炮点位置偏离对叠加的影响及其校正方法

Influence of shot position′s deviation on stacking and correcting methods

在地震勘探过程中 ,由于地形、设备、人员疏忽等因素 ,不可避免地出现某些炮点的实际位置与最终输入到计算机建立空间属性的位置有所偏离。这不仅影响到静校正、动校正的精度 ,更重要的是影响了抽道叠加 ,使来自地下不同反射点的信号叠加在一起 ,导致错误的结论。本文对炮点位置偏离对叠加的影响作了具体的分析 ,并介绍了炮点位置检查和校正的方法 。

In the process of seismic exploration,because of the terrain,facility,personnel′s carelessness and other factors,som e recorded shot positions inevitably deviate from its real sites.Not only do harm for static correction and NMO,but also affect gathering and stacking seriously.It compounds signals from different reflection points and results in false conclusions.The influence of shot position's deviation on the seismic data stacking accuracy is analyzed here,and also introduces some methods on shot position check and correction.It is helpful for refined seismic data processing.