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根据水平迭加速度谱用DIX公式求取层速度的方法,只适用水平层状介质。对任意倾斜层状介质必须寻求新的方法。本文介绍了多层介质速度分析方法,它根据二维平面倾斜层CDP时距曲线方程导出的逐层递推公式,在深度域内进行二维倾角、速度扫描。然后采用广义似然法进行符号位检测,自动求取各层速度、倾角和厚度。
According to the horizontal superposition speed spectrum DIX formula to get the layer velocity method, only for horizontal layered media. For any inclined layered media must seek new ways. In this paper, the method of multi-layered media velocity analysis is introduced. According to the layer-by-layer recursion formula derived from the CDP time-history curve equation of two-dimensional plane slant layer, two-dimensional dip and velocity scanning are carried out in the depth domain. Then use the generalized likelihood method for sign bit detection, automatically calculate the velocity, dip and thickness of each layer.