石油与天然气地质 ›› 2002, Vol. 23 ›› Issue (3): 207-211.doi: 10.11743/ogg20020302

• 前沿探索 • 上一篇    下一篇

流体包裹体在古压力模拟研究中的应用

陈红汉1, 董伟良2, 张树林1, 杨计海2   

  1. 1. 中国地质大学, 湖北武汉, 430074;
    2. 南海西部石油公司, 广东湛江, 524057
  • 收稿日期:2002-03-12 出版日期:2002-09-25 发布日期:2012-01-16
  • 基金项目:

    国家自然科学基金 (NO.49572126);国家“九五”攻关项目 (99-110-05-02-01)联合资助

APPLICATION OF FLUID INCLUSION IN PALAEOPRESSURE MODELLING RESEARCH

Chen Honghan1, Dong Weiliang2, Zhang Shulin1, Yang Jihai2   

  1. 1. China University of Geosciences, Wuhan;
    2. Nanhai Western Oil Company, Zhanjiang, Guangdong
  • Received:2002-03-12 Online:2002-09-25 Published:2012-01-16

摘要:

烃类流体包裹体的最小捕获压力可以通过其在P-T空间投影的等容线单值变化和等容线的物理特性来确定。南海琼东南盆地YC21-1构造崖城组砂岩中的方解石脉、石英次生加大边和颗粒裂纹中的流体包裹体反映,地史时期该区曾经发育过 4期流体包裹体,盖层在第三期热流体活动时期,曾发生过破裂,但稍后又快速愈合,从而未形成大量游离型天然气藏。

关键词: 流体包裹体, 古压力, 等容线, 盖层破裂, 琼东南

Abstract:

The minimum trapping pressure ratio of hydrocarbon fluid inclusions can be defined by their isochore single value variations in P-T space projection and physical property of their isochore. Calcite veins, quartz secondary enlarged margins and fluid inclusions in particle cracks in sandstones of Yancheng Formation of YC21-1 structure in Qiongdongnan(southeastern Hainan) basin of the South China Sea indicate in geologic history that four phases of fluid inclusions were developed in that region; the capping bed was once burst during the third mobile phase of thermo-fluid inclusions which would be healed soon after. Therefore, no many free-state natural gas reservoirs could be formed there.

Key words: fluid inclusion, palaeopressure, isochore, capping bed burst, Qiongdongnan

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