摘要
逆散射级数法在有效预测层间多次波的同时,面临着一次波和多次波叠加的干扰,为解决压制多次波时保护有效信号不被损伤的问题,开展了逆散射级数层间多次波压制方法的研究。首先从理论上推导并阐述了逆散射级数层间多次波压制方法的物理机制,然后改进常规层间多次波压制处理流程,在逆散射级数法预测层间多次波前、后去除和补偿子波来提高层间多次波预测的准确性,从而降低对自适应相减的依赖度。该方法完全由数据驱动,无需人工干预和先验信息,适用于复杂地形和地质情况的层间多次波压制。模型数据和实际数据应用结果证明了方法的有效性和适用性。
In seismic exploration,due to the interference and overlay of primaries and internal multiples,it is difficult to remove internal multiples,and sometimes,subtracting internal multiples will damage the effective signals.Hence,based on the scattering theory,the inverse scattering series internal multiple attenuation method is discussed,with a detailed demonstration of its physical and mathematical foundations.Moreover,the processing flow is modified by accommodating the source wavelet effect to improve the accuracy of the prediction of the internal multiple and reduce dependence on the adaptive subtraction.This method is completely data-driven and does not require any subsurface information.It is applicable to complex topography and geology.The numerical and field data tests show the validity and applicability of the inverse scattering series internal multiple attenuation method.
作者
杨金龙
朱立华
YANG Jinlong;ZHU Lihua(Sinopec Geophysical Research Institute,Nanjing 211103,China)
出处
《石油物探》
EI
CSCD
北大核心
2018年第6期853-861,共9页
Geophysical Prospecting For Petroleum
基金
国家科技重大专项(2016ZX05014-001-002)资助~~
关键词
层间多次波
散射理论
波动方程
逆散射级数
子波
数据驱动
自适应相减
internal multiple
scattering theory
wave equation
inverse scattering series
wavelet
data-driven
adaptive subtraction
