石油与天然气地质 ›› 1982, Vol. 3 ›› Issue (2): 149-157.doi: 10.11743/ogg19820206

• 论文 • 上一篇    下一篇

略论辽河西部凹陷油气藏类型及其分布规律

吴振林   

  1. 辽河石油勘探局
  • 收稿日期:1981-05-25 出版日期:1982-06-25 发布日期:2012-01-16

A BRIEF DISCUSSION ON OIL AND GAS POOLS IN WESTERN LIAOHE DEPRESSION AND THEIR REGULARITIES OF DISTRIBUTION

Wu Zhenlin   

  1. Liaohe Bureau of Petroleum Exploration
  • Received:1981-05-25 Online:1982-06-25 Published:2012-01-16

摘要:

辽河西部凹陷已进行了十余年勘探,证明是一个油气富集区,探明的地质储量比辽河断陷另二个凹陷高7—10倍,占该断陷探明地质总储量的82%;如按单位面积计算,其探明地质储量应列入国内最富凹陷之中。西部凹陷下第三系最大厚度达5000—6000米,具有多套油气层和多种类型的储集层,构成多样的油气藏类型。

Abstract:

The western Liaohe depression began its developing at Oligocene and kept on sinking ever since.Now,the thickness of sediments with abundant organic matters reaches 5,000—6,000m.Because of the later Tertiary fracturings and foldings resulting from the progressive warping and epigenetic tectonic movements,sequences of source rocks and varieties of traps favourable to oil and gas generation and accumulation were formed.Four catigories of oil and gas pools are found,which are subdivided into nine types of different traps,such as:1).tectonic pools,including a).anticline;b).faulting blocks;and c).faulted structural noses;2).stratigraphycal pools,including d).overlaps;and e).uncomformities;3).basement pools,including f).latent ridges;and g).uncomformities of base-ment;and 4).lithological pools,including h).lenticular sandstones;and i).pinched layers.All these pools are regularly distributed in different parts,superimposing each other.They can be summarized as two series of oil and gas pools:1).anticlinal series and 2).slope series.They can be used as models for arranging exploration and appointing places favourable to oil and gas searching.The depression appears in shape of dustpan.Therefore,the oil and gas traps were formed in direction from margin to centre;whereas maturation of oil and gas began from central parts towards margin.This kind of relationship between tectonic and oil generation processes implies certain regularities of special distribution of oil and gas pools and can lead to discovering of possible pools in some places else.