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类似于局部倾斜叠加并由其导出的波束叠加是根据波的传播方向来选择数据的。其目的是用层析成象的方法由波束叠后资料估算速度函数的低波数分量。速度估算不要求拾取资料而是通过搜索目标函数(测定什么样的速度模型预测波束叠后资料)的最大值来求解。在合成资料反野外资料上,用反演方法估算水平层状介质的速度函数是成功的。简单的反演结果表明,进一步的研究方向为二维速度估算方法的应用。
The beam superposition, similar to the local oblique superposition and derived therefrom, selects the data according to the direction of propagation of the wave. Its purpose is to estimate the low wavenumber component of the velocity function from the post-stack data using tomographic imaging. The speed estimate does not require picking up the data but rather by searching for the maximum of the objective function that determines what speed model predicts the beam stack data. In the synthetic data of anti-field data, using the inversion method to estimate the velocity function of horizontal layered media is successful. The simple inversion results show that the further research direction is the application of two-dimensional velocity estimation method.