强横向变速和陡倾角介质的成像问题是地震偏移成像的难点。本文在频率-空间域利用有限差分高阶分裂法求解任意广角波动方程实现了地震偏移成像。试验表明,参考速度的选取是影响成像精度的关键因素。脉冲响应测试表明通过优化参数任意广角波动方程能够以较低阶的方程获得较大的偏移角度。Marmousi模型数据叠前深度偏移试验表明,该方法能够适应强横向变速和陡倾角地质结构的成像,参数优化后能够取得更好的成像效果。 The imaging problems of strong lateral speed change and steep media are the difficulties of seismic migration imaging. In this paper, we use the finite difference high-order splitting method to solve arbitrary wide-angle wave equation in the frequency-space domain to realize the seismic migration imaging. Experiments show that the selection of reference speed is the key factor affecting the imaging accuracy. Impulse response tests show that the larger offset angle can be obtained with the lower-order equation by optimizing any arbitrary wide-angle wave equation. The prestack depth migration test of Marmousi model data shows that this method can adapt to the imaging of strong lateral speed change and steep dip geological structure, and the optimized parameters can achieve better imaging results.