基于频率慢度域二阶算子的多次波去噪方法研究及应用  

Study and application of multi-wave laplacian noise suppression based on frequency-slow domain

作　　者：于海铖[1,2] 徐辉[2] 张学涛[2] 张军华[3] 郑旭刚[3] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国石化股份胜利油田分公司物探研究院,山东东营257022 [3]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《油气地质与采收率》2011年第4期44-46,114,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家"863"计划"面向油藏的高精度地面三维地震与陆上时移地震技术"(2007AA060502)

摘　　要：水层多次波和层间多次波干扰是在海上地震数据处理中的常见问题。当介质是横向变化较弱的地区和中等硬度的海底反射时,这些反射可以通过预测反褶积来压制;然而当海底非常坚硬且不规则时,海底构造与一维地球模型的不一致会使传统的去噪方法失效。频率慢度域二阶算子(Remul方法)是以地震正演数据模型为基础,推导了在线性拉东变换(T—p域)中的多次波压制因子。由于它是基于反射数据的模型,既考虑了水层多次波,又考虑了微屈多次波,所以压制因子和数据模型的一致性可以提高反褶积的效果。运用该方法在M工区进行了实验,结果表明,层间多次波得到了有效压制,有效波得到了较好恢复。Disturbance of water layer multiples and interbed multiples are the frequently encountered problems in seismic data processing. When the medium is the region of a weak lateral variation and moderate hard bottom reflect,these reflections can be suppressed by predictive deconvolution.However,when the seabed is very hard and irregular,seafloor structures inconsistent with one-dimensional model of the earth would also lead to failure of the traditional methods.The second order operator in frequency-slowness domain method is based on the seismic forward model,and it has deduced the multiple-wave suppression factor in linear radon transform(domain).Because it is based on reflection data model,and taking not only water layer multiples into account simultaneously,but also the peg-leg multiples,so,the consistency of suppression factors and data models can be a feasible way to improve the effectiveness of deconvolution.We implemented this method experiment in M area,the results show that the interbed multiples get effective suppression and effective waves are well restored.

关 键 词：Remul方法 多次波 正演模型 预测反褶积 压制因子 

分 类 号：P631.443.8[天文地球—地质矿产勘探]