Patent ID: 7325647
Filing Date: 2008-02-05
Classification: G01V

Abstract:
1. A seismic exploration or monitoring system intended for periodic seismic monitoring of an underground formation, comprising seismic signal emission means anchorable in the formation by fastening anchor means tightly coupled with the formation at a certain depth and reception means for signals coming from the formation in response to the seismic signals emitted, characterized in that the anchor means comprise a plurality of coupling devices, each one being preinstalled at a location of a series of locations selected above the underground formation and the emission means comprise at least one mobile seismic source movable successively between these various locations and provided with locking means for securing the seismic source successively to the various coupling devices, wherein each coupling device comprises at least a first and a second anchor element buried in the ground at different depths each one being connected by transmission elements to the seismic source arranged at the surface or in the vicinity thereof, a first of the transmission elements being associated with the anchor element which is the closest to the surface, and a second of the transmission elements being associated at a first end with the anchor element having the greatest depth of burial, the first of the transmission elements surrounding the second of the transmission elements, and the seismic source being tightly connected, during operation, to the transmission elements.