径向道变换压制高密度采集资料中的相干噪声

Study on using radial trace transform to depress coherent noise in high-density acquired data

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.