The acoustic problem of an eccentric drill collar in a fluid-filled borehole has been of interest
in the field of acoustic logging while drilling (ALWD) in recent years. To reduce the effects of …

We describe a numerical study to quantify the influence of tool‐eccentricity on wireline (WL)
and logging‐while‐drilling (LWD) sonic logging measurements. Simulations are performed …

The far-field asymptotic solutions to the wave field excited by an eccentric point source in a
fluid-filled borehole are derived by the steepest descent integration method. When there is a …

Radiation and reception responses of a dipole acoustic logging tool placed eccentrically in
borehole fluid are an interesting and important topic in acoustic reflection imaging. Herein …

Abstract The Xaminer Sonic is a new wireline acoustic logging tool that represents the
culmination of 4 years of computer modeling, engineering, lab testing, field surveys, and …

This paper evaluates feasibility of three-dimensional sonic reverse-time migration (RTM)
based on the spectral element method (SEM). A GPU based algorithm capable of …

We present an approach, based on cross-coupling of quadrupole and monopole borehole
acoustic modes caused by anisotropy, to investigate the in situ stress state, a critical …

We review the methods of simulating elastic wave propagation in a borehole. We
considered two different approaches: a quasi-analytic approach using the Discrete …

We have developed a new method to process and interpret sonic waveforms acquired in
high-angle (HA) and horizontal (HZ) wells in the vicinity of layer boundaries. Numerical …

通过最速下降积分法获得了充液井孔中偏心点声源激发的井外波场的远场渐**解;
利用互易性获得井外存在反射体时井内偏心接收的波场渐**解, 渐**解结果与有限差分的结果 …