复合多域去噪技术在复杂地表区域地震数据处理中的应用
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摘要
复合多域去噪技术利用多域变换 ,将干扰波与有效波的差别最大化 ,从压制干扰波与提高有效波能量两个方面提高地震资料的信噪比。该技术根据干扰波与有效波的不同特征 ,分别在炮域、共炮检距域和超共中心点域 ,运用频率—空间域相关干扰压制、拉冬变换信噪分离、共炮检距域随机干扰消除、主频区域异常振幅压制、超共中心点域线性干扰消除 ,以及有效波识别加强等方法 ,在新疆、合肥、南方山地等复杂地表地区的资料处理中 ,提高了地震数据的信噪比。
The composite multidomain noise suppression technique can raise the signaltonoise of seismic data through maximizing the difference between the disturbing and effective waves, i.e. suppressing the energy of noise and enhancing the energy of the signal simultaneously using multidomain transformation. Based on the different characteristics of different waves, some methods have been applied on the domains of shot, common offset and super CMP respectively. It includes suppression of frequencyspace domain coherence noise, signalnoise separation by Radon transformation, random noise attenuation of the common offset domain, suppression of abnormal amplitude in the predominant frequency domain, linear noise reduction of the super CMP domain and effective wave identifying enhancement and so on. This technique has been used in the data processing of complex surface in Xinjiang, Hefei and Southern China with improving signal to noise performance
The composite multidomain noise suppression technique can raise the signaltonoise of seismic data through maximizing the difference between the disturbing and effective waves, i.e. suppressing the energy of noise and enhancing the energy of the signal simultaneously using multidomain transformation. Based on the different characteristics of different waves, some methods have been applied on the domains of shot, common offset and super CMP respectively. It includes suppression of frequencyspace domain coherence noise, signalnoise separation by Radon transformation, random noise attenuation of the common offset domain, suppression of abnormal amplitude in the predominant frequency domain, linear noise reduction of the super CMP domain and effective wave identifying enhancement and so on. This technique has been used in the data processing of complex surface in Xinjiang, Hefei and Southern China with improving signal to noise performance
引文
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2 屈智华.中国西部复杂地区地震资料处理.物探与化探,2000,24(1):11～13
3 段洪有.焉耆盆地低信噪比地震资料处理方法.物探与化探,1999,23(4):35～36
4 TadeuszJU ,MauricioDS ,MichaelGJ .Signalandnoiseseparation:artandscience.Geophysics,1999,64(5):1648～1656
5 王立歆,李强,姬小兵等.用Radon变换消除沙丘鸣震的应用与效果分析.石油物探,2002,41(1):88～91
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