多次波识别与衰减

多次波衰减一直是地震数据处理中的难题，随着地震勘探向岩性勘探与油藏描述等的深入，多次波问题越来越引起人们重视。本届EAGE年会介绍了几种多次波识别与衰减新技术。模型逼近法可识别层间多次波；迭代法可以有效预测多次波；将多次波衰减技术与叠前深偏移技术结合能提高地震剖面的质量；反偏移技术将叠后预测多次波的稳定性与叠前预测多次波的准确性结合起来，提高了预测多次波的精度。

Recognition and suppression of multiple waves

Suppression of multiple waves is a difficult problem in seismic data processing.This problem is getting more prominent because of the wide acceptance of lithologic exploration and reservoir characterization techniques.Some new methods to suppress multiples were emerged at the 65th EAEG annual meeting.Model approximation method and iteration methods such as surface related multiple elimination and internal multiple elimination were used to predict multiple waves. The combination of multiple suppression and prestack depth migration provides a new way to suppress the multiples.With the stability of poststack prediction of multiples and the accuracy of prestack prediction of multiples,demigration method can effectively improve the prediction accuracy for multiples.