连续子波反射叠加合成地震记录方法

Synthetic seismic recording method by the continuous wavelet-reflection superposition

针对应用褶积模型不能有效制作任意薄层合成地震记录的难题,提出了对界面反射子波在地表进行振幅叠加的合成地震记录制作的方法。该方法的主要思想就是依据合成地震记录任意时刻在地面的振幅为来自地下反射界面振幅叠加的基本物理原理,通过对各界面反射子波在地表作用延续时间的分析,确定某一时刻对合成记录有作用的界面,并将各界面反射子波在地表作用的强度进行叠加实现合成地震记录的制作。结果表明,应用该制作合成地震记录的方法避免了时间域反射系数重采样丢失反射界面的可能,有效地提高了合成地震记录的精度,为高精度合成地震记录的制作增添了新的方法手段。

In the light of the problem that the applied convolution model can not effectively make arbitrary thin-layer seismic record,thus the making method of synthesizing the seismic record was developed by superimposing the amplitude of the interface reflection wavelet on the surface.The main idea of this method is based on the basic physical principle of the synthetic seismic records at any time in the ground amplitude from the overlaid underground reflection one,through the acting duration time analyses of each interface's reflection wavelet on the ground,the interface acting on the synthetic seismogram at a certain moment was determined,and furthermore by means of the superposition of the intensity of each interface's reflection wavelet acting on the ground,the compilation and production of the synthetic seismic records can be realized.The results show that the application of this compiling method has prevented the possibility of losing the reflection interface during the time-domain reflection coefficient re-sampling,and furthermore it can effectively improve the precision of the synthetic seismic record and add the new method for the compilation and production of the high-precision synthetic seismic record.