Low frequency formation shear slowness from drilling noise derived quadrupole array data
AssigneeBaker Hughes Incorporated
InventorsTheodorus W. Geerits, Douglas J. Patterson
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AssigneeBaker Hughes Incorporated
InventorsTheodorus W. Geerits, Douglas J. Patterson
Estimating the term…
The present disclosure is related to apparatuses and methods measuring and processing a characteristic of subsurface earth formations penetrated by a borehole. More specifically this present disclosure relates to a method and apparatus for measuring and processing an acoustic characteristic such as formation shear wave velocity of subsurface sonic waves after these waves traverse earth formations adjoining a borehole or passing through a portion of the subsurface. The apparatus may include: a bottomhole assembly, a drill bit configured to generate an acoustic signal, at least two acoustic detectors, and a processor. The acoustic signal may include a specific multipole signal that may propagate through an earth formation along the borehole. The method may include use of the apparatus, including steps for estimating a shear velocity of the acoustic signal using signals from the at least two acoustic detectors.
An apparatus configured to evaluate an earth formation, the apparatus comprising:
A method for evaluating an earth formation, comprising:
A non-transitory computer-readable medium product having stored thereon instructions that, when executed by at least one processor, perform a method, the method comprising:
Dependencies are inferred from the claim text.