【摘要】 参数化模型地震子波提取中模型阶数的确定对子波提取的精度至关重要,笔者针对因果地震子渡MA、ARMA模型,总结了目前比较成熟的四类定阶方法:相关分析法、信息量准则法、线性代数法及基于优化算法的模型定阶方法,分析比较发现这些算法都存在不同程度的缺陷,只能在各自的适用范围内得到较好的定阶结果,针对算法在子波建模应用中的不足提出了改进建议;同时分析比较了基于高阶累积量的非因果系统模型定阶的各种方法,并对非因果地震子波模型定阶进行了展望.更多还原

【Abstract】 The choice of the order in modeling the seismic wavelet is very vital for the precision of the wavelet extraction.Based on the hypothesis that the wavelet model is MA or ARAM model which is causal,the author summarizes four broad categories of order determination to the wavelet estimation model,i.e.,the correlation analyse method,the information criterion method,the linear algebra method and the optimization-based method.Theoretical analysis shows that these methods have different levels’limitations.We can only get good order determination in the methods’ own applications.In view of the limitation of the above algorithms used in seismic wavelet estimation,the author puts forward recommendations for improvement.At the same time,the author analyses the different methods based on the high order cumulant of the order determination in the non-causal system model comparatively,and prospects for the order determination of the non-causal seismic wavelet model.更多还原