CAJ | 학술논문

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。
다차파압제시지진감탐중적중요과제。기우필배려파기설계적다차파자괄응감방법，대 L1범수다차파자괄응감방법진행개진，증가료일개문한치삼수。동시침대상규자괄응감방법중채용적인과려파기지능연시간축정향진행다차파필배적불족，채용료비인과려파기진행다차파자괄응감，증가료산자령시간적위치삼수。통과인입신삼수증강방법적괄응성，개진방법제고료계산속도。통과대소설계적1D 수거모형화합성지진기록적처리표명，재예측적다차파여원시기록중적다차파존재진폭화도체시간차별적정황하，비인과려파기능급출교이상적결과；동시개진적자괄응감방법가이감소계산시간。
Multiple attenuation is an important issue in seismic exploration field.Adaptive multiple subtraction method cho-sen 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 multi-ple subtractions,a parameter 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 1D data 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.