Method for processing borehole nmr logs to enhance the...

G - Physics – 01 – V

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G01V 3/32 (2006.01) G01V 3/34 (2006.01) G06F 19/00 (2011.01)

Patent

CA 2744480

A computer-implemented method and system for processing subsurface logs to enhance the continuity of physical property measurements. The method includes obtaining a set of measurement signals along a spatial or time domain from at least one sensor tool moving through a borehole which has traversed through a subsurface region. The method additionally includes performing a global inversion of the set of measurement signals along the spatial or time domain to determine a set of physical properties of the subsurface region having a smooth variation along the spatial or time domain, wherein the set of physical properties can be utilized to determine characteristics of the subsurface region.

L'invention concerne un procédé et un système informatisés destinés au traitement de diagraphies de sous-sol afin d'améliorer la continuité de mesures de propriétés physiques. Le procédé comporte une étape consistant à obtenir un ensemble de signaux de mesure le long d'un domaine spatial ou temporel à partir d'au moins un outil à capteur(s) se déplaçant à travers un trou de sonde qui a traversé une région du sous-sol. Le procédé comporte de plus une étape consistant à effectuer une inversion globale de l'ensemble de signaux de mesure sur le domaine spatial ou temporel afin de déterminer un ensemble de propriétés physiques de la région de sous-sol présentant une variation régulière sur le domaine spatial ou temporel, l'ensemble de propriétés physiques pouvant être utilisé pour déterminer des caractéristiques de la région de sous-sol.

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