叠前深度偏移在很长一段时间内被认为是一种特殊处理,只试用于横向速度变化剧烈的极少数情况。时至今日,由于成本高、周期长、方法原理深奥难解以及结果的不可预测性,它仍不能应用于三维数据。然而,这些经济学正在发生很快的变化,出现一种全新的局面。回答诸如“何时做三维叠前偏移有经济意义?”或“我们如何知道处理的效果改进了多少?”的问题需要 Prestack depth migration was considered a special treatment for a long time and was only tried in the rare cases where the lateral velocity changes drastically. Today, it still can not be applied to three-dimensional data due to its high cost, long period, profound and inhomogeneous methodological principles and unpredictable results. However, these economics are undergoing rapid changes and a completely new situation has emerged. Questions such as “When does it make sense to do 3D prestack offset?” Or “How do we know how much improvement has been made?”