【摘要】 多次波压制是地震勘探中的重要课题。基于匹配滤波器设计的多次波自适应减方法,对L1范数多次波自适应减方法进行改进,增加了一个门限值参数。同时针对常规自适应减方法中采用的因果滤波器只能沿时间轴正向进行多次波匹配的不足,采用了非因果滤波器进行多次波自适应减,增加了算子零时间的位置参数。通过引入新参数增强方法的适应性,改进方法提高了计算速度。通过对所设计的1D数据模型和合成地震记录的处理表明,在预测的多次波与原始记录中的多次波存在振幅和到达时间差别的情况下,非因果滤波器能给出较理想的结果;同时改进的自适应减方法可以减少计算时间。更多还原

【Abstract】 Multiple attenuation is an important issue in seismic exploration field.Adaptive multiple subtraction method chosen in this paper are based on matching filter,and then improved the L1-norm adaptive emultiple subtraction method by adding a threshold parameter.While conventional causal matching filter for adaptive multiple subtraction can only be used in matching the multiple waves forward along the timeline.For this problem,we designed a non-causal matching filter to multiple subtractions,aparameter which shows the zero-time position was added.By introducing new parameters,the scope of the method was expanded;and the speed was faster after improving the method.After processing the 1Ddata model and synthetic seismogram record,we knew that while there are amplitude and arrival time differences between prediction multiple traces and the original multiple waves,non-causal matching filter could give a good result,and by improving the adaptive subtraction method could reduce the computation time.更多还原