基于同相轴追踪的三维地震资料多次波压制方法

3D multiple suppression based on event tracing

提出了一种基于同相轴追踪的三维多次波压制方法,在引入三维高分辨率叠加速度谱的基础上,进行多次波同相轴的高精度追踪,并将追踪到的多次波同相轴组成准多次波记录,然后利用f-k滤波方法实现在多次波同相轴所属短时窗内的多次波压制。模型实验和实际数据测试均表明,该方法的多次波剔除效果明显优于高精度抛物线Radon变换法,并且其计算效率也明显高于高精度抛物线Radon变换法,因此基于同相轴追踪的三维多次波压制方法更适合于针对"海量"数据的三维多次波压制处理。

This paper introduces a method for 3D multiple suppression based on event tracing.First we use 3D high resolution stack velocity spectrum to improve the tracing accuracy.Quasi multiple records are built with traced multiple events.Then we achieve the multiple suppression in short windows by f-k filtering on these quasi multiple records.Synthetic and field data tests show that the proposed method achieves better multiple suppression than high-resolution parabolic Radon transform.Moreover,the proposed method has the computational efficiency significantly higher than the high-precision parabolic Radon transform.So this method is more suitable for 3D multiple suppression of massive seismic data.