f-x域预测反褶积在多次波衰减中的应用

The application of f-x deconvolution in multiple attenuation

多次波是海洋资料处理中最主要的噪音,目前有多种多次波压制方法,但每一方法均有其优势和局限性,任意一种单一的方法均难有效地消除各种多次波,常采用SRME、拉冬、分频去绕射多次波组合的方法进行多次波的去除。在某些工区,即使采用上述组合方法仍然有能量强、频带宽的残余多次波,用常规的方法难以对其进行去除,对这类残余的多次波,这里提出运用f-x域预测反褶积的方法进行去除。该方法主要在共偏移距道集上进行处理,是基于f-x域信号的可预测性进行多次波的衰减,首先追踪出待消除多次波对应有效波的层位,再以此层位信号为依据,在f-x域内进行预测反褶积,压制多次波后,再将其共偏移距道集进行成像。通过理论数据模拟与实际资料验证得出:该方法对压制资料残余的强能量多次波,具有很好的压制效果。

Multiples is the most noise in the ocean data.To eliminate the multiples is one of hardcore during the processing. Although now there are many kinds of attenuation methods,every method has it's advantage and localization.All multiple can-not be attenuated by one.So the combinations combin srme,radon and dimat are usually used.But in some place,even by combination method also remain some residual multiple,so we advance f-x deconvolution method to suppress the residual mul-tiple.This method is processing in common offset section,which can be forecast in f-x field based on the signal.First tracing the multiple opposite signal layer,then according to this layer to do f-x transform,the do deconvolution process to suppress multiple.By theory model and actual data processing,we can draw the conclusion:the method of f-x deconvolution has good effect in attenuation strong energy residual multiple.