在τ-p域多道分频自适应匹配减法压制多次波  

The Adaptive Matching Subtraction of Multichannel Frequency Division Suppressing Multiple Waves in τ-p Domain

作　　者：王新领 赵明 但志伟 李三福 刘杰明 

机构地区：[1]中海油能源发展工程技术特普公司,广东湛江524000

出　　处：《工程地球物理学报》2017年第1期84-89,共6页Chinese Journal of Engineering Geophysics

摘　　要：在τ-p域分频对多次波模型和地震数据进行能量和相位匹配,是多次波匹配衰减的一种有效的方法。海上多次波非常发育,常规的3DSMRE技术与2DSRME相比,预测出的多次波模型精度将得到较大的提高,但是在t-x域进行匹配衰减后,仍然有一部分模型预测出来的多次波未被衰减,这些残留的多次波给后续剩余多次波衰减带来了难度。在SRME准确地预测出多次波模型的基础上,采用小波变换分频技术,在τ-p域实现多道分频自适应匹配减法压制多次波。实际地震资料的多次波压制效果表明,该方法不仅有效地分离了衰减多次波,而且最大限度地保护了有效波的低频能量。It is an effective method of multiple matched attenuation to match energy and phase for the model of multiple waves and seismic data in τ -f domain. Marine multiples develop very fas tand the normal 3DSRME technology will improve the accuracy of predic-ted multiple model,compared with 2DSRME technology. However, it still has a model that multiples predicted have no attenuation after matching subtraction in t - x domain,and these remnant multiples would cause some difficulty in subsequent remnant multiple attenu-ation. This paper,based on the accurate multiple models predicted by SRME,adopts the frequency division technology of wavelet transform to suppress multiple waves by using the adaptive matching subtraction of multichannel frequency division in τ -p domain. The re-sult of mult iple wave suppression from actual seismic data shows that this method not only separates effectively attenuation multiple waves, but protects the low frequency energy of effective waves in maximum degree.

关 键 词：Τ-P变换 小波变换 自适应匹配减法 分频技术 

分 类 号：P631.4[天文地球—地质矿产勘探]