Schlumberger Technology Corporation

John Adam Donald

Nicholas N Bennett

Erik Wielemaker

Florian Karpfinger

Jeroen Jocker

Nobuyasu Hirabayashi

Cheolkyun Jeong

Takeshi Endo

Boxian Jing

Asbjoern Lund Johansen

Yevgeniy Karpekin

Embodiments provide for a method that utilizes the azimuthally spaced receivers of a sonic logging tool. Signals from monopole and dipole sources are reflected from the geologic interfaces and recorded by arrays of receivers of the same tool. For the incident P-waves from the monopole source, phase arrival times for the azimuthal receivers are compensated for stacking using properties of wave propagation in the borehole, and for the incident SH-waves from the dipole source, signs of waveforms for the receivers are changed for specified azimuths.

Beamform processing for sonic imaging using monopole and dipole sources

A method includes receiving information that includes elastic property information and that includes sonic data acquired via a tool disposed at a plurality of depths in a bore in a subterranean environment that includes at least one anisotropic formation; processing the information to generate processed information where the processed information includes variance information associated with the elastic property information and where the processed information includes velocity information and orientation information associated with the sonic data; performing an inversion based at least in part on the processed information; and outputting values for elastic parameters based at least in part on the inversion.

Elastic parameter estimation

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Abu Dhabi, United Arab Emirates

John Adam Donald