通过考虑时间偏移后深度模型的脉冲响应,分析了存在横向速度变化时时间偏移引起的同相轴定位误差。通过考察这种脉冲响应,我们完成了能将时间偏移与深度偏移连系起来的补救性偏移算子的基础性工作。由Black和Brzostowskj提出的简单理论预测了零偏移距时间偏移对V(x,z)介质中点绕射层的响应.该响应是一个特殊的羽状尖形曲线。我们用几 By considering the impulse response of the depth model after the time migration, the errors of the positioning of the events caused by the time migration in the presence of lateral velocity changes are analyzed. By examining this impulse response, we have completed the basic work of remedial offset operators that can correlate time and depth offsets. The simple theory proposed by Black and Brzostowskj predicts the response of a zero-offset time shift to a point-diffraction layer in a V (x, z) medium, which is a special pinnacle curve. We use a few