【摘要】 基于波动方程压制表面多次波的反馈迭代方法,推导出压制表面多次波的逆数据域方法。该方法利用了一次波和表面多次波在逆数据域的可分离性质。含表面多次波的地震数据变换到逆数据域后,表面多次波的能量在逆数据域形成能量聚焦区域,可通过简单切除能量聚焦区域的信号实现表面多次波压制,避免了基于波动方程预测减去方法中的自适应相减过程,完全损伤不到一次波的能量。单道地震记录和合成炮数据模型试算表明:逆数据域多次被压制方法简单易行,可有效压制表面多次波,并保持一次波振幅不受损失。与常规的基于波动方程的表面多次被压制方法(SRME方法)对比表明,逆数据域方法能更好地应对有效波和多次波同相轴相交的情况。更多还原

【Abstract】 Based on wave equation,inverse data method is induced from feedback iteration method to attenuate surface-related multiples,which uses the separation properties between primaries and multiples in inverse data domain.After transforming seismic data with multiples to inverse data domain,multiples energy is focused in some area.Attenuating surface-related multiples in inverse data domain can be realized by muting the focus energy simply,which avoiding adaptive fitting subtraction during prediction and subtraction based on wave equation,and primaries energy can not be harmed.Single trace seismic record and synthetic shot data model tests show that inverse data method is simple and applicable,which can attenuate surface-related multiples effectively,also maintain primaries well.Comparing with conventional SRME method show that inverse data method can cope with intercept events between primaries and multiples well.更多还原