L_1相关速度谱

VELOCITY SPECTRUM WITH L_1 CORRELATION

本文提出了L_p相关的基本概念、定义及性质。特别分析了P=1的L_1相关与普通相关不同的特点,并将之应用于地震信号速度谱分析。本文分析了速度信息寄载于地震记录中的基本特点,并采用L_1相关技术进行速度分析。结果表明,它比普通相关及符号位相关能更充分地提取地震信号中的速度信息,从而提高速度谱的质量和抗干扰能力。L_1相关不用乘法运算,因而大大减少了运算量。 使用新方法和普通方法对理论模型和实际地震信号进行对比研究,结果说明新方法的改善效果是明显的。

This paper introduces the conception and definition of Lp correlation. Particularly, the L1 correlation is investigated by comparison with the common correlation and the different properties of the L1 correlation are pointed out.After analysing the general properties about how the velocity information is carried in the seismic data, we choose the L1 correlation for the velocity analysis in order to get more velocity information than the common correlation methods. The L1 correlation method improves the accuracy and robustness of velocity spectrum. Another advantage of the L1 correlation is reduction of the computer burden. The synthetic data and some seismic data are used to compare the results of the L1 correlation velocity spectrum with the common methods, the results by the new method illustrate the obvious improvements.