of reductive water condition.To sum up,the eruption of deep fluids provided significant ingredients sources and favorable preservation condition for the formation of organic-rich source rocks.
作者 刘佳宜 [1] 刘全有 [1] 朱东亚 [1] 孟庆强 [1] 刘文汇 [2] 邱登峰 [1] 黄振凯 [1]
Author: Liu Jia-yi[1] Liu Quan-you[1] Zhu Dong-ya[1] Meng Qing-qiang[1] Liu Wen-hui[2] Qiu Deng-feng[1] Huang Zhen-kai[1]
作者单位
  1. 页岩油气富集机理与有效开发国家重点实验室,北京100083;中国石化石油勘探开发研究院,北京100083
  2. 中国石化石油勘探开发研究院,北京100083;西北大学,陕西西安710069
期 刊: 天然气地球科学 ISTIC EI SCI PKU CSSCI
Journal: Natural Gas Geoscience
年,卷(期) 2018, 29(2)
分类号 TE122.1
关键词: 深部流体 知识脉络 营养元素 知识脉络 还原环境 知识脉络 生物繁盛 知识脉络 有机质富集 知识脉络
Keywords: Deep fluid Nutrient elements Reductive condition The thriving of organism Organic enrichment
机标分类号
基金项目 中国科学院战略性先导科技专项(A类)项目,国家杰出青年科学基金项目“成烃—成藏油气地球化学”
参考文献和引证文献
返回顶部参考文献
返回顶部引证文献
返回顶部本文读者也读过
返回顶部相似文献
返回顶部相关博文

知识产权声明| 服务承诺| 联系我们| 人才招聘| 客户服务| 关于我们

京ICP证:010071  互联网出版许可证:新出网证(京)字042号  京公网安备11010802020237号
万方数据知识服务平台--国家科技支撑计划资助项目(编号:2006BAH03B01)©北京万方数据股份有限公司  万方数据电子出版社