【摘要】 应用三维叠前深度偏移成像技术,对复杂地区的地震资料进行了三维叠前深度偏移处理,取得了良好的效果。其主要实现过程是:在时间剖面上拾取速度层位,建立时间模型;用相干反演法和叠加速度反演法相结合逐层求取层速度,建立层速度—深度地质模型;用剩余速度分析修改和优化地质模型;选用Kirchhoff积分法或差分法实现三维叠前深度偏移。更多还原

【Abstract】 D prestack depth migration technique has been applied for processing of 3D prestack depth migration to some complex areas, and the results are satisfactory. The main steps can be described as follows: 1) develop time model by picking up velocity horizons in time section; 2) develop interval-depth model by interval velocities layer by layer obtained by coherent inversion and stacking velocity inversion methods; 3) optimize the geologic model by residual velocity analysis, and 4) achieve 3D prestack depth migration by using Kirchhoff integral method or finite differential method.更多还原