Application and comparison of dispersion analysis methods applied to array wave data

作     者：Cao Zhengliang Wang Kexie School of Physics Jilin University Changchun China Wang Fei Computer Science and Technology Fudan University Shanghai China Xie Ronghua Test and Technology Services Corporation of Daqing Daqing China 

会议名称：《CPS/SEG 2004 International Geophysical Conference》

会议日期：2004年

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

摘      要：正 Through applying to treatment of synthetic and field data, respectively, three methods, Prony’ s method, homomorphic processing, and weighted spectral semblance, of dispersion analysis applied to array acoustic logging data are studied and compared, and the results are good and acceptable. All three methods work in the frequency domain and yield slowness （the reciprocal of velocity ） estimate. Weighted spectral semblance is a simple dispersion analysis method, which can only be used to estimate a slowness of single mode at every frequency, and is better anti-noise than other methods for estimating slowness alone. Homomorphic processing method can be used to estimate attenuation, amplitude, and phase as well as velocity, simultaneously. But it is only suitable to estimate single mode at every frequency. Prony’s method can be applied to estimate attenuation, amplitude, and phase velocity. Introducing SVD-TLS method to judge the rank of modes at every frequency, above parameters of more than single mode at every frequency can be estimated effectively.