Acoustoelastic effects on mode waves in a fluid-filled pressurized   borehole in triaxially stressed formations

doi:10.1007/s10409-006-0033-6

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	Acoustoelastic effects on mode waves in a fluid-filled pressurized borehole in triaxially stressed formations
	Li, Ping&apos ; Yin, Youquan ; Su, Xianyue ; en
刊名	acta mechanica sinica
	2006
关键词	triaxial terrestrial stress borehole fluid pressure fluid nonlinear effect acoustoelasticity dispersion curve crossover FLEXURAL WAVES ANISOTROPY
DOI	10.1007/s10409-006-0033-6
英文摘要	Based on the nonlinear theory of acoustoelasticity, considering the triaxial terrestrial stress, the fluid static pressure in the borehole and the fluid nonlinear effect jointly, the dispersion curves of the monopole Stoneley wave and dipole flexural wave propagating along the borehole axis in a homogeneous isotropic formation are investigated by using the perturbation method. The relation of the sensitivity coefficient and the velocity-stress coefficient to frequency are also analyzed. The results show that variations of the phase velocity dispersion curve are mainly affected by three sensitivity coefficients related to third-order elastic constant. The borehole stress concentration causes a split of the flexural waves and an intersection of the dispersion curves of the flexural waves polarized in directions parallel and normal to the uniaxial horizontal stress direction. The stress-induced formation anisotropy is only dependent on the horizontal deviatoric terrestrial stress and independent of the horizontal mean terrestrial stress, the superimposed stress and the fluid static pressure. The horizontal terrestrial stress ratio ranging from 0 to 1 reduces the stress-induced formation anisotropy. This makes the intersection of flexural wave dispersion curves not distinguishable. The effect of the fluid nonlinearity on the dispersion curve of the mode wave is small and can be ignored.; Engineering, Mechanical; Mechanics; SCI(E); EI; 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 1; ARTICLE; 6; 569-580; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/251193]
专题	工学院
推荐引用方式 GB/T 7714	Li, Ping&apos,Yin, Youquan,Su, Xianyue,et al. Acoustoelastic effects on mode waves in a fluid-filled pressurized borehole in triaxially stressed formations[J]. acta mechanica sinica,2006.
APA	Li, Ping&apos,Yin, Youquan,Su, Xianyue,&en.(2006).Acoustoelastic effects on mode waves in a fluid-filled pressurized borehole in triaxially stressed formations.acta mechanica sinica.
MLA	Li, Ping&apos,et al."Acoustoelastic effects on mode waves in a fluid-filled pressurized borehole in triaxially stressed formations".acta mechanica sinica (2006).