高分辨率去噪处理模块的去噪能力分析

Ability analyses of noise suppression in high resolution noise suppression handling model

针对岩土工程地震勘察资料存在的信噪比低的问题 ,对地震资料处理方法进行详细探讨 ,研制了时间域预测滤波、时间域倾角扫描迭加去噪、K -L变换去噪和频域约束下最小熵反褶积去噪高分辨率特殊处理模块 ,对理论地震模型和实际地震记录进行去噪处理 ,通过处理前后地震记录的品质分析和信噪比估计 ,详细分析各模块的去噪处理效果 ,并总结出岩土工程地震资料进行去噪处理的最佳模块和最佳流程 .

The methods of processing the seismic data with the problems of the low signal-to-noise ration in geo-technical engineering seismic investigation data are discussed in this paper. The high resolution special processing models in the time-domain prediction filtering, the noise suppression by the dip sweeping stacked in the time-domain, the noise suppression by the K-L transformation and the minimum entropy de-convolution constrained in frequency domain are developed. And theoretical seismic models and the actual seismic records for noise suppression are processed. By analyses of quality for seismic records pre-processed and post-processed and evaluation of signal-to-noise ratio, the effect of noise suppression of models are obtained. The best model and processing flow of noise suppression for geo-technical engineering seismic investigation data are summarized.