网格层析和高斯束偏移在深度域速度建模中的应用

Application of the grid tomography and Gauss beam migration in velocity modelling in the depth domain

叠前深度偏移成像质量取决于深度域速度模型的精度以及偏移方法的选择。结合目前速度反演和深度偏移方法的特点,联合应用网格层析反演和压缩高斯束偏移技术在深度域反演偏移速度模型,在提高速度模型精度的同时,可以极大地提高速度模型优化的效率。该方法在实际数据的成像处理中取得了较好的效果。

The imaging quality of prestack depth migration depends on the accuracy of velocity model and the choice of migration methods.According to characteristics of current velocity inversions and depth migration methods,the combination of the grid tomography inversion and the compressed Gauss beam migration can improve not only the accuracy of velocity model,but also greatly improve the efficiency of velocity model optimization.The proposed approach has achieved good results in seismic data imaging.