Monitoring a microseismic event

Details Monitoring a microseismic event Monitoring a microseismic event

G - Physics

01

V

G01V 1/30 (2006.01) E21B 47/12 (2006.01) G01V 1/00 (2006.01) G01V 1/36 (2006.01) G01V 1/40 (2006.01)

Patent

CA 2445703

A method of monitoring a microseismic event comprises detecting the event to produce a first signal dependent on the event, the first signal including noise at a frequency off Hz (e.g. 50 Hz); taking a first sample of the first signal; taking a second sample of the first signal, the second sample occurring n/f seconds after the first sample, where n is an integer (e.g. 1); and subtracting the first and second samples from each other to produce a further signal dependent on the event in which the noise has been at least partly compensated for.

Une méthode de surveillance d'un événement microsismique comprend la détection de l'événement pour produire un premier signal dépendant de l'événement, le premier signal incluant un bruit à une fréquence en Hz (p. ex., 50 Hz); la mesure d'un premier échantillon du premier signal; la mesure d'un second échantillon du premier signal, le deuxième échantillon étant généré n/f secondes après le premier échantillon, et où n est un nombre entier (p. ex. 1); la soustraction du premier et du second échantillons l'un de l'autre pour produire un autre signal dépendant de l'événement dans lequel le bruit a été au moins partiellement compensé.

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