Method for determining the water saturation of an...

G - Physics – 01 – V

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G01V 3/38 (2006.01)

Patent

CA 2591484

A method for determining the water saturation of an underground formation traversed by a borehole, the method comprising: - determining a first parameter (~) that is representative of the critical exponent of the electrical conductivity of the formation; determining a second parameter (Wc or Sc or ~c) that is representative of the formation percolation threshold; - measuring a first set of formation properties; and - combining said first set of formation properties, first and second parameters in order to determine the water saturation (Sw) of said underground formation.

La présente invention se rapporte à un procédé permettant de déterminer le degré de saturation en eau d'une formation souterraine traversée par un puits de forage. Le procédé selon l'invention consiste : à déterminer un premier paramètre (?), représentatif de l'exposant critique de la conductivité électrique de la formation ; à déterminer un second paramètre (Wc, Sc ou fc), représentatif du seuil de percolation de la formation ; à mesurer un premier ensemble de propriétés de la formation ; et à combiner lesdits premier ensemble de propriétés de la formation, premier paramètre et second paramètre, afin de déterminer le degré de saturation en eau (Sw) de ladite formation souterraine.

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