差异散射多次波自适应消减法研究

在海上地震资料处理过程中，反射多次波和散射多次波同时存在于地震资料中。由于散射多次波相对于反射多次波的能量弱，且具有时空非稳态特征，难以在常规SRME 方法中去除，影响进一步的数据分析工作。将含有这两种多次波的地震数据进行分离并分别做SRME 多次波预测，通过自适应衰减方法有效地匹配不同类型多次波，尤其是非稳态的散射多次波。通过sigsbee2B 模型的试算，经对比理想无多次波影响的地震数据资料，表明该方法可以有效地同时消除反射多次波和差异散射多次波。

Research on adaptive subtraction of different diffractive multiple wave

In marine seismic data processing, both reflective and diffractive multiple waves exsist in seismic data. Because the energy of diffractive multiple wave is weaker than reflective multiple wave and shows nonstationary characteristics, it is difficult to remove in conventional SRME method, which affects the following data analysis. The authors separate the seismic data with the two kinds of multiple waves, predict multiple waves using SRME, and finally match different multiple waves, especially nonstationary diffractive multiple waves through adaptive subtraction method. Testing of Sigsbee 2B model shows that reflective and different diffractive multiple waves can be eliminated effectively at the same time compared with the ideal infinite-model data without multiple waves.