基于峰值因子最大化的鬼波压制方法

针对传统拖缆采集得到的海上地震资料受鬼波影响而导致频带宽度变窄,笔者提出一种去鬼波方法,可以压制鬼波效应,拓宽频带。首先在频率-空间域推导出镜像数据生成公式,并基于峰值因子最大化的参数搜索方法来估计最优的鬼波延迟时间,将最优的鬼波延迟时代入镜像记录生成公式,获得最优的镜像记录,利用联合反褶积算法得到最优的去鬼波结果。将本文中的方法应用于模拟的变深度采集数据和海上实测的变深度采集数据,证实该方法可以有效地压制鬼波,消除频谱中的陷波点,得到宽频数据。

Deghosting method based on maximization of peak factor

Aiming at the frequency bandwidth of the marine seismic data acquired by conventional streamer acquisition narrowing down，which is affected by ghost，this paper put forward a deghosting method which can sup- press the ghost and widen the frequency band． Firstly，the formula to produce mirror records was derived in fre- quency-space domain and the authors estimated the best delay time of ghost by using parameter search method based on maximization of peak factor． Then the optimal delay time was taken into the formula to produce formula and obtain optimal mirror data． Ultimately，the optimal deghosted output can be calculated by using joint deconvo- lution algorithm． Applying the method to simulative variable depth data and marine variable-depth streamer data，it was showed that this deghosting method could suppress the ghost，reduce the spectral notches and acquire wider- band data．