Method for reservoir navigation using formation pressure...

E - Fixed Constructions – 21 – B

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E21B 7/04 (2006.01) E21B 44/00 (2006.01) E21B 47/022 (2006.01) E21B 47/06 (2006.01)

Patent

CA 2473317

A formation pressure testing while drilling device on a bottomhole assembly (21) makes measurements of fluid pressure during drilling of a borehole (15). Based on the pressure measurements, drilling direction can be altered to maintain the wellbore (15) in a desired relation to a fluid contact. Acoustic transmitters and/or receivers (59,61) on the bottomhole assembly can provide additional information about bed boundaries, faults and gas-water contacts.

L'invention concerne un procédé permettant d'effectuer des mesures d'essai de pression dans une formation pendant qu'un dispositif de forage disposé sur un ensemble de fonds de puits prend des mesures de pression fluidique pendant un forage de puits. En fonction des mesures de pression, il est possible de modifier le sens du forage afin de maintenir le puits dans une relation désirée de contact fluidique. Des émetteurs et/ou des récepteurs acoustiques disposés sur l'ensemble de fonds de puits peuvent fournir des informations supplémentaires sur les limites du lit, les failles et les contacts gaz-eau.

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