Abstract: In the light of data of transit time-depth curves,this paper discusses the chara-cteristics of distribution of the anomalous compaction zones in the Dongying sag,on the basis of which the conditions of primary migration in the area are examined.It is proposed that the effective source bed in the sag is the third member of Eogene Shahejie formation,the middle and lower parts of which are more widely distributed than the upper.Their main stages of hydrocarbon expulsions are Guantao-Quaterary period and Minghuazhen-Quaterary period respectively.The direction of primary migration is mainly from the centre of source area toward the margin of the sag laterally,especially to the northeast,and upward vertically.Generally,the vertical distance is not more than 600 meters over the tops of the anomalous compaction zones.From the above-mentioned conditions of primary migration,some prospective areas are suggested.

摘要： 本文以东营凹陷泥岩声波时差-深度曲线为根据,探讨了该区异常压实带的分布特征.并进一步分析了东营凹陷初次运移条件.提出东营凹陷有效生油层为老第三系沙河街组第三段,它们的主要排烃期分别为馆陶～第四系与明化镇～第四系沉积时期.初次运移的方向在平面上主要自生油中心向凹陷周缘,特别是向东北绿.距离一般不超越异常压实带顶界以上600米.

关键词: 东营凹陷, 异常压实, 声波时差, 有效生油层, 油气初次运移, 沙三中, 问题探讨, 压实作用, 泥岩压实, 深度曲线