Abstract:

In order to solve the problems such as large computation and high requirement of geometry in the traditional 2D ISS (inverse scattering series) method, the 1.5D ISS deghosting method is proposed after dimensionality reduction from 2D ISS method. The examples of data study show that the 1.5D method can save lots of calculation and also degrade the requirement of geometry. 1.5D ISS method does not need any subsurface information and wavelet estimation, and it is suitable for different kinds of complex structure and low signal to noise ratio seismic data. Besides, the 1.5D ISS method can remove the ghosts from marine seismic data effectively and enhance resolution; simultaneously it will expand the frequency band and compensate the null frequencies energy.

Key words: inverse scattering series, marine seismic exploration, deghosting, null frequency

摘要：

针对传统2维逆散射方法计算量大、对观测系统要求高等问题, 将2维逆散射级数方法降维, 得到1.5维逆散射级数消除鬼波的算法。资料处理结果表明, 1.5维方法减少了计算量, 降低了对观测系统的要求, 不需要地下介质信息以及子波估计, 适用于各种复杂的介质情况和低信噪比数据, 可以有效地消除海上地震资料的鬼波, 提高分辨率, 补偿陷波频率处的能量, 提升地震资料的低频成分。

关键词: 逆散射级数, 海上地震勘探, 鬼波消除, 陷波频率