应用宽带Ricker子波的期望目标频谱整形

以地震子波整形为核心的谱白化方法是现今叠后地震数据高分辨率处理的常用方法,而期望的子波形态也一直倍受关注。与带限子波、经典Ricker子波等常用整形子波相比,宽带Ricker子波因其旁瓣能量弱、相同主瓣宽度下的分辨率较Ricker子波高等特点而在地震数据处理中得到广泛应用。通过设计综合衡量分辨率与保真度的参数（R）并搜寻其极值点,确定有限带宽下宽带Ricker子波的最佳形态,进而提出基于宽带Ricker子波的均衡子波,指导叠后数据的地震子波整形。理论模型和实际数据处理结果均表明,所提均衡子波为地震资料的高分辨率和高保真度处理提供了新的参考途径。

Spectrum shaping of desired targets based on broadband Ricker wavelets

Spectrum whitening based on seismic wavelet shaping is a common method for high-resolution post-stack seismic processing,and the desired wavelet shape has always been a much hotter topic.Compared with band-limited wavelet,Ricker wavelet and other commonly used shaping wavelets,broadband Ricker wavelet is widely used in seismic data processing on account of its weaker sidelobe energy and higher resolution at the same main lobe width than Ricker wavelet.By designing the parameter(R) that takes into account resolution and fidelity and searching for the extreme point,the optimal shape of the broadband Ricker wavelet with a limited bandwidth is determined,and then a ba-lanced wavelet based on broadband Ricker wavelet is proposed to guide wavelet shaping of post-stack data.Model and field data have proved that the balanced wavelet provides a new reference to seismic processing with high resolution and high fidelity.