复杂地表波动方程反演延拓静校正

静校正问题是复杂地表地区地震勘探所面临的一个主要问题，它在很大程度上制约着资料处理的质量。本文在已知表层速度模型的基础上，研究了一种利用波动方程反演的静校正方法，即通过理论推导将静校正问题归结为一个求波动方程边值的反问题(亦称未知边值的反问题)，换句话说，复杂地表的静校正问题可通过波动方程边值反演来实现。文中针对反问题的特点给出了数值求解方法。这种静校正方法具有适应复杂地表起伏及表层速度变化剧烈的特点，可以充分考虑波场通过表层时所发生的透射、散射及反射，使延拓的波场具有较高的精度。数值模拟结果验证了方法的有效性。

Static corrections by continuation of wave-equation inversion in complex near-surface.

Static correction is one of key issues that the seismic exploration faced with in complex near-surface, that constrained the quality of data processing to a considerable degree. On the basis of knowing near-surface velocity model, the paper studied the method of static corrections by using wave-equation inversion, that is , summing static corrections up as the inversion of wave-equation boundary values (also called as inversion of unknown boundary values ) . In other words, the static corrections in complex near-surface can be realized by inversion of wave-equation boundary values. The paper give numeric solved method in view of the characters of inversion. The static corrections method is characterized by adaptation to complex surface relief and rapid near-surface velocity change and can fully consider the transmission,dispersion and reflection appeared when wavefield goes through the nearsurface , which made the continued wavefield have higher precision. The numeric modeling results proved the effectiveness of the method.