:在将内陆凹陷和海盆作大致类比的前提下 ,运用测井、岩心和露头层序地层学的一般原理 ,在研究层段识别出 4个下切性层序界面。界面的主体部分常是岩相突变面、岩相转换面或仅从冲积地层内部穿过。河口附近的下切深度大致等于下切期间湖水面下降幅度减去基底沉降幅度之差。由此可粗略证明 ,东营凹陷始新统和渐新统间的界面是在基底沉降速率大致为 0的条件下仅由湖水面下降所形成。湖进面和最大湖泛面可按层序发育原理鉴别 ,由于湖水面常大起大落 ,因而最大湖泛面和高位体系域很容易被后继层序界面的形成作用所清除。湖盆与海盆的重要区别是它狭小、封闭 ,因而至少在基底沉降缓慢、供屑速率较高的层序发育期 ,很可能没有典型凝聚层形成。 : Using the general principles of well logging, core and outcrop sequence stratigraphy, the four undercutting sequence boundaries are identified in the research interval on the premise of roughly inland sag and basin. The main part of the interface is often metamorphic facies, lithofacies conversion surface or only from within the alluvial formation through. The depth of the cut near the estuary is approximately equal to the difference between the drop in the lake surface during the cut and the base settlement. From this, it can be roughly proved that the interface between the Eocene and Oligocene of Dongying Depression is formed only by the descent of the lake surface under the condition that the basement sedimentation rate is almost zero. The lake surface and the largest lake flooding surface can be identified according to the sequence development principle. Because the lake surface often rises and falls greatly, the largest lake flooding surface and highstand system tract can be easily cleared by the formation of subsequent sequence boundaries. The key difference between a lake basin and a basin is its narrowness and confinement, which is likely to result in the absence of a typical coalescence layer, at least during the sequence of sedimentary basins with slow sedimentation and high chip rate.