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在石油地震勘探野外资料采集时,当检波器放置于地表或接近于地表情况下,除了接收到反射波、折射波和随机干扰外,还会接收到一种沿自由表面或岩层分界面传播的波,这种类型的波只在自由表面或不同弹性介质分界面附近能观测到,其振幅随着离开自由表面的距离增大而呈指数形式衰减,其能量限制在一个表面薄层内,因此称为面波,通常也称为地滚波。鉴于面波在地震勘探中的普遍性和重要性,本文对于面波的最重要的特征频散特征进行分析研究,有利于在地震勘探中对于面波进行科学的处理。
In the field of petroleum seismic exploration field data acquisition, when the detector placed on the ground or close to the surface of the case, in addition to receiving the reflected waves, refracted waves and random interference, but also receive a free surface or rock layer interface Waves of this type can only be observed in the vicinity of the free surface or in the vicinity of the interface of different elastic media and their amplitude decreases exponentially with increasing distance from the free surface and their energy is confined within a thin layer of the surface Known as the surface wave, also known as ground roll. In view of the universality and importance of surface waves in seismic exploration, this paper analyzes and studies the most important feature dispersion of surface waves, which is helpful for the scientific treatment of surface waves in seismic exploration.