Journal of Jilin University(Earth Science Edition). 2014, (01) Core

Estimation of P-and S-Waves Quality Factors Based on the Formula of the Wave-Field Continuation in Modified Kolsky ModelChinese Full Text

Feng Xuan;Zhang Jin;Liu Cai;Zhang Yan;Wang Yanguo;College of GeoExploration Science and Technology,Jilin University;College of Nuclear Engineering and Geophysics,East China Institute of Technology;College of Earth Sciences,Jilin University;

Abstract: The quality factor describing stratigraphic absorption,which is an important physical parameter in joint inversion of PP-and PS-waves,plays an important role in the prediction of subsurface petrophysical parameters and oil and gas.On account of the physical mechanism of wave-field continuation in modified Kolsky model,and the method of calculating travel time in each layer proposedby Zhang and Ulrych,We present a method for estimating P-and S-waves quality factors based on the formula of the wave-field continuation in modified Kolsky model.We estimate a series of Qvalues by linear-fitting between the frequency and the logarithm of the amplitude spectrum ratio between different seismic traces,and then we obtain the Qvalue of each layer by selecting the better Qvalues and taking the average of them.In the model tests,the errors between theoretical Qvalues of P-and S-waves and their estimated Qvalues using this method are less than 2%.It shows that the Qvalues estimated by this method are correct and the estimated results are accurate.We apply this method to real seismic data,and get reasonable estimating results of P-waves Qvalue.

Keywords：

modified Kolsky model; estimating Qvalue; amplitude spectrum ratio; linear-fitting;

DOI：
10.13278/j.cnki.jjuese.201401305
Series：
Subject：
Classification Code：
P631.4

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Estimation of P-and S-Waves Quality Factors Based on the Formula of the Wave-Field Continuation in Modified Kolsky ModelChinese Full Text

Feng Xuan;Zhang Jin;Liu Cai;Zhang Yan;Wang Yanguo;College of GeoExploration Science and Technology,Jilin University;College of Nuclear Engineering and Geophysics,East China Institute of Technology;College of Earth Sciences,Jilin University;

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