石油与天然气地质 ›› 2007, Vol. 28 ›› Issue (4): 441-448.doi: 10.11743/ogg20070401

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对大庆油田深层气田气源的讨论

郭占谦1, 刘俊峰2, 李贵顺1   

  1. 1. 中国石油, 大庆油田有限公司, 勘探开发研究院, 黑龙江, 大庆, 163712;
    2. 中国地质大学, 北京, 100083
  • 收稿日期:2007-06-08 出版日期:2007-08-25 发布日期:2012-01-16

A discussion on gas sources in deep gas fields,Daqing oil field

Guo Zhanqian1, Liu Junfeng2, Li Guishun1   

  1. 1. Exploration and Development Research Institute, Petro China Daqing Oil Company, Daqing, Helongjiang 163712;
    2. China University of Geosciences, Beijing 100083
  • Received:2007-06-08 Online:2007-08-25 Published:2012-01-16

摘要:

大庆油区三肇凹陷发现了不少中小型气田,分析其来源有无机成因与有机成因两大类;分析其组成也有烷烃气与非烃气两大类。在非烃气中有二氧化碳、氢气、氮气等常规非烃气体,也有号称惰性气体的稀有气体。在稀有气体中除有常见的氦、氩气体外,还发现有不常见的氖气。根据"稀有气体、稀土元素与某些元素的同位素,可以追踪油气与金属矿床的物质来源、运移机制与富集规律"的原理,分析烃气、非烃气及稀有气体的同位素后发现,烃气与非烃气的来源大多数为地球深部的无机成因气。不仅在勘探区内有所发现,在已开发的大庆油田内近几年来也发现非烃气随伴生气的增加而增加,其同位素地球化学特征也反映为无机成因,与原油的成因完全不同。

关键词: 天然气, 气源, 无机成因, 大庆油田

Abstract:

Sanzhao sag in Daqing oil region is found to contain many small-to middle-sized gas fields.Analysis shows that there are gas of both inorganic and organic origins and the natural gas is composed of both alkane and non-hydrocarbon gases.The later contains not only conventional non-hydrocarbon gases like carbon dioxide,hydrogen,nitrogen,and etc,but also rare gases,such as helium,argon,and even neon.Rare gases,rare-earth elements,and isotopes of some elements,can be used to determine the sources,migration mechanisms,and enrichment patterns of hydrocarbons and metal deposits.By applying this principle to the analysis of hydrocarbon gases,non-hydrocarbon gases and the isotopes of rare gases,both the hydrocarbon gases and non-hydrocarbon gases are determined to be mainly inorganic gases sourced from the deep of the earth.They occur both in the exploration area and in the developed oilfields.In recent years,Daqing Oilfield has witnessed an increase of non-hydrocarbon gases with higher production of associated gas.In addition,the geochemical behaviors of these gases also indicate an inorganic origin,quite different from that of crude.

Key words: natural gas, source, inorganic origin, Daqing oil region

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