Measuring and testing – Vibration – By mechanical waves
Patent
1989-02-14
1990-04-03
Chapman, John
Measuring and testing
Vibration
By mechanical waves
367 35, G01N 2900
Patent
active
049129791
ABSTRACT:
A novel method for detecting and measuring elastic anisotropy in a sample of the earth's formations is provided. A dyad of time series signal representative of the sample's response to imparted shear waves is recorded. The dyad of time series signals can then be processed to detect and measure elastic anisotropy in the sample. More particularly, the dyad of time series signals are collected by imparting shear waves having first and second polarizations into the samples with a shear wave transducer and recording the sample's response to each of the imparted shear waves by shear wave transducers having first and second polarizations. In one embodiment of the invention, the dyad of time series signals can be diagonalized to detect and measure elastic anisotropy in the sample. In another embodiment, the dyad of time series signals can be processed for a plurality of rotation angles and the resulting rotated dyad of time series signals can be displayed to detect and measure elastic anisotropy in the sample.
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Yariv, A., "Optical Electronics 3rd Ed." 1985, pp. 10-11.
Alford Richard M.
Rai Chandra S.
Sondergeld Carl H.
Amoco Corporation
Chapman John
Fess Lawrence
Stanley Timothy D.
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