地表高程剧烈起伏,近地表风化层速度与厚度横向剧烈变化导致山地资料出现严重的静校正问题,而被广泛应用的基于地表一致性假设的常规静校正技术已经不能很好解决这类问题,故提出了一种新方法.用初至走时层析反演出近地表速度场,傅氏变换二维或者三维波动方程的时间项;采用泰勒级数展开利用高阶有限差分法求解波场,实现波动方程延拓静校正,完成了非地表一致性静校正处理,从而突破了常规静校正方法的地表一致性假设条件限制.通过2D模型数据和3D实际地震数据应用,证明了在复杂地表情况下波场延拓静校正技术比常规静校正技术效果更好.%Due to the sharp fluctuation of surface elevation,the drastic changes of the velocity and thickness of near-surface weathered layer result in serious static correction problem in mountain data.However,the widely used conventional static correction technique based on surface consistent assumption can not solve such problems,so a new method was proposed.In this paper,the near surface ve-locity field was completed by first arrival travel time tomography,and the time series of two or three dimensional wave equations in Fou-rier transform,then using the higher order finite difference method for solving the wave field after Taylor series expansion,the wavefield continuation datuming static correction has been completed,the non surface consistent static correction was realized,thus breaking the surface consistency hypothesis limit of the conventional static correction method.Through the application of 2D model data and 3D seis-mic data,it was proved that the static correction technique of wavefield continuation was better than conventional static correction under complicated surface conditions.
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