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建立速度分布模型是叠前深度偏移方法中的关键技术。本大综述了这一技术的发展现状；阐明了通过叠前深度偏移建立速度模型和在叠前深度偏移中应用速度模型的基本概念；探讨了剩余速度分析中的陷阱；实现了沿层定点实时交互建立速度分布模型的功能。文章最后以实际数据为例，展示了该技术的运算效率和应用效果。
Establishing velocity distribution model is the key technology in prestack depth migration method. In this paper, the development status of this technology is reviewed. The basic concepts of velocity model through prestack depth migration and velocity model in prestack depth migration are clarified. Traps in residual velocity analysis are discussed. Fixed-point interactive real-time establishment of speed distribution model functions. Finally, the article takes the actual data as an example to show the computing efficiency and application effect of the technology.