石油与天然气地质 ›› 1983, Vol. 4 ›› Issue (3): 294-303.doi: 10.11743/ogg19830306

• 论文 • 上一篇    下一篇

中国东部新生代断陷盆地地层岩性油气圈闭的地震反射特征

蔺殿忠, 童晓光, 徐树宝   

  1. 北京石油勘探开发科学研究院
  • 收稿日期:1982-09-02 出版日期:1983-09-25 发布日期:2012-01-16

CHARACTERISTICS OF SEISMIC REFLECTION INRELATION TO LITHO-STRATIGRAPHIC TRAPS IN THE CENOZOIC FAULT BASINS IN EAST CHINA

Lin Dianzhong, Tong Xiaoguang, Xu Shubao   

  1. Scientific Research Institute of Petroleum Exploration and Development, Beijing
  • Received:1982-09-02 Online:1983-09-25 Published:2012-01-16

摘要:

中国东部广泛发育着第三纪的陆源碎屑沉积断陷盆地,如渤海湾、苏北、南襄等盆地。这些较大的含油气盆地都已作了大量地震勘探和钻探工作,获得了丰富的地球物理和地质资料,发现了多种类型的油气藏。 在盆地勘探的初期阶段,主要是寻找构造油气藏。随着勘探程度的加深,一些非构造油气藏主要是地层、岩性油气藏,也不断被发现。到现阶段,进一步作油气勘探就更要有意识地去寻找非构造油气藏了。更有实际意义的是,在中国东部还发育有众多的小型断陷盆地,它们常常缺乏明显的构造圈闭,控制油气聚集的主要是地层、岩性圈闭。因此,在这些盆地内找油,一开始就应把着眼点放在地层、岩性圈闭上。

Abstract:

Several unconformities are found within Tertiary fault basins in East China,forming various kinds of litho-stratigraphic traps in combination with various sand bodies developed along the unconformities. These traps are both obviously related to unconformities and controlled by various kinds of sand bodies. The utilization of seismic survey is well known for determining overlap and denudation surface. Therefore,after describing the geological setting of the formation of these litho-stratigraphic traps,emphasis is placed in this article on the geological properties of some main kinds of sand bodies,such as alluvial cones and subaqueous fans,lacustrine turbidites,deltic and subaqueous channel sands. Besides,large amount of seismic exploration examples are used to show their relative properties of seismic reflection. It is suggested that these sand bodies can be identified by recognizing the seismic reflection features so as to discover various kinds of subtle pools.