GRISYS处理系统中线性干扰去除方法研究
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摘要
线性干扰是野外原始地震记录中一种常见的强能量干扰波。本文以实际地震资料处理工作为基础,对GRISYS处理系统中常用的去线性干扰的RELNOI模块和LINOEL模块的使用方法、参数和效果进行了分析研究和对比,发现RELNOI模块对直达波形成的强线性干扰去噪效果较好,但对远道存在的局部性线性干扰去噪效果不如LINOEL模块,而用两个模块迭代线性去噪,可取得较好的应用效果。在此基础上提出了一些叠前、叠后去除线性干扰及叠前去除地表散射的应用方法以及在实际使用中的注意事项,并取得了较好的应用效果。这些改进在GRISYS处理系统优化这两个模块时可作为参考。
Linear interference is a common interference wave with stronger energy on raw field seismic records.On the basis of practical seismic data processing work,the paper analyzed and correlated the usage method,parameters and effects of linear interference-removing modules RELNOI and LINOEL,discovering that the RELNOI module has good denoise effect for the strong linear interference formed by direct arrivals,but there is still remaining local linear interference at the far-offsets' traces,the denoise effect is not better than that of LINOEL module.Iterative usage of two modules for removing linear noises can achieve better effect of application.On that basis,the paper proposed some application methods for removing prestack and poststack linear interference and prestack lateral reflections,and matters needing attention in practical usage,which achieved good results.These improvements can be taken as references when optimizing these two modules in GRISYS processing system.
Linear interference is a common interference wave with stronger energy on raw field seismic records.On the basis of practical seismic data processing work,the paper analyzed and correlated the usage method,parameters and effects of linear interference-removing modules RELNOI and LINOEL,discovering that the RELNOI module has good denoise effect for the strong linear interference formed by direct arrivals,but there is still remaining local linear interference at the far-offsets' traces,the denoise effect is not better than that of LINOEL module.Iterative usage of two modules for removing linear noises can achieve better effect of application.On that basis,the paper proposed some application methods for removing prestack and poststack linear interference and prestack lateral reflections,and matters needing attention in practical usage,which achieved good results.These improvements can be taken as references when optimizing these two modules in GRISYS processing system.
引文
[1]GRISYS处理系统参考手册
[2]林盛,吴峰,李衍达.叠前相干干扰滤除——倾斜滤波法.石油地球物理勘探,1998,33(3):390～398
[2]林盛,吴峰,李衍达.叠前相干干扰滤除——倾斜滤波法.石油地球物理勘探,1998,33(3):390～398
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