G - Physics – 01 – N
Patent
G - Physics
01
N
349/14
G01N 29/00 (2006.01) G01N 29/07 (2006.01) G01N 33/24 (2006.01)
Patent
CA 1308802
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 sig- nals 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 rota- tion angles and the resulting rotated dyad of time series signals can be displayed to detect and measure elastic anisotropy in the sample.
568373
Alford Richard M.
Rai Chandra S.
Sondergeld Carl H.
Amoco Corporation
Gowling Lafleur Henderson Llp
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