用于复杂地质构造成像的地震数据深度偏移正在变得越来越常规。但是,在某些情况下,得到的深度剖面质量比设想的差。一个典型的例子是盐丘成像。陡倾盐丘侧翼的地震同相轴通常是断裂模糊的,并且难于解释。本文指出了导致这种成像问题的一种原因,同时提出一种我们称作控制叠加的解决办法。方法的核心是进行分选和叠加,在得到最终深度剖面前,正确切除叠前深度偏移的局部图像。 Depth migration of seismic data for complex geological formations is becoming more and more conventional. However, in some cases, the depth profile obtained is worse than assumed. A typical example is salt dome imaging. The seismic events flanking a steep salt dome are generally faulty and difficult to interpret. This article points out one reason for this imaging problem, and at the same time suggests a solution we call control overlay. The core of the method is to sort and superimpose the partial images of the prestack depth migration correctly before the final depth profile is obtained.