在PSV波勘探中,由于入射P波,反射SV波引起的传播路径不对称,使反射点偏离共中心点,浅层比深层偏得远;大炮检距比小炮检距偏得严重。如果不做这种偏离的校正,就不可能实现共反射点叠加。本文从理论上证明了PSV波射线轨迹的单调性;叙述了采用“网格移动法”在水平方向上做PSV波的运动学特征的偏移步骤,并且给出了一些实际算例。 In PSV exploration, due to the incident P-wave, the reflected SV wave causes the propagation path to be asymmetric, so that the reflection point deviates from the center point and the shallow layer is far away from the deep layer. If you do not do this kind of deviation correction, it is impossible to achieve the total reflection point superposition. This paper theoretically proves the monotonicity of the trajectory of the PSV wave. Describes the offset step of the kinematic feature of the PSV wave in the horizontal direction by the “grid shift method”, and gives some practical examples.