噪音减去法压制线性干扰

Linear interference suppressed by noise subtracting method

线性干扰是野外原始地震记录中一种常见的强能量干扰波。本文以实际地震资料处理工作为基础,采用F—K域滤波方法提取记录噪音初始模型,根据原始记录与噪音模型的差值结果对原始噪音模型进行加权处理,使合成噪音更加接近记录中的真实噪音,最终采用减去法,从记录中减去合成的噪音以达到滤波目的。叠前线性噪音的实际压制应用与分析表明,处理效果较为满意。

Linear interference is a common strong energy disturbing wave on the field original seismic record. In the paper, based on real seismic data processing, the noise initial model is abstracted and recorded by F-K filtering, which is weighting processed according to the difference of original record and noise model to make compound noise be true noise in the record. Subtraction method is applied to subtract compound noise form the record for filtering. Good processing results are achieved by the actual application and analysis ofprestack linear noise.