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本文描述一种在没有事先确定速度函数的情况下,在共中心点地震数据常速迭加中加入倾角时差校正的方法。运动学的倾角时差校正在速度空间中的形式特别简单。因此速度分析能在倾角校正后的最终的三维数据体上完成。对应于确定速度函数的迭加剖面,能在倾角校正常速迭加之间插值提取。该法适用于窗范围内横向速度的变化很小的情况,如果在充分宽的数据窗范围内横向速度变化很小,则偏移步骤即可在很少的附加费用下加入,并且可在确定速度函数之前加入。
This paper describes a method of adding dip time difference correction to the seismic data superposition at a common center without prior determination of the velocity function. Kinematic dip angle difference correction in the speed space in the form of a particularly simple. Therefore, velocity analysis can be done on the final 3D data body after the dip correction. The superposition profile corresponding to the determined velocity function can be interpolated and interpolated between the superpositions of normal and normal velocities. This method is suitable for small changes in lateral velocity in the window range. If the lateral velocity varies little over a wide data window, the offset step can be added with little additional expense and, after determining Join before speed function.