采用分步傅里叶频率波数域法对地震波场进行延拓，实现了复杂碳酸盐岩礁滩相储层地质模型的地震波场数值模拟，得到了合理的正演地震记录和偏移图像，并总结了地震响应特征。结果表明，该方法计算效率高、精度高、稳定性好，能适应大倾角和速度纵横向任意变化，是一种较好的地震波场模拟算法。

The wave field continuation is executed in frequency and wave-number domain through split-step Fourier algorithm. The numerical simulation of seismic wave field corresponding to complex carbonate reef and bank reservoir is carried out. The results of forward seismic record and migration image are reasonable. The seismic response characteristics are concluded. It proves that the algorithm is quite efficient, accurate and steady, and it is not restricted on layer dip angle and horizontal and vertical changes ofmedium velocity. It is a relatively available seismic wave field numerical simulation algorithm.