径向道技术在消除相干噪声中的应用

自Henley于1999年成功地将径向道变换应用于相干噪声消除以来，该项技术得到了广泛和深入的发展。发展方向主要为：①选择最佳径向道原点，使之更适于拟合地震资料中的相干噪声；②更新原有的插值技术，使径向道变换过程中对相干噪声的拟合更为准确及在去噪过程中对有效波的影响减到最小；③如何更好地将有效的相干噪声消除技术与径向道变换技术相结合；④避开径向道变换中的插值过程，采用局部径向道预测技术来消除相干噪声；⑤变径向道原点及分频处理等等。分析了上述技术的发展背景、各自优缺点及适应性。提出了新的径向道扫描方法，理论模型和实际资料试验表明这种方法更利于相干噪声的消除。

Application of radial trace technique in elimination of coherent noise

Since it was successfully applied to eliminate coherent noise by Henley in 1999,radial trace transform technique has been developed quickly in following directions:(1)Determining the best radial trace origin to fit coherent noise in seismic record;(2)Renovating interpolation technique to fit coherent noise more accurately in radial trace transformation and minimize the influence on effective wave while denoising;(3)How to combine coherent noise elimination method with radial trace transform;(4)Adopting local radial trace prediction to avoid interpolation in radial trace transform;and(5)Variable radial trace origin and frequency division processing.We analyzed the background,advantages and disadvantages,as well as the adaptability of all these methods,and put forward a new scan method for radial trace determination.Results from theoretical model and real data demonstrated the correctness of the proposed method.