3D VSP波动方程深度偏移成像方法研究

The research on 3D VSP wave equation depth migration imaging

介绍了一种基于波场外推的波动方程深度偏移成像方法。该方法不仅考虑了波场在地下传播过程中的绕射和折射效应,而且没有Kirchhoff方法中的高频近似假设和在复杂构造区的焦散及多路径现象。该方法在胜利垦71井区3DVSP实际资料处理中取得了比较好的成像效果。

A kind of method about wave equation depth migration imaging based on wave field extrapolation is introduced here, which not only takes into account of the diffracted wave field and refracted wave field in propagation but also goes without high frequency approximate assumption in Kirchhoffand focal length scatter and multi paths in complex structural area. Good result of imaging with this method in the processing of 3D VSP seismic data of Ken 71 Well Area in Shengli Oilfield is achieved.