Joint compression of multiple echo trains using principal...

Details Joint compression of multiple echo trains using principal... Joint compression of multiple echo trains using principal...

G - Physics

01

V

G01V 3/14 (2006.01) E21B 47/00 (2006.01) G01N 24/08 (2006.01)

Patent

CA 2711494

NMR spin echo signals are acquired downhole. Principal Component Analysis is used to represent the signals by a weighted combination of the principal components and these weights are telemetered to the surface. At the surface, the NMR spin echo signals are recovered and inverted to give formation properties.

Selon l'invention, des signaux d'échos de spin de résonance magnétique nucléaire (RMN) sont acquis en fond de trou. Une Analyse de Composantes Principales est utilisée pour représenter les signaux par une combinaison pondérée des composantes principales et ces pondérations sont télémétrées à la surface. À la surface, les signaux d'échos de spin de RMN sont récupérés et inversés pour donner des propriétés de formation.

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