三维叠前深度偏移速度模型建立方法

在众多的地震资料偏移成像方法中，三维叠前深度偏移归位最精确的偏移方法，而速度模型则是直接影响偏移质量及效果的关键因素，针对三维叠前深度偏移处理，本文提出一套三维叠前深度偏移速度模型建立方法，该方法以叠前深度移为基础进行偏移速度和层速度分析，对速度模型的层位结构及速度纵、横向变化、采用三维可视化监控和交互方式修改，可有效地建立三维速度模型，为三维叠前深度偏移提供高的三维速度场。经实际三维资料处理证明

Velocity model construction methods for 3-D prestack depth migration

In various seismic data migration and imaging methods , 3-D prestack depth migration isthe mtist precise homing method, in which the velocity model is 1he key factor of affecting the qualityand result of migration and imaging. This paper gives a set of migration velocity model cnnstructionmethods. For the layer structure of velocity model and spatial change of velocity field, 3-D visualizalionand interactivenoo are deployed as monitoring and modifying means.The methods can provide high-precision 3-D velocity field for prestack depth migration . Actual 3-D data processing results prove its ef-fectiveness .