复杂地表情况的动校正方案

本文分析了山地地震资料处理中地表高程变化和近地表速度变化的动校正叠加及其与静校正的关系,提出了基于平滑地表面的处理方式。通过把动校正公式分解为两个半支双曲线,在保证使用同一个T0速度的条件下,分别进行与炮点高程和接收点高程有关的正常时差校正,然后在叠加之前进行基本时差校正。本文方法在典型山地地震资料处理中取得了有益经验和良好效果。

A NMO scheme for complicated surface

The paper analyzed NMO stack in a situation of variation in surface altitude and in near-surface velocity in seismic data processing at mountain area and its relation with statics,proposed a processing scheme based on smoothing surface. Through decomposition of NMO formula into two half-hyperbola and in a condition of using same T0 velocity, the NMO correction related to shot-altitude and receiver-altitude is done separately and then basic moveout correction is done before stack. The results showed that the method achieved useful experience and good effects in seismic data processing at typical mountain area.