在地震数据处理中，恢复缺失的近偏移距道数据是一项非常重要的工作。
Restoration of near-offset missing datum is an interesting and important problem in seismic data processing.
利用井间地震特有的共偏移距道集，找出了适宜于分析井间地震偏移速度的方法。
Using special common offset gather for crosshole seismic, a migration velocity analysis method is developed for crosshole seismic.
低频的地震道和长偏移距道都是切除的目标。
Low-frequency traces and long-offset traces are typical targets for muting.
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