基于剩余Q值的振幅校正

Amplitude correction based on the residual Q value

针对实际地震资料处理时,经常存在像"气云"等引起的局部弱振幅区,给地质解释带来很大困难的问题,本文提出一种基于剩余Q值的局部振幅恢复方法。通过小时窗弱反射区与剖面背景不同频率的振幅值变化,估算出弱反射区相对于大时窗背景的较为稳定的剩余Q值,对其频率衰减和振幅损失进行恢复。该方法只针对局部相对弱振幅区补偿处理而非整体反Q处理,其他区域波组特征则基本保持不变。在实际资料的应用中取得了非常明显的效果。

In the seismic data processing,local weak amplitude is often occurred by special geological conditions such asgas clouds",which affects data interpretation.To solve this problem,we propose in this paper a method for amplitude correction based on the residual Qvalue.Based on amplitude at different frequency in a small window,the residual Q value at a weak amplitude area in a large window is estimated.Then frequency attenuation and amplitude loss are recovered.This method only aims at local weak amplitude correction and wave characteristics at the other area remain the same.Real data applications prove the effectiveness of the proposed method.