石油与天然气地质 ›› 1995, Vol. 16 ›› Issue (4): 324-330.doi: 10.11743/ogg19950405

• 论文 • 上一篇    下一篇

二连盆地吉尔嘎朗图凹陷稠油成因

窦立荣, 杨涛   

  1. 北京石油勘探开发科学研究院, 北京, 100083
  • 收稿日期:1993-08-07 修回日期:1995-08-07 出版日期:1995-12-25 发布日期:2012-01-16

ORIGIN OF HEAVY OILS AT JIRGALANGTU DEPRESSION OF ERLIAN BASIN

Don Lirong, Yang Tao   

  1. Scientific Research Institute of Petroleum Exploration and Development, CNPC, Beijing
  • Received:1993-08-07 Revised:1995-08-07 Online:1995-12-25 Published:2012-01-16

PDF (PC)

658

被引次数

12

摘要：

吉尔嘎朗图凹陷位于二连盆地乌尼特坳陷西南端,为一北东走向,北断南超型凹陷,是早期沉陷、后期抬升的单旋回断陷。断陷内存在两种成因稠油:原生稠油和次生生物降解稠油。它们的形成机理和地质地化特征不同。原油的地化分析表明,吉尔嘎朗图凹陷西南斜坡区稠油藏是轻度-中度降解的低熟稠油。

关键词: 二连盆地, 吉尔嘎朗图凹陷, 稠油成因, 生物降解稠油, 微量金属元素, 降解序列

Abstract:

Jiralangtu Depression is located at the southwestern part of the Wunit subbasin, Erlian Basin. It is a NE-trending half-graben with a fault belt in the north side and an overlap in the south side. The depression subsided in the early stage and uplifted in the late stage. Two kinds of genetic heavy oils could be found within the depression such as primary heavy oil and biodegraded heavy oil. Each of them has its own formative mechanism and geochemical features. Geochemical analysis of the crude oils shows that the heavy oil pools distributed along the southwestern slope of the Jirgalangtu Depression contain slightly-intermediately biodegraded immature heavy oils.