频率—慢度域层间多次波衰减技术及其应用

The Multiple Attenuation Based in Frequency-slowness Domain

多次波是地震勘探中常见的一种干扰波,传统的多次波压制方法主要针对长周期多次波,不适应于正常时差较小的近偏移距短周期多次波。基于Lokshtanov等人提出的多次波衰减原理,本文导出了频率—慢度域多次波压制因子,利用海底面的一次鸣震来估算海底反射系数,在频率-慢度域实现地震数据中的多次波压制。通过实际地震数据处理,结果表明文中所提出的方法可以较为有效地压制近偏移距短周期多次波,从而为地震资料后续处理提供了基本保证。

Multiple is one of interference waves in seismic exploration. The conventional methods can suppress effectively the long period multiples. However, they are not suitable for multiples which focus on near offset. The multiple attenuation factor can be derived in frequency--slowness domain based on principle proposed by Lokshtanov in this paper. The multiples can be attenuated according to reflection coefficient computed based on singing in frequency--slowness domain. The processing results on real seismic data proves this meth- od can suppress effectively the multiples which focus on near offset, and it benefits subse- quent processing for seismic data.