G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/32 (2006.01)
Patent
CA 2432230
The invention relates to methods for prospecting wells using nuclear magnetic resonance. The inventive method consists in generating a static magnetic field near a well with the aid of a magnet which is made of a conductive rear-earth material in the form of an elongated parallelepiped which is magnetised in a direction perpendicular to a large side surface and longitudinal axis thereof. The width of the magnet is of at least twice as large as the narrow side of said parallelepiped. A radio-frequency coil is arranged on a frame whose diameter is equal to or higher than a diagonal of the cross-section of a magnet arranged inside the frame. The coil elements are arranged on planes which are parallel to the longitudinal axis of the magnet and vertical with respect to the smaller side thereof arranged in symmetrical sectors which are opposite to the large side surface of the magnet. A compensating unit is arranged along the large side surfaces of the magnet parallel to the longitudinal axis thereof.
L'invention concerne des procédés de diagraphie utilisant la résonance magnétique nucléaire. L'invention consiste à générer un champ magnétique statique près d'un puits, au moyen d'un aimant, à partir d'un matériau de terres rares conducteur, qui se présente comme un parallélépipède allongé, aimanté perpendiculairement à sa surface latérale étroite et à l'axe longitudinal. La largeur de l'aimant est au moins deux fois supérieure à celle de la partie étroite. La bobine RF est bobinée sur une carcasse dont le diamètre est égal ou supérieur à la diagonale de la coupe transversale de l'aimant qui se trouve à l'intérieur de la carcasse. Les spires de la bobine se trouvent dans des plans parallèles à l'axe longitudinal de l'aimant et perpendiculaires à sa partie étroite, dans des secteurs symétriques opposés à la surface latérale large de l'aimant. Un dispositif de compensation est aménagé le long des surfaces latérales larges de l'aimant, parallèlement à l'axe longitudinal.
Barlyaev Vadim Jurjevich
Khamatdinov Rafis Takievich
Mityushin Evgeny Mikhailovich
Joint Stock Company Of Closed Type Scientific And Industrial Fir
Ridout & Maybee Llp
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