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面波是地震勘探中广泛存在的一种规则干扰波，在资料处理中要去除面波又十分棘手。常规的滤波方法在滤除面波的同时也对与面波处于同一频带的有效信号造成了损害。本文基于在较低频率处面波的能量强于反射波、在小频率范围和小空间范围内面波能量变化缓慢的假设条件下，提出在小波变换频带分解的基础上，先用面波的视速度对面波作线性时移，使面波逐道相干，再利用KL分解或沿x方向进行小波变换的方法来提取面波，并将其从原始资料中减去。经过合成数据和实际资料的处理证明，这种方法可以十分有效地消除面波，同时不损失反射波的低频成分。
Surface wave is a kind of regular interference wave widely existing in seismic exploration. It is very tricky to remove surface wave in data processing. Conventional filtering methods filter out surface waves as well as damaging useful signals in the same frequency band as surface waves. Based on the assumption that the energy of surface waves at lower frequencies is stronger than that of reflected waves and the energy of surface waves changes slowly in the small and small space, The velocity of the opposite wave is linearly time-shifted, so that the surface wave is coherently track-by-tract. The surface wave is extracted by KL decomposition or wavelet transform along the x direction and subtracted from the original data. After the synthetic data and actual data processing proves that this method can be very effective in the elimination of surface waves, without loss of reflected low frequency components.