透射损失校正在AVO处理中的应用

The application of compensation of transmission loss in the processing of AVO

从多层弹性介质理论模型出发 ,探讨了用加层的方式正确计算透射损失的途径。在此基础上 ,我们对某井的实际弹性参数应用了此方法 ,计算了假设介质分别为弹性情况和粘弹性情况下的透射系数 ,得到了关于地震波在多层介质中传播时所发生的视衰减的基本认识 ;最后在AVO处理中用所得到的透射系数对反射波作了透射损失校正 ,与常规AVO处理相比取得了明显的效果。

According to the theoretical model of elastic media with multiple layers of different densities and velocities, this paper presents a so called add layer method to accurately calculate the transmission loss in strata. Transmission coefficients are calculated with the method for the real elastic parameters in a well under the hypotheses that the media are elastic or anelastic. From the results we can draw some conclusions about apparent attenuation of seismic waves that propagate in the multi layer media. The transmission coefficients are then used to compensate the transmission loss of reflections during AVO(amplitude versus offset) processing. The method yields desired results comparing with common AVO processing.