基于单炮初至及偏移距分布的振幅一致性处理

PROCESS OF THE AMPLITUDE ACCORDANCE BASED ON SINGLE-SHOT FIRST-BREAK AND OFFSET DISTANCE DISTRIBUTION

由于不同三维工区的采集时间、施工参数及激发、接收条件不同，区块问资料品质差异很大。常规的振幅补偿方法不能很好地解决能量不一致性问题，因此开发了基于单炮初至能量及偏移距分布的振幅一致性处理技术，采用统计单炮均方根振幅信息和基于偏移距分布求取补偿因子的方法消除非地层信息导致的振幅异常现象，很好地解决了海拉尔盆地乌尔逊断陷连片叠前时间偏移处理的振幅不一致性问题。

Due to the differences of the gathered time, operation parameters and the shooting ＆ receiving condi- tions of 3 D seismic site, the qualities among the blocks vary a great deal. The conventional amplitude compensating method cannot well resolved the discordant problem of the energies, therefore the amplitude accordance processing technique is developed based on the single-shot first-break energy and offset distance distribution. With the help of the information of statistical single-shot root-mean-square amplitude and offset distance distribution, the method of obtaining compensating factors are explored to eliminate the abnormal phenomena of the amplitudes resulted from non-stratigraphic information, thus the amplitude discordant problem can he much better resolved for the block-con- nected prestack time migration process in Wuerxun Fault Sag of Hailar Basin.