石油与天然气地质 ›› 1993, Vol. 14 ›› Issue (3): 200-206.doi: 10.11743/ogg19930304

• 论文 • 上一篇    下一篇

生长逆断层与油气生成、运移和聚集——以柴达木盆地尕斯断陷为例

邹华耀1, 胡文义2   

  1. 1. 江汉石油学院 湖北 江陵434102;
    2. 青海石油勘探开发研究院 甘肃 敦煌736202
  • 收稿日期:1992-05-30 修回日期:1992-02-10 出版日期:1993-09-25 发布日期:2012-01-16

GROWTH THRUSTS AND OIL GENERATION,MIGRATION AND ACCUMULATION:TAKING GASI FAULT-SUBSIDENCE IN QAIDAM BASIN AS AN EXAMPLE

Zhou Huayao1, Hu Wenyi2   

  1. 1. Jianghan Petroleum Institute, Jiangling, Hubei;
    2. Qinghai Research Institute of Petroleum Exploration and Development, Dunhuang, Cansu
  • Received:1992-05-30 Revised:1992-02-10 Online:1993-09-25 Published:2012-01-16

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摘要：

尕斯断陷第三系由于生长逆断层发育,形成了以牵引背斜、生长背斜和断鼻构造为主要类型的圈闭。断层下盘生油岩比上盘的成熟度和转化率高、过剩孔隙流体压力大且储层物性优;断层又是油气运移的通道。生长逆断层为油气生、储、运、聚的良好配置提供了地质基础。

关键词: 生长逆断层, 柴达木盆地, 尕斯断陷, 牵引背斜, 生长背斜, 有机质成熟度, 过剩孔隙流体压力, 油气运移, 石油聚集

Abstract:

Growth thrusts that were widespread in Tertiary deposits of Gasi fault subsidence in Qaidam Basin controlled the structural framework of the three main kinds of structures,and formed growth anticlines,drag anticlines and fault nozes.The tectonic evolution pro-cess could be divided into formation stage,growth stage and stagnation stage.As for the source rocks,that in the footwall of the thrust are characterized by high maturity and transformation ratio of organic matter,high oil saturation and excess pore-fluid pressures.The growth thrusts might act as the passage path for hydrocarbon migration.The growth structural traps derived from the thrusts generally have following favourable conditions:1.close to oil source,especially the growth anticlines which usually form hydrocarbon pools of lower formation generated-upper formation reserved type;2.long time and multi-stage of hydrocarbon supply due to early formed traps;3.abundance of oil source and multi-layer of oil supply.