Downhole process control method utilizing seismic communication

Details Downhole process control method utilizing seismic communication Downhole process control method utilizing seismic communication

G - Physics

01

V

G01V 1/22 (2006.01) G01V 1/42 (2006.01) G08C 23/02 (2006.01)

Patent

CA 2512567

A seismic communication system suitable to communicate information to an underground device (150) is disclosed. A seismic source (110) (preferably on or near the surface of the earth) generates a timed series of seismic shots. These shots are then detected by one or more seismic receivers (141) underground. Depending on the timing of these seismic shots, and the communication protocol selected, various information may be communicated to the underground target. Such a system is particularly desirable when the underground device includes a perforating gun because the perforating gun may not only be remotely detonated without the drawbacks of previous methods, but the detonation of the perforating gun charges may also be detected, giving an indication whether substantially fewer than all of the explosive charges detonated.

L'invention concerne un système de communications sismiques capable de communiquer des informations à un dispositif (150) souterrain. Une source sismique (110) (de préférence située sur la surface de la terre ou à proximité de celle-ci) produit une série minutée de secousses sismiques. Ces secousses sont ensuite détectées par un ou plusieurs récepteurs (141) sismiques, souterrains. Selon la durée de ces secousses thermiques, et le protocole de communication sélectionné, de nombreuses informations peuvent être communiquées à la cible souterraine. Ledit système convient particulièrement, lorsque le dispositif souterrain comprend un perforateur. ce dernier est non seulement détoné à distance sans présenter les inconvénients des procédés antérieurs, la détonation des charges du perforateur pouvant être détectée, mais il indique également si le nombre de charges ayant explosé est sensiblement inférieur au nombre total de charge explosives.

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