Nonaxisymmetric acoustic field excited by a cylindrical tool placed off a borehole axis and extraction of shear wave

	Nonaxisymmetric acoustic field excited by a cylindrical tool placed off a borehole axis and extraction of shear wave
	Dong, QD; Zhang, BX; Wang, KX
刊名	JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
	1996-02-01
卷号	99 期号:2 页码:682-690
ISSN号	0001-4966
文献子类	Article
英文摘要	The nonaxisymmetric acoustic field excited by a cylindrical tool placed off the axis of a fluid-filled borehole is investigated. It is shown that the acoustic fields are composed of infinite numbers of the multipole fields with different orders. In cases in which the medium outside the borehole is an isotropic homogeneous elastic solid and a two-phase medium, the dispersion and excitation of the mode waves such as Stoneley waves, pseudo-Rayleigh waves, flexural waves, and screw waves are studied. The full waveforms in the time domain are also simulated and analyzed. It is pointed out that the components of the symmetric and nonsymmetric acoustic fields could be strengthened or weakened by adding and subtracting the two full waveforms logged in some opposite azimuths in a horizontal plane. A method of extraction of the shear wave is presented, and the relationship of the nonsymmetric acoustic field to the shear wave logging is analyzed. (C) 1996 Acoustical Society of America.
WOS关键词	FLUID-FILLED BOREHOLES ; DIPOLE SOURCES ; MULTIPOLE SOURCES
WOS研究方向	Acoustics ; Audiology & Speech-Language Pathology
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:A1996TU68000004
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/12641]
专题	中国科学院武汉物理与数学研究所
通讯作者	Zhang, BX
作者单位	CHINESE ACAD SCI,WUHAN INST PHYS,WUHAN 430071,PEOPLES R CHINA
推荐引用方式 GB/T 7714	Dong, QD,Zhang, BX,Wang, KX. Nonaxisymmetric acoustic field excited by a cylindrical tool placed off a borehole axis and extraction of shear wave[J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,1996,99(2):682-690.
APA	Dong, QD,Zhang, BX,&Wang, KX.(1996).Nonaxisymmetric acoustic field excited by a cylindrical tool placed off a borehole axis and extraction of shear wave.JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,99(2),682-690.
MLA	Dong, QD,et al."Nonaxisymmetric acoustic field excited by a cylindrical tool placed off a borehole axis and extraction of shear wave".JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 99.2(1996):682-690.