G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 1/40 (2006.01) G01V 1/50 (2006.01)
Patent
CA 2711848
A method for determining permeability of a porous medium of a formation, the method including: placing a logging instrument into a borehole that traverses the porous medium, the borehole filled with a borehole fluid; measuring a pressure, p^\ of an acoustic wave in the borehole at about a boundary between the porous medium and the borehole, the acoustic wave comprising a frequency that is about a resonant frequency of a system that includes the borehole and the porous medium; calculating the permeability from the pressure; and providing the permeability as output to a user.
La présente invention concerne un procédé permettant de déterminer la perméabilité d'un milieu poreux d'une formation. Selon ce procédé, on commence par placer un instrument à diagraphie dans un trou de sonde traversant le milieu poreux, le trou de sonde étant rempli d'un fluide de forage. On mesure ensuite une pression d'une onde acoustique dans le trou de sonde aux environs d'une limite entre le milieu poreux et le trou de sonde, l'onde acoustique comportant une fréquence se situant autour d'une fréquence de résonance d'un système qui inclut le trou de sonde et le milieu poreux. Connaissant la pression, il ne reste plus qu'à calculer la perméabilité et à fournir en sortie à l'utilisateur le résultat du calcul.
Dorovsky Vitaly N.
Dubinsky Vladimir
Fedorov Alexander I.
Baker Hughes Incorporated
Sim & Mcburney
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