径向道变换压制高密度采集资料中的相干噪声
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摘要
在对径向道(RT)变换滤波压制相干噪声基本原理研究的基础上,通过在模拟及实际资料中与产f-k滤波效果的对比分析,表明RT滤波可以根据噪声特点,通过选择合适的变换原点与视速度范围进行局部处理,而不影响其余区域。针对高密度采集资料对地震波场实现无假频采样,对比分析了RT滤波在高密度采集与普通道距采集资料中的应用效果,并对实际高密度资料进行了处理试验,充分验证了RT滤波在高密度资料处理中压制相干噪声的有效性。RT滤波非常适用干高密度资料的相干噪声衰减,但其作为一种成熟的高密度资料去噪技术还需进行完善。
Based on studying the fundamental principle of filtering by radial trace(RT)transform to depress coherent noise,we showed,through correlation and analysis on f-k filtering effect in simulated and practical data,that the RT filtering can be treated locally by selecting adequate transform origin and range of apparent velocity based on the feature of noises,without affecting other regions. Faced with alias-free sampling of seismic wavefield in high-density acquired data,we correlated and analyzed application effects of RT filtering in acquired data by high density and common group interval,and carried out processing test for highdensity acquired data,which fully demonstrated the effectiveness of RT filtering depressing coherent noise in high-density acquired data.RT filtering is very suitable for usage in attenuation of coherent noise in high-density acquired data,but it still needs to be completed as a mature denoise technique of high-density acquired data.
Based on studying the fundamental principle of filtering by radial trace(RT)transform to depress coherent noise,we showed,through correlation and analysis on f-k filtering effect in simulated and practical data,that the RT filtering can be treated locally by selecting adequate transform origin and range of apparent velocity based on the feature of noises,without affecting other regions. Faced with alias-free sampling of seismic wavefield in high-density acquired data,we correlated and analyzed application effects of RT filtering in acquired data by high density and common group interval,and carried out processing test for highdensity acquired data,which fully demonstrated the effectiveness of RT filtering depressing coherent noise in high-density acquired data.RT filtering is very suitable for usage in attenuation of coherent noise in high-density acquired data,but it still needs to be completed as a mature denoise technique of high-density acquired data.
引文
[1]Cai Xiling,Liu Xuewei,Deng Chunyan,LüYing- mei.Characteristics analysis on high density spatial sampling seismic data.Applied Geophysics,3(1): 48～54
[2]曹务祥．高空间密度采样资料分析．勘探地球物理进展，2006，29(3)：178～182
[3]曹务祥．单道接收地震资料的室内组合方法．石油地球物理勘探，2006，41(6)：615～618
[4]Ottolini R.Downward continuation of common mid- point gathers by transformation into snell trace coor- dinates.Stanford Exploration Project Report, 1979:83～94
[5]Taner M T.Long-period sea-floor multiples and their suppression.Geophysical Prospecting,1980,28(1): 30～48
[6]Lamont M G,Hartley B M,Uren N F.multiple atten- uation using the MMO and ISR preconditioning trans- forms.The Leading Edge,1999,18(1),110～114
[7]Henley D C.The radial trace transform:An effective domain for coherent noise attenuation and wavefiled separation.Expanded Abstracts of 69th Annual In- ternat SEG Mtg,1999,1204～1207
[8]Henley D C.Coherent noise attenuation in the radial trace domain.Geophysics,2003,68(4):1408～1416
[9]Henley D C.Coherent noise attenuation in the radial trace domain.,introduction and demonstra- tion.CREWES Research Report,1999,1(11): 455～491
[10]Henley D C.Coherent noise attenuation in the radial trace domain:current practice and enhancements. CREWESResearch Report,2002,1(14):1～13
[11]余波，黄中玉，谈大龙，徐亦鸣．径向道滤波法去线性干扰．石油物探，2005，44(2)：109～112
[12]苑益军，牛滨华，王焕弟，刘爱香．去噪技术在地震资料处理中的应用．东华理工学院学报，2005，28(1)：2～16
[13]王卫华．利用中值相关滤波预测相干信号．石油地球物理勘探，2000，35(3)：273～282
[2]曹务祥．高空间密度采样资料分析．勘探地球物理进展，2006，29(3)：178～182
[3]曹务祥．单道接收地震资料的室内组合方法．石油地球物理勘探，2006，41(6)：615～618
[4]Ottolini R.Downward continuation of common mid- point gathers by transformation into snell trace coor- dinates.Stanford Exploration Project Report, 1979:83～94
[5]Taner M T.Long-period sea-floor multiples and their suppression.Geophysical Prospecting,1980,28(1): 30～48
[6]Lamont M G,Hartley B M,Uren N F.multiple atten- uation using the MMO and ISR preconditioning trans- forms.The Leading Edge,1999,18(1),110～114
[7]Henley D C.The radial trace transform:An effective domain for coherent noise attenuation and wavefiled separation.Expanded Abstracts of 69th Annual In- ternat SEG Mtg,1999,1204～1207
[8]Henley D C.Coherent noise attenuation in the radial trace domain.Geophysics,2003,68(4):1408～1416
[9]Henley D C.Coherent noise attenuation in the radial trace domain.,introduction and demonstra- tion.CREWES Research Report,1999,1(11): 455～491
[10]Henley D C.Coherent noise attenuation in the radial trace domain:current practice and enhancements. CREWESResearch Report,2002,1(14):1～13
[11]余波，黄中玉，谈大龙，徐亦鸣．径向道滤波法去线性干扰．石油物探，2005，44(2)：109～112
[12]苑益军，牛滨华，王焕弟，刘爱香．去噪技术在地震资料处理中的应用．东华理工学院学报，2005，28(1)：2～16
[13]王卫华．利用中值相关滤波预测相干信号．石油地球物理勘探，2000，35(3)：273～282
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