Device and method for transmitting acoustic wave into...

G - Physics – 01 – V

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G01V 1/04 (2006.01) G01V 1/143 (2006.01) G01V 1/16 (2006.01) G01V 1/42 (2006.01) G01V 1/52 (2006.01) G01V 11/00 (2006.01)

Patent

CA 2255719

On the transmitting side, a piezoelectric device (34) is so provided that the transmission direction is vertical to the wall of an exploration well (12). An anvil (42) provided on the exploration hole wall side of the piezoelectric device is pressed against the wall of the investigation well by a clamping mechanism (64). On the receiving side, the upper and lower parts of an exploration well (112) are closed with a packer (182) and a shut-off valve (180) to block the flow of fluid, and a cable (150) above a receiver is fixed to the wall of the exploration well by a clamping mechanism (164) to reduce noise propagated through the cable. The measured depth and the distance between the exploration wells in oil exploration and soil survey using acoustic tomography can be increased and the applicable range can be widened.

Du côté émission, un dispositif piézoélectrique (34) est agencé de manière que la direction d'émission soit verticale par rapport à la paroi d'un puits d'exploration (12). Une enclume (42) placée sur la face de la paroi du trou d'exploration du dispositif piezoélectrique est pressée contre la paroi du puits de recherche par un mécanisme de serrage (64). Du côté réception, les parties supérieure et inférieure d'un puits d'exploration (112) sont fermées par un packer (182) et une vanne d'obturation (180) afin de bloquer l'écoulement de fluide, et un câble (150) situé au-dessus d'un récepteur est fixé à la paroi du puits d'exploration par un mécanisme de serrage (164) afin de réduire le bruit propagé à travers le câble. On peut augmenter la profondeur mesurée ainsi que la distance entre les puits d'exploration en exploration pétrolière et dans l'étude du sol par tomographie acoustique, on peut aussi élargir l'échelle applicable.

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