石油与天然气地质 ›› 1991, Vol. 12 ›› Issue (2): 153-160.doi: 10.11743/ogg19910207

• 论文 • 上一篇    下一篇

不同条件下天然气运移影响的模拟实验研究

卢家烂, 傅家谟, 张惠之, 刘德汉   

  1. 中国科学院地球化学研究所, 广州
  • 收稿日期:1990-12-20 出版日期:1991-06-25 发布日期:2012-01-16

STUDY ON SIMUUTION OF NATURAL GAS MIGRATION IN DIFFERENT CONDITIONS

Lu Jialan, Fu Jiamo, Zhang Huizhi, Liu Dehan   

  1. Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou
  • Received:1990-12-20 Online:1991-06-25 Published:2012-01-16

PDF (PC)

1012

被引次数

34

摘要：

天然气在各种不同压实程度的矿物介质中的运移特征的模拟实验结果表明:在粘土岩和碳酸盐岩中,运移速度随压实程度的增加而减小;但在石英砂岩中,压实程度对运移速度的影响较小。实验结果还表明:天然气在碳酸盐岩和粘土岩中运移时,矿物基质对不同分子量的气态烃具有不同的保留能力,轻组分较重组分的运移速度快,长距离的运移可使天然气变成干气。

关键词: 压实作用, 天然气, 油气运移, 模拟实验

Abstract:

Simulation experimental result shows that the rate of natural gas migration decreases with the increase of compaction extent in carbonate or clay rocks. But in quartz sandstone, compaction extent has less effect on migration rate, high rate of migration which is 700 times as it in clay rocks was obtained even if in burial depth of 5000m (equal to 1300kg/cm2). The experimental result also indicates that, during migration of natural gas in carbonate or clay rocks, mineral matrices have different retaining abilities for gaseous hydrocarbons with different molecular weight. That is, C1 and C2 have the highest migration rate, and the ratio of C1/ΣC1-C5 is not only related to the type of organic matter, but also to the migration distance of natural gas. Long distance migration may make it into dry gas.