Use of minor borehole obstructions as seismic sources

Details Use of minor borehole obstructions as seismic sources Use of minor borehole obstructions as seismic sources

G - Physics

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G01V 1/40 (2006.01) G01V 1/135 (2006.01) G01V 1/143 (2006.01) G01V 1/42 (2006.01)

Patent

CA 2416669

An acoustic system and method using well bore tube wave energy (103), converted to body wave energy (CODA) (106), at minor bore hole obstructions and casing rings (105), as point sources of seismic energy. Each casing ring obstruction or discontinuity position along the bore hole has an associated unique waveform source CODA that is measured for processing the body waves radiated into the earth formation surrounding the bore hole. A plurality of sensors (711), detects the radiated seismic signal after the signal transits the lithology formations. A time lapse profile is created and used for permanent monitoring of mineral resources and resource management.

L'invention concerne un système acoustique et un procédé utilisant l'énergie d'onde de conduit de forage, (103) convertie en énergie d'onde de corps (CODA), (106) au niveau d'obstructions de trous de forage mineures et d'anneaux de tubage, (105) comme sources ponctuelles d'énergie sismique. Chaque obstruction d'anneaux de tubage, ou chaque position de discontinuité, le long du trou de forage présente une source de forme d'onde CODA unique associée qui est mesurée pour traiter les ondes de corps rayonnées à l'intérieur de la formation de terrain entourant le trou de forage. Plusieurs capteurs (711) détectent le signal sismique rayonné une fois les formations lithologiques traversées par ledit signal. Un profil de durée temporelle est créé et utilisé au niveau de la surveillance en permanence de ressources minières et de la gestion des ressources.

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