A seismic communication system suitable to communicate information to an underground
device is disclosed. A seismic source (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 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.
The seismic communication system may also be used, as a component within a multi-functional
well seismic system, for seismic reservoir monitoring or seismic monitoring of
well operations.
