石油与天然气地质 ›› 1986, Vol. 7 ›› Issue (3): 256-260.doi: 10.11743/ogg19860309

• 论文 • 上一篇    下一篇

华北地区煤成气碳同位素资料初析

周兴太   

  1. 华北石油地质局地质研究大队
  • 收稿日期:1985-06-19 修回日期:1986-02-14 出版日期:1986-09-25 发布日期:2012-01-16

PRELIMINARY APPROACH OF CARBON ISOTOPE DATA OF COAL-FORMED GAS IN NORTH CHINA

Zhou Xingtai   

  1. Research Institute of Geology, Huabei Bureau of Petroleum Geology
  • Received:1985-06-19 Revised:1986-02-14 Online:1986-09-25 Published:2012-01-16

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摘要：

在利用δ13C 值判断天然气的成因类型时,必须考虑具体地质情况。华北地区的天然气:若δ13C1值小于-55‰,既可能是生物气,也可能是煤田气;若δ13C1值在-35‰至-45‰之间,则属沙河街组生成的气的可能性较大;若δ13C1值大于-40‰,则有属石炭二叠纪煤系气的可能。

Abstract:

A preliminary approach is made on the genetic types of the gases in North China based on the carbon isotope data and geological data.It is suggested that natural gas with δ13C-value less than -55‰ is generally biogenic gas or gasgenerated from coal seam;the one with δ13C-value ranging from -35‰ to 45‰is generally derived from humic-saproplic kerogens of the Tertiary;while theone whose δ13C-value is greater than -40‰ is mainly generated from coal mea-sures(including coal seams and carbonaceous shales)of the Permo-Carboni-ferous.