双曲Radon变换参数分析

为避免双曲Radon变换在消除多次波和提取速度差异的过程中出现假频现象,对地震资料处理造成一定的影响。笔者在时间域对最小二乘双曲Radon变换中的曲率参数和最小二乘迭代次数进行了研究,计算出平衡准确度和计算量的最佳参数选取范围为,曲率参数在30~40之间,迭代次数在6~10之间。理论模型测试和实际资料处理结果表明,适当的参数选取能够在保证准确度的同时极大减小计算量,有利于双曲Radon变换的实际应用。

Analysis of parameters in hyperbolic Radon transform

In order to avoid the pseudo-frequency in the process of eliminating multiples and extracting velocity difference of hyperbolic Radon transform, which caused certain impacts on seismic data processing, the authors studied the curvature parameters and iteration numbers of least square hyperbolic Radon transform in time domain and figured out the optimum range of the parameter of 30 to 40 for curvature sampling and 6 to 10 for the iteration numbers. Synthetic model and real data tests show that proper setting of parameters could ensure the accuracy and reduce the computing time, which is beneficial for the application of hyperbolic Radon transform.