Acoustoelastic effects of Stoneley waves in a borehole surrounded by a transversely isotropic elastic solid

作者：Liu Jinxia; Cui Zhiwen^*; Cao Zhengliang; Wang Kexie

来源：AIP Advances, 2014, 4(11): 117136.

DOI：10.1063/1.4902896

Stoneley wave in a fluid-filled pressurized borehole surrounded by a transversely isotropic elastic solid with nine independent third-order elastic constants in presence of biaxial stresses are studied. A simplified acoustoelastic formulation of Stoneley wave is presented for the parallelism of the borehole axis and the formation axis of symmetry. Sensitivity coefficients and velocity dispersions for Stoneley wave due to the presence of stresses are numerically investigated, respectively. The acoustoelastic formulation explicitly shows that the velocity dispersions of Stoneley wave depend on seven independent third-order elastic constants in presence of biaxial stresses and on six independent third-order elastic constants in the presence of borehole pressurization alone. Numerical results of both sensitivity coefficients and velocity dispersions of Stoneley wave show that at low frequency the velocity change of Stoneley wave is sensitive to c(111) and c(112). Stoneley wave velocity at low frequencies can be simplified by 3 independent third order elastic constants (c(111), c(112) and c(123)) in stead of nine constants. In presence of biaxial stresses, at low frequencies the speed of the Stoneley wave is similar to White's formula.

• 出版日期2014-11
• 单位吉林大学