新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (3): 268-271+180.

• 国外油气地质 • 上一篇    下一篇

洋壳蛇纹岩——生烃源

А.Н. Дмитриевский1, И.Е. Баланюк2, О.Г. Сорхтин, А.Ш. Донгарян2, 任俞(译),本刊编辑部(校)   

  1. 1.俄罗斯科学院石油及天然气问题研究所;
    2.俄罗斯海洋学研究所; 中国石油石油经济和信息研究中心,北京 100083
  • 收稿日期:2003-02-28 发布日期:2020-09-21
  • 作者简介:任俞(1933-),女,江苏宜兴人,教授级高级工程师,石油地球物理勘探。联系电话:010-62009368.

The Serpentinite in Oceanic Crust-Source Rock

А.Н. Дмитриевский, И.Е. Баланюк, О.Г. Сорхтин, А.Ш. Донгарян, REN Yu   

  • Received:2003-02-28 Published:2020-09-21

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摘要： 介绍了用含有溶解二氧化碳的海水对大洋岩心进行水解的过程。结果表明,此水解过程可导致生成非生物成因的甲烷和氢。在含铁超基性岩的蛇纹岩化作用过程中,通过二价铁氧化为三价铁、二氧化碳还原,可以生成大量的甲烷。同时,海水经二价铁的分解,释放出氢。大洋岩石中甲烷的生成速度可达9×106t/a,氢的生成速度达9.7×106t/a.其中,大量的甲烷和氢因细菌的作用而发生酸化,除一部分气体散布到大气中之外,其余以热液或天然气水合物形式在大洋中储(沉)积下来。

关键词: 大洋地壳, 蛇纹岩, 生油层, 天然气, 水合物

Abstract: The processes of hydration of oceanic core rocks by ocean water containing a dissloved carbon dioxide are considered in the article. It is shown, that these processes lead to generation of abiogenous methane and hydrogen. The greater amount of methane is derivated during the process of serpentinization of ferruginous ultrabasite rocks at the expense of oxidizing divalent iron up to its tribalen state and restoring of carbon dioxide up to methane. Thus hydrogen is released owing to dissociations of ocean water on dibalent iron. The generation rate of methane in the oceanic core reaches 9 million t/year, and hydrogen 9.7 t/year. The considerable part of methane and hydrogen acidifies by bacteria, occupy ing hydrotherms, or is saved as gas hydrates in ocean sediments, but the essential part of these gases is allocated in the atmosphere.

Key words: oceanic crust, serpentinite, source bed, natural gas, hydrate

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