摘要
基于波动方程预测相减的表面多次波压制方法,能较好压制地下复杂介质产生的多次波,但是计算成本较高。基于滤波方法压制多次波计算效率较高,对一次波和多次波存在较大时差的地震数据有明显的压制效果,但是对来自复杂介质的地震数据较难得到良好的压制效果。将波动方程法和滤波法结合,提出一种基于抛物Radon变换和波动方程的多次波压制方法。首先应用表面多次波形成机理预测多次波,利用对应的预测多次波的地震记录和初始地震记录,在抛物Radon域设计自适应滤波函数,通过准确滤波得到多次波在抛物Radon域的能量;然后通过反变换得到多次波,从原始地震记录中减去多次波,得到压制多次波后的结果。水平层状模型及SMAART模型测试结果表明,该方法结合两种方法的优点,能够准确、高效压制来自地下复杂介质产生的表面多次波。
The surface multiple wave suppression method based on the prediction of the wave equation can suppress the multiple waves generated by the underground complex medium,but the calculation cost is high.The multi-wave calculation based on the filtering method has higher efficiency,and has obvious suppression effect on the seismic data with large time difference of the first wave and the multiple wave,but it is difficult to obtain good suppression effect on the seismic data from the complex medium.In this paper,the wave equation method and the filtering method are effectively combined,and a multi-wave suppression method based on the combination of parabolic Radon transform and wave equation is proposed.The method uses the surface multiple wave formation mechanism to predict multiple waves,and uses the predicted multiple wave seismic record and the initial seismic record to design an adaptive filter function corresponding to the parabolic Radon domain result,which can accurately filter the multiple-wave in the parabolic Radon domain.The energy is obtained by inverse transformation to obtain multiple waves,and the result of subtracting multiple waves from the original seismic record to obtain multiple waves is obtained.Using this method to test the horizontal layered model and the complex SMAART model,the results show that the proposed method combines the advantages of the two methods and can accurately and efficiently suppress surface multiple waves generated from underground complex media.
作者
毕博文
王维红
包培楠
林弘喆
BI Bowen;WANG Weihong;BAO Peinan;LIN Hongzhe(School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China)
出处
《东北石油大学学报》
CAS
北大核心
2019年第2期35-40,I0003,共7页
Journal of Northeast Petroleum University
基金
国家自然科学基金项目(41574117)
国家自然科学基金项目(41474118)
黑龙江省杰出青年科学基金项目(JC2016006)
