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AssigneesInstitut Francais du Petrole, Gaz de France Compagnie Generale de Geophysique
InventorJulien Meunier
Estimating the term…
Seismic wave reception device comprising a hydrophone and/or a geophone and method for coupling it (or them) with a solid medium such as the subsoil. The device comprises at least one hydrophone (2) immersed in a closed flexible-walled sheath (7) filled with liquid (8) that is closed at one end by a sealed plug (9) provided with a sealed duct for a cable (10) connecting the hydrophone to a signal acquisition means (E). The sheath is arranged in a cavity (6) and tightly coupled with medium (5) substantially over the total surface thereof, preferably by means of a hardenable material such as cement. A geophone can be placed in the same coupling material in the vicinity of sheath (7) containing hydrophone (2). Application: seismic prospecting or monitoring operations in an underground formation, notably in order to discriminate the seismic upgoing and downgoing waves.
A reception device intended for sensing seismic waves coming from a solid medium, comprising at least one hydrophone in a cavity of the medium and coupled therewith, a closed flexible-walled sheath which tightly couples with the medium substantially over the total surface thereof, the sheath being filled with a liquid in which hydrophone is immersed, and closed at one end by a sealed plug provided with a sealed duct for a cable connecting the hydrophone to a signal acquisition device;
A method for coupling a seismic wave reception device comprising at least one hydrophone with a solid medium in a cavity to be buried in the medium comprising:
A reception device intended for sensing seismic waves coming from a subsurface formation, comprising at least one hydrophone in a cavity provided in the subsurface formation, a closed flexible-walled sheath, the sheath being filled with a liquid in which the hydrophone is immersed, a rigid material filling the cavity around the sheath for coupling the flexible-walled sheath to the subsurface formation, and the device is closed at one end by a sealed plug provided with a sealed duct for a cable connecting the hydrophone to a signal acquisition device.
A reception device intended for sensing seismic waves coming from a subsurface formation, comprising at least one hydrophone in one of a hole or well provided in the subsurface formation, a closed flexible-walled sheath, the sheath being filled with a liquid in which the hydrophone is immersed, a rigid material filling the one of a hole or well around the sheath for coupling the sheath to the subsurface formation, and the device is closed at one end by a sealed plug provided with a sealed duct for a cable connecting the hydrophone to a signal acquisition device.
A reception device intended for sensing seismic waves coming from a subsurface formation comprising a closed flexible-walled sheath filled with a liquid and closed at one end by a sealed plug, at least one hydrophone immersed in the liquid and connected by a cable with a signal acquisition device through a sealed duct in a plug and suspended in the liquid by the cable and wherein in use the flexible-walled sheath is buried in a hole or well in the subsurface formation and coupled therewith substantially over the total surface thereof.
A reception device intended for sensing seismic waves coming from a subsurface formation comprising a closed flexible-walled sheath filled with a liquid and closed at one end by a sealed plug, at least one hydrophone immersed in the liquid and connected by a cable with a signal acquisition device through a sealed duct in a plug and suspended in the liquid by the cable, and wherein in use the flexible-walled sheath is buried in a cavity in the subsurface formation and coupled therewith substantially over the total surface thereof through a rigid material filling the cavity around the flexible-walled sheath.
An installation for seismic monitoring a hydrocarbon production reservoir, comprising at least one hydrophone in a borehole provided adjacent the reservoir, a flexible-walled sheath closed at one end by a sealed plug provided with a sealed duct for a cable connecting the hydrophone to a signal acquisition device, the sheath being filled with a liquid in which the hydrophone is immersed and a rigid material filling the borehole around the sheath for coupling the sheath to the subsurface.
An installation for monitoring a hydrocarbon production reservoir, comprising a flexible-walled sheath filled with a liquid and closed at one end by a sealed plug, at least one hydrophone immersed in the liquid and connected by a cable with a signal acquisition device through a sealed duct in the plug and suspended in the liquid by the cable and the flexible-walled sheath is buried in a hole or well in the subsurface formation and coupled therewith substantially over the total outside surface thereof through a rigid material filling the cavity around the flexible-walled sheath.
Dependencies are inferred from the claim text.