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原理众所周知,任意介质结构的地层模型(图1),其共中心点时距方程都可写成: t~2=t_0~2+X~2/V_S~2 (1)式中:t为反射时间; t_0为共中心点的垂直反射时间; x为炮检距。 V_s就其数量的大小而言,它是使某一既定地层模型的共中心点时距曲线满足于方程式(1)而存在的量;就其物理意义而言,它是反映地震波在既定地层模型中的传播规律的物理量;它既不同于地层的平均速度,也不同于用反射波时距曲线求得的有效速度。通常把它
Principle As we all know, any medium structure of the formation model (Figure 1), its center-point distance equation can be written as: t ~ 2 = t_0 ~ 2 + X ~ 2 / V_S ~ 2 (1) Where: t is the reflection time ; t_0 for the common center point of the vertical reflection time; x for the offset. V_s, in terms of its magnitude, is the quantity that exists when the centroid point-in-time curve of a given formation model is satisfied by equation (1); in terms of its physical meaning, it is a reflection of the magnitude of the seismic wave in a given formation model In the law of propagation of the physical quantity; it is different from the average velocity of the formation, but also with the reflected wave from the curve obtained from the effective speed. Usually put it