Comparison of stress-associated coda attenuation and intrinsic attenuation from ultrasonic measurements

doi:10.1111/j.1365-246X.2009.04159.x

	Comparison of stress-associated coda attenuation and intrinsic attenuation from ultrasonic measurements
	Guo, Meng-Qiu 1; Fu, Li-Yun 1; Ba, Jing 2
刊名	GEOPHYSICAL JOURNAL INTERNATIONAL
	2009-07-01
卷号	178 期号:1 页码:447-456
关键词	Fourier analysis Body waves Seismic attenuation Wave scattering and diffraction Wave propagation
ISSN号	0956-540X
DOI	10.1111/j.1365-246X.2009.04159.x
文献子类	Article
英文摘要	Seismic wave attenuation has been proved to be an indicator of stress changes in rocks. Seismic coda, as a superposition of incoherent scattered waves, is known to reflect small-scale random heterogeneities in the Earth medium. It contains information on stress changes of the Earth's interior, as a result of changes in the physical state of materials. In this paper, we measure ultrasonic properties of rocks under different effective stresses to study the effect of pore-pressure induced stress changes on coda attenuation as a combination of intrinsic attenuation and scattering attenuation. We investigate the stress-associated coda attenuation quality factors Q(PC) and Q(SC) as a function of frequencies and characterize its scale dependence on stress variations in rocks by comparing with the intrinsic attenuation quality factors Q(P) and Q(S), calculated from ultrasonic measurements. Comparisons of the P- and S-coda attenuations versus frequencies under different effective stresses demonstrate that the scattering of the S-coda is much stronger because of its shorter wavelength. The intrinsic and coda attenuations versus stress variations present quite different non-linear features, where Q(P), Q(S), Q(PC) and Q(SC) increase with increasing effective stress, but Q(PC) and Q(SC) show a greater sensitivity to pore pressure than Q(P) and Q(S).
WOS关键词	SEISMIC CODA ; ANELASTIC ATTENUATION ; FREQUENCY-DEPENDENCE ; ELASTIC PROPERTIES ; SATURATED ROCKS ; PORE PRESSURE ; UNITED-STATES ; RANDOM-MEDIA ; LONG-VALLEY ; SCATTERING
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY-BLACKWELL PUBLISHING, INC
WOS记录号	WOS:000266979600026
资助机构	National Nature Science Foundation of China(40674030) ; National Nature Science Foundation of China(40674030) ; National Basic Research Program of China(2007CB209505) ; National Basic Research Program of China(2007CB209505) ; National Nature Science Foundation of China(40674030) ; National Nature Science Foundation of China(40674030) ; National Basic Research Program of China(2007CB209505) ; National Basic Research Program of China(2007CB209505) ; National Nature Science Foundation of China(40674030) ; National Nature Science Foundation of China(40674030) ; National Basic Research Program of China(2007CB209505) ; National Basic Research Program of China(2007CB209505) ; National Nature Science Foundation of China(40674030) ; National Nature Science Foundation of China(40674030) ; National Basic Research Program of China(2007CB209505) ; National Basic Research Program of China(2007CB209505)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70682]
专题	中国科学院地质与地球物理研究所
通讯作者	Guo, Meng-Qiu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing, Peoples R China 2.CNPC, Dept Geophys, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Guo, Meng-Qiu,Fu, Li-Yun,Ba, Jing. Comparison of stress-associated coda attenuation and intrinsic attenuation from ultrasonic measurements[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2009,178(1):447-456.
APA	Guo, Meng-Qiu,Fu, Li-Yun,&Ba, Jing.(2009).Comparison of stress-associated coda attenuation and intrinsic attenuation from ultrasonic measurements.GEOPHYSICAL JOURNAL INTERNATIONAL,178(1),447-456.
MLA	Guo, Meng-Qiu,et al."Comparison of stress-associated coda attenuation and intrinsic attenuation from ultrasonic measurements".GEOPHYSICAL JOURNAL INTERNATIONAL 178.1(2009):447-456.