地震折射波的虚拟速度——临界角谱的原理与制作方法

THE PRINCIPLE AND PROCESSING METHOD OF GHOST VELOCITY-CRITICAL ANGLE SPECTRUM OF SEISMIC REFRACTION

虚拟速度—临界角谱是地震折射波虚拟射线理论的应用之一。根据共始点或共折射点记录的相似性,利用第一虚拟时距曲线方程,对时距曲线进行扫描计算,可以制作共始点谱和共折射点谱。 文中,通过实际介质模型的计算机试算结果,对该方法作了验证。

The Ghost Velocity-Critical Angle Spectrum is one of the applications of the ghost ray theory of seismic refraction. Based on the similarity of the Common Beginning Point (CBP) or the Common Refraction Point (CRP), the CBP spectrum or the CRP spectrum can be achieved through scanning the time -distance curve of the First Ghost T-D Equation.The method is verified in the paper by the result of computations of real medium models.