海水声速剖面约束下的速度分析方法

Velocity analysis method under constraints of sound velocity profile

为得到水层反射所携带的水层速度信息,利用Munk公式描述水层速度的垂向变化,并在此基础上进行速度分析。通过引入水体地震记录同相轴补偿方法,在保留原始有效数据信息的同时,得到了与理论模型吻合的结果。将补偿及计算方法引入实际海洋反射地震的水体反射数据中,得到海水速度随反射时间的变化,为下一步的处理和成像提供了参考信息。

In order to obtain the water layer velocity information carried by the water layer reflection,Munk formula is used to describe the vertical change of the water layer velocity,and the velocity analysis is carried out on this basis.By introducing a compensation method for the events of the water body seismic record,while retaining the original effective data information,a result consistent with the theoretical model is obtained.The compensation and calculation methods are introduced into the water reflection data of actual ocean reflection seismic record.By this way,the change of sea water velocity with reflection time is obtained,which provides reference information for the next processing and imaging.