南黄海盆地滩浅海区多次波组合压制技术的应用

Application of the combination suppressing techniques for multiple in the beach neritic area of the south of the Yellow Sea Basin

针对南黄海盆地滩浅海区地震资料中的鸣震干扰、全程多次波和层间多次波的特点,根据各类压制多次波方法的实用条件及其优缺点,提出了多次波压制策略:通过双检合并处理技术压制滩浅海区的鬼波和微屈多次波,通过预测反褶积压制残余鸣震及层间多次波;通过高分辨率Radon变换压制全程多次波和层间多次波;在叠前CRP道集上应用高分辨率Radon变换、内切和中值滤波压制小时差层间多次波。应用效果验证了该组合压制技术的有效性。

A strategy is proposed to suppress multiples based on the application conditions and pros and cons of the techniques to suppress multiple in view of the features of reverberations, long- path multiples and interbed multiples in the seismic data at beach neritic area of south of Yellow Sea Basin. The ghost-wave and peg-leg multiples are suppressed by combination of the dual detectors, the remaining reverberations and interbed multiples are suppressed by the predictive deconvolution, the long-path multiples and interbed multiples are suppressed by the highresolution Radon transform, the little moveout interbed multiples are suppressed by the high- resolution Radon transform, internal cut, medium filtering at the pre-stack CRP gathers. The result verified the validity of the combination suppressing techniques.