海底电缆资料多次波衰减方法探究

The Investigation OBC Multiple Seismic Data Attenuation Methods

海上地震勘探中资料多次波的消除主要采用预测反褶积，也有采用诸如模式匹配和多域滤波等替代技术，这些技术的优势在于它们对预测出的多次波振幅的依赖较小。许多研究表明，没有一种方法是在所有情况下都能有效压制多次波的。模式匹配和多域滤波的消除技术在压制多次波的同时也衰减了有效信号。针对海底电缆资料的特点，目前多采用波场分离、双检求和技术来消除其中的多次波，而且获得了较好的效果。此项技术的关键是在如何求和上。叙述了海上多次波干扰与海底电缆地震资料的特点以及其处理特点，针对上述的特点介绍了相关的海底电缆资料多次波衰减方法，重点描述了一种新的消除多次波的求和方法及其应用实例。

Forecast deconvolution is used to eliminate the multiple of offshore seismic data, but some alternative technologies such as pattern matching and multi-domain filtering technologies are alsoused. It is necessary to point out that the dependence of the alternative technologies on the multiple amplitude is smaller. Many studies show that there is no method which is equally effective in suppressing the multiple in all circumstances. Pattern matching and multi-domain filtering technolegies can repress multiple but at the same time attenuate a number of effective signal. For the information on the characteristics of the OBC, wave field separation and double seizure summation of technology to eliminate the multiple are often used, and getgood results. The characteristics of the offshore multiple interference and the OBC seismic data as well as the characteristics of its processing characteristics are decribed in this paper.The relevant information on OBC multiple attenuation methods, in particular, a new summation method to eliminate multiple and its application are explained.