基于高阶Radon域的同时震源波场分离

Simultaneous source separation in high order Radon domain

同时震源技术是近几年勘探地球物理领域一个热点问题,该技术可以提高野外采集效率,改善偏移成像质量。同时震源数据处理的关键在于将混合的炮记录进行分离。该方法基于稀疏约束反演的基本原理,利用共检波点域主炮数据相干,辅炮数据不相干的特性,将共检波点域数据转换到高阶Radon域进行稀疏表示,然后在Radon域利用阈值进行约束实现反演分离。三个模型的测算结果均获得了较好的分离结果,验证了稀疏域选取的合理性以及反演方法的准确性。

Since simultaneous source technology can enhance the acquisition efficiency and improves the quality of seismic data, it has been a hot issue in exploration geophysics recent years. The key point for simultaneous source processing is to separate the blended seismic data. We formulated the forward modeling in the common receiver domain, in which one source is coherent and incoherent for others. For this character, we transform the common receiver seismic data into Radon domain, then use shaping regularization to constrain the model, and iteration is designed for optimization. Ideal results from our model tests show that our method performs better in both efficiency and accuracy.