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面波是陆上地震勘探中的一种强干扰波，为了提高地震资料的信噪比和分辨率，必须在叠前对其予以压制。以往人们对面波压制方法的研究，基本上是依据面波的频率特性或视速度特性，并在实际应用中见到了一定的效果。但由于只侧重考虑面波的单一特性或在理论上基于某种数学假设，致使这些方法都会对有效波造成不同程度的损失。本文在用一定的数学方法对面波波场进行精确描述的基础上，提出了一种新的波场变换与分离方法，并成功地实现了面波波场与有效波波场的分离。该方法在压制面波的同时，可使有效波的能量（尤其是其低频能量）不受损失，有效地保持信号的频宽不变，提高记录的信噪比。实际资料的处理结果表明，本文方法是一种比较理想的叠前面波压制方法。
Surface waves are a kind of strong interference wave in onshore seismic exploration. In order to improve the signal-to-noise ratio and resolution of seismic data, they must be suppressed before stacking. In the past, people studied the method of surface wave suppression basically based on the frequency characteristics or apparent velocity characteristics of surface waves and saw some effects in practical application. However, due to the sole consideration of single characteristics of surface waves or theoretically based on certain mathematical assumptions, these methods will result in varying degrees of loss of effective waves. This paper presents a new method of wavefield transformation and separation based on the accurate mathematical description of the surface wavefield, and successfully separates the surface wavefield from the effective wavefield. The method can suppress the energy of the effective wave (especially its low frequency energy) while suppressing the surface wave, effectively keep the bandwidth of the signal unchanged, and improve the recorded signal-to-noise ratio. The actual data processing results show that this method is an ideal prestack wave suppression method.