Stress-Associated Intrinsic and Scattering Attenuation from Laboratory Ultrasonic Measurements on Shales

doi:10.1007/s00024-017-1705-9

	Stress-Associated Intrinsic and Scattering Attenuation from Laboratory Ultrasonic Measurements on Shales
	Hu, Junhua 1,2; Fu, Li-Yun 1,3; Wei, Wei 1; Zhang, Yan 1
刊名	PURE AND APPLIED GEOPHYSICS
	2018-03-01
卷号	175 期号:3 页码:929-962
关键词	Shales anisotropy and heterogeneity ultrasonic waves P- and S-coda intrinsic and scattering attenuation elastic Monte Carlo method
ISSN号	0033-4553
DOI	10.1007/s00024-017-1705-9
文献子类	Article
英文摘要	Seismic attenuation is sensitive to stress-induced subtle changes in the physical state of rocks. In this study, the stress- and frequency-associated attenuation is quantified through ultrasonic measurements on three differently oriented cylindrical shale samples under various axial stresses. As an improvement to the single-scattering model, the elastic Monte Carlo method is employed to investigate multiple-scattering attenuations by incorporating the boundary reflections and wave conversions. Our results show that, as the axial stress increases, the intrinsic attenuation decreases in all directions, while the scattering attenuation decreases slightly in the direction perpendicular to the bedding but increases largely and nonlinearly in other directions. These discrepancies result from different attenuation mechanisms. Both the intrinsic and scattering attenuation are found to be largest in the direction 45A degrees to the bedding, but least in the perpendicular direction. The S-wave attenuation is larger and more sensitive to stress changes than P-wave attenuation due to its shorter wavelength. As expected from sandstone examples, the scattering attenuation in shales is significantly larger and more sensitive to stress changes than the intrinsic attenuation. The frequency dependence of scattering attenuation suggests that the peak frequency with the maximum scattering attenuation is independent of axial stresses, but varies in different directions of an individual rock with different heterogeneity and anisotropy scales. The peak frequency of S-coda is smaller and its peak scattering attenuation is larger than P-coda. In conclusion, the stress and frequency dependence of ultrasonic attenuations in shales differ largely in various directions, indicating significant anisotropy and heterogeneity.
WOS关键词	MONTE-CARLO-SIMULATION ; RADIATIVE-TRANSFER THEORY ; SEISMIC-WAVE ATTENUATION ; ELASTIC-WAVES ; RANDOM-MEDIA ; SHEAR-WAVES ; CODA WAVES ; MULTIPLE-SCATTERING ; AMPLITUDE ATTENUATION ; SEISMOGRAM ENVELOPES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SPRINGER BASEL AG
WOS记录号	WOS:000426759700012
资助机构	Chinese Academy of Sciences(XDB10010400) ; Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(41604035) ; National Natural Science Foundation of China(41604035) ; China Postdoctoral Science Foundation(2016T90129) ; China Postdoctoral Science Foundation(2016T90129) ; Chinese Academy of Sciences(XDB10010400) ; Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(41604035) ; National Natural Science Foundation of China(41604035) ; China Postdoctoral Science Foundation(2016T90129) ; China Postdoctoral Science Foundation(2016T90129) ; Chinese Academy of Sciences(XDB10010400) ; Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(41604035) ; National Natural Science Foundation of China(41604035) ; China Postdoctoral Science Foundation(2016T90129) ; China Postdoctoral Science Foundation(2016T90129) ; Chinese Academy of Sciences(XDB10010400) ; Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(41604035) ; National Natural Science Foundation of China(41604035) ; China Postdoctoral Science Foundation(2016T90129) ; China Postdoctoral Science Foundation(2016T90129)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82964]
专题	中国科学院地质与地球物理研究所
通讯作者	Fu, Li-Yun
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Petr East China, Sch Geosci, Qingdao 266580, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Hu, Junhua,Fu, Li-Yun,Wei, Wei,et al. Stress-Associated Intrinsic and Scattering Attenuation from Laboratory Ultrasonic Measurements on Shales[J]. PURE AND APPLIED GEOPHYSICS,2018,175(3):929-962.
APA	Hu, Junhua,Fu, Li-Yun,Wei, Wei,&Zhang, Yan.(2018).Stress-Associated Intrinsic and Scattering Attenuation from Laboratory Ultrasonic Measurements on Shales.PURE AND APPLIED GEOPHYSICS,175(3),929-962.
MLA	Hu, Junhua,et al."Stress-Associated Intrinsic and Scattering Attenuation from Laboratory Ultrasonic Measurements on Shales".PURE AND APPLIED GEOPHYSICS 175.3(2018):929-962.