Abstract:

Based on marine single-component seismic data acquired by conventional acquisition method, the vertical component of velocity (pseudo-V_z) at the same position is estimated. The pseudo-V_z is then combined with the single component of pressure data to get the aim of deghosting. By applying the sparsity constraint deconvolution method as an intermediate procedure, improvements of shallow sea single-component seismic data in resolution as well as in filling the frequency notches, which are caused by the interference of the up- and downgoing waves at the receivers are achieved. In addition, the energy of low-frequency signal is enhanced. The proposed method can be used for re-processing the existing single-component data through which can broaden the frequency bandwidth.

Key words: shallow sea, pseudo velocity, sparsity constraint, deghosting

摘要：

采用基于用传统方法获取的海上单分量地震资料, 估算出同一位置速度的垂直分量(伪速度), 再与单分量压力数据联合, 达到压制鬼波的目的。将稀疏约束的反卷积方法作为鬼波压制的关键环节, 使得在浅海环境下, 由海水表面引起的检波器端上、下行波干涉产生的陷波问题得到改善, 同时低频能量得到增强, 提高了数据的分辨率。该方法可用于海上单分量压力数据的再处理, 拓宽数据的频带范围。

关键词: 浅海, 伪速度, 稀疏约束, 鬼波压制