摘要
在浅层地震勘探中,多次波常会造成构造假象,给地震资料解释工作带来极大的困难。基于信号理论的叠前和叠后预测反褶积、Radon变换、f-k滤波、聚束滤波等多次波衰减方法,以及基于波动方程理论的波场外推法、逆散射级数法、反馈迭代法等多次波预测相减法,是目前去除多次波的主要手段,各种方法都有一定的适用性。主要探讨了Radon变换方法在浅层地震资料多次波衰减中的应用效果,模型试算和实际资料应用证明,当1次波与多次波的剩余时差>30 ms时,Radon滤波方法效果最好。
In shallow seismic exploration,multiples always cause structural artifacts,which brings great difficulties to seismic data interpretation.The signal-theory-based multiple attenuation methods including pre-stack and post-stack prediction deconvolution,Radon transform,f-k domain filtering,bunching filter,and wave-equation-theory-based wave field extrapolation,inverse scattering series method,feedback iteration are the main methods of multiples elimination.But each method has certain limits in its applicability.This paper mainly explores the application of Radon transform in the multiple-wave attenuation of shallow seismic data.The model trial and actual data application prove that the Radon filtering method works best when the residual time difference between the primary and multiple waves is greater than 30 ms.
作者
罗传根
贺剑波
刘屹立
王振宇
Luo Chuangen;He Jianbo;Liu Yili;Wang Zhenyu(Geological Exploration Technology Institute of Jiangsu Province,Nanjing 210049,Jiangsu,China)
出处
《地质学刊》
CAS
2020年第1期132-140,共9页
Journal of Geology
基金
江苏省地质勘查基金项目“南通市城市地质调查”(苏财建[2017]140)。
