石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (3): 272-279.doi: 10.11743/ogg19850308

• 论文 • 上一篇    下一篇

东濮凹陷煤成气地化指标及其与油成气的对比

朱家蔚, 许化政   

  1. 中原油田勘探开发研究院
  • 收稿日期:1984-07-26 出版日期:1985-09-25 发布日期:2012-01-16

GEOCHEMICAL INDEX OF COAL-FORMED GAS IN DONGPU DEPRESSION IN COMPARISON WITH THAT OF IIL FIELD GAS

Zhu Jiawei, Xu Huazheng   

  1. Research Institute of Petroleum Exploration and Development, Zhongyuan Oilfield
  • Received:1984-07-26 Online:1985-09-25 Published:2012-01-16

PDF (PC)

802

被引次数

34

摘要：

对于多气源的沉积盆地来说,如何鉴别煤成气与油成气,是一个急待解决的问题。文留煤成气藏发现后,我们多途径研究了该气藏中天然气和凝析油的各项地化指标,发现这些指标与下第三系油成气有明显差别。利用这些差别,可鉴别各天然气藏的成因类型,并指出煤成气与油成气勘探的有利地区和有利部位。

Abstract:

The natural gas of Wenliu gas pool in Dongpu depression,Henan Provin-ce,is considered to be originated from coal series of Permo-Carboniferous.The reservoir rocks are Lower Tertiary sediments.Methane contents of the gas is 95.12%,the ratio of C2-4 alkane to C1-4 alkane is 3.84%,condensate is22.98g/m3.The average value of Ar40/Ar38 is 1,231,much greater than thatof oil field gas in the same system of this same depression(441 for the oil-field gas)whereas δ13C-average value of methane is -28.16‰,which is 12.86‰ higher than that of the above mentioned oilfield gas,δD value is -182‰,Hg is 5.11×104ng/m3.δ13C-value of the accompanying condensate is -24.5‰,while paraffin in-dex is 8.09,heptane value 41.76%,benzene 11.04%,methylbenzene 5.94% and its peak carbon mumber is C11 or C13,Pr/Ph is 0.77.