摘要
基于波场传播原理,分别推导了海上拖缆双检地震采集中压力波场和速度波场鬼波算子,建立了检波器接收信号和上行波场线性关系,利用最小二乘反演和匹配滤波算法求解拖缆处上行波场,该方法无需地下介质信息,实现数据驱动鬼波压制,通过引入噪声影响因子,减少因水、陆检信号的信噪比差异对鬼波压制效果的影响。数值模拟资料和拖缆双检实际资料处理结果表明,基于最小二乘反演的拖缆双检鬼波压制方法可以有效压制鬼波能量,拓宽资料频带,有利于后续资料的处理和解释。
The ghost operators for both pressure and velocity wave-fields,for dual-sensor marine seismic streamer acquisition data,are derived based on the wave-field propagation theory,and the linear relationship between the receiver signals and the up-going wave-fields is calculated.Using least squares inversion and matched filtering techniques,the ghost-free wavefield for given depths of the streamer are calculated.The proposed method can achieve a data-driven ghost removal system,without the need for subsurface information.By introducing the noise level factor,the difference between the signal-to-noise ratios(SNR)of a geophone and a hydrophone can be eliminated.Tests using synthetic and dual-sensor marine seismic streamer data showed that the proposed method could attenuate ghosts effectively while broadening bandwidth and providing high quality data for subsequent processing and interpretation.
作者
李洪建
刘定进
杨金龙
LI Hongjian;LIU Dingjin;YANG Jinlong(Sinopec Geophysical Research Institute,Nanjing 211103,China)
出处
《石油物探》
EI
CSCD
北大核心
2018年第2期248-253,共6页
Geophysical Prospecting For Petroleum
基金
国家重点研发计划(2017YFB0202904)资助~~
关键词
最小二乘反演
鬼波压制
双检采集
匹配滤波
噪声影响因子
宽频海洋地震
least squares inversion
deghosting
dual-sensor acquisition
matched filtering
noise level factor
broadband marine seismic exploration