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《Chinese Journal of Geophysics》 2014-02
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Quality factor characteristics of six metamorphic kinds of coals

XU Xiao-Kai;WANG Yun;MENG Zhao-Ping;College of Geoscience and Surveying Engineering,China University of Mining & Technology(Beijing);Institute of Geochemistry,Chinese Academy of Sciences;China University of Geosciences(Beijing);  
Lab ultrasonic measurements to metamorphic kinds of coal reveal the relationship between maximum vitrinite reflectance and ultrasonic quality factor.And then the relations between ultrasonic velocities and quality factors,including the anisotropic characteristics of quality factors are analyzed.The results show that there are a good linear correlation between the maximum vitrinite reflectance and P-and S-wave quality factor,quality factors and velocities in vertical direction,the P-wave quality factor and S-wave′s in vertical direction.Moreover,there are stronger anisotropies in seismic quality factors than velocities.Comparison of the measured Swave Q values with estimated values based on a theoretical formula indicates an only 7.2%relative error in this method.It proves that this theoretical formula can be applied to attenuation compensation of the converted shear wave in processing of multi-component seismic data.
【Fund】: 国家自然科学基金项目(41172145 41372163);; 国家重大专项“大型油气田与煤层气开发”(2011ZX05035-001-006HZ、002-003HZ 008-006-22 049-01-02 019-003);; 中国科学院矿床地球化学国家重点实验室“十二五”项目群(SKLODG-ZY125-01)联合资助
【CateGory Index】: P631.4;TD163.1
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