Measurement of hydraulic conductivity using a radioactive or...

G - Physics – 01 – V

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G01V 5/14 (2006.01) E21B 47/10 (2006.01) G01V 5/04 (2006.01) G01V 5/10 (2006.01)

Patent

CA 2644452

A method of determining the distance, from a reference point, of a tracer emitting radiation comprising a first component emitted at a first known energy level and a second component emitted at a second known energy level, the intensity of a penetrating portion of the first component that penetrates a substance between the tracer and the reference point and the intensity of a penetrating portion of the second component of the radiation that penetrates the substance being a function of the rate of gamma radiation emission of the tracer as well as of the distance of the tracer from the reference point, the method comprising: a) measuring the intensity of the first penetrating portion and the intensity of the second penetrating portion; b) determining the ratio of the intensity of the first penetrating portion to the intensity of the second penetrating portion; and c) determining the distance of the tracer from the reference point.

L'invention concerne une méthode de détermination de la distance, depuis un point de référence, d'un marqueur émettant des radiations et comprenant un premier élément émis à un premier niveau d'énergie connu et un second élément émis à un second niveau d'énergie connu, l'intensité de la partie pénétrante du premier élément qui pénètre une substance entre le marqueur et le point de référence et l'intensité de la partie pénétrante du second élément de radiation qui pénètre la substance étant fonction de l'activité de rayonnement gamma du marqueur ainsi que de la distance du marqueur par rapport au point de référence. La méthode comprend les étapes consistant à : a) mesurer l'intensité de la première partie pénétrante et l'intensité de la seconde partie pénétrante; b) déterminer le rapport de l'intensité de la première partie pénétrante à l'intensité de la seconde partie pénétrante ; et c) déterminer la distance du marqueur par rapport au point de référence.

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