IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0310818
(2002-12-06)
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우선권정보 |
FR-01 16005(2001-12-10) |
발명자
/ 주소 |
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출원인 / 주소 |
- Institut Francais du Petrole
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대리인 / 주소 |
Antonelli, Terry, Stout &
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인용정보 |
피인용 횟수 :
46 인용 특허 :
11 |
초록
▼
The invention is a system designed for acquisition of seismic data by means of acquisition stations set on water bottom of a water body. The system comprises acquisition stations (DSAU) combining a streamlined boom suited to penetrate the bottom and thus couple seismic receivers with the underlying
The invention is a system designed for acquisition of seismic data by means of acquisition stations set on water bottom of a water body. The system comprises acquisition stations (DSAU) combining a streamlined boom suited to penetrate the bottom and thus couple seismic receivers with the underlying formation, a sealed body for electronic data acquisition and communication modules. These acquisition stations (DSAU) are placed in the water and drop to the bottom under the effect of gravity. Relay buoys (RCB) are positioned at the surface, each with a GPS positioning module, a radio link with a central station (CCRU), on a ship for example, and modules providing acoustic communication with bottom acquisition stations (DSAU), which are used to determine the position of the stations in relation to the relay buoys and to exchange control data and seismic data (good running order data or possibly seismic traces acquired if the conditions lend themselves thereto) to provide seismic prospecting or monitoring of an underground formation.
대표청구항
▼
What is claimed is: 1. A system for acquiring of seismic data relative to an underwater underground formation, comprising: a central control and acquisition station; relay buoys which float on water, the buoys each including a control module, a positioning signal receiver providing satellite posit
What is claimed is: 1. A system for acquiring of seismic data relative to an underwater underground formation, comprising: a central control and acquisition station; relay buoys which float on water, the buoys each including a control module, a positioning signal receiver providing satellite positioning of the buoy, and a radio transmitter for exchanging data with the central control and acquisition station; bottom seismic signal acquisition stations, the bottom seismic signal acquisition stations each including a sealed body including a pressure detector and associated with a part or boom provided with a housing for seismic receivers, the bottom seismic signal acquisition stations descending under an effect of gravity to a water body bottom and penetrate the bottom so as to couple the seismic receivers with the underground formation to obtain the seismic data relative to the underwater underground formation, a control unit and a device for acquiring seismic data received by the seismic receivers in the part or boom and by the pressure detector; and wherein the relay buoys and bottom seismic acquisition stations are each provided with an acoustic transmission device including an acoustic transponder, an acoustic positioning module and an acoustic communication module for exchanging, by modem via the acoustic transponder, either positioning data, control data from the central control and acquisition station or seismic data acquired by the seismic receivers to be transmitted to the central control and acquisition station. 2. A system as claimed in claim 1, wherein the bottom seismic signal acquisition stations are divided into groups, each relay buoy providing exchange of positioning data, control data, or seismic data with one group of the groups of seismic acquisition stations that is closer thereto than other relay buoys. 3. A system as claimed in claim 1, wherein each acquisition station comprises storage means for seismic record traces corresponding to seismic signals picked up by the seismic receivers of each seismic acquisition station and means in the control unit for controlling deferred transfer to one of the relay buoys, via the acoustic communication module at least part of stored seismic traces, at a transmission frequency. 4. A system as claimed in claim 2, wherein each acquisition station comprises storage means for seismic record traces corresponding to seismic signals picked up by the seismic receivers of each seismic acquisition station and means in the control unit for controlling deferred transfer to one of the relay buoys, via the acoustic communication module at least part of stored seismic traces, at a transmission frequency. 5. A system as claimed in claim 1, wherein each seismic signal acquisition station comprises storage means for seismic record traces corresponding to seismic signals picked up by the seismic receivers of each seismic signal acquisition station and means, in the control unit, for forming data indicative of a working order of the seismic signal acquisition station and for controlling transfer, according to a transmission frequency, the formed data to one of the relay buoys via the acoustic communication module. 6. A system as claimed in claim 2, wherein each seismic acquisition station comprises storage means for seismic record traces corresponding to seismic signals picked up by the seismic receivers of each seismic acquisition station and means, in the control unit , for forming data indicative of a working order of the seismic acquisition station and for controlling transfer, according to a transmission frequency, the formed data to one of the relay buoys via an acoustic communication module. 7. A system as claimed in claim 1, wherein each seismic signal acquisition station comprises means for optical transmission of the recorded seismic data to one of the relay buoys or to a vehicle. 8. A system as claimed in claim 2, wherein each seismic signal acquisition station comprises means for optical transmission of the recorded seismic data to one of the relay buoys or to a vehicle. 9. A system as claimed in claim 3, wherein each seismic signal acquisition station comprises means for optical transmission of the recorded seismic data to one of the relay buoys or to a vehicle. 10. A system as claimed in claim 4, wherein each seismic signal acquisition station comprises means for optical transmission of the recorded seismic data to one of the relay buoys or to a vehicle. 11. A system as claimed in claim 5, wherein each seismic signal acquisition station comprises means for optical transmission of the recorded seismic data to one of the relay buoys or to a vehicle. 12. A system as claimed in claim 6, wherein each seismic signal acquisition station comprises means for optical transmission of the recorded seismic data to one of the relay buoys or to a vehicle. 13. A system as claimed in claim 1, wherein each relay buoy comprises means cooperating with the control unit for acquiring and dating acoustic signals relative to a position of the seismic acquisition stations and for transmitting the acquired and dated acoustic signals to the central control and acquisition station at a same time as coordinates thereof received by the receiver of the satellite positioning system. 14. A system as claimed in claim 2, wherein each relay buoy comprises means cooperating with the control unit for acquiring and dating acoustic signals relative to a position of the seismic acquisition stations and for transmitting the acquired and dated acoustic signals to the central control and acquisition station at a same time as coordinates thereof received by the receiver of the satellite positioning system. 15. A system as claimed in claim 3, wherein each relay buoy comprises means cooperating with the control unit for acquiring and dating acoustic signals relative to a position of the seismic acquisition stations and for transmitting the acquired and dated acoustic signals to the central control and acquisition station at a same time as coordinates thereof received by the receiver of the satellite positioning system. 16. A system as claimed in claim 4, wherein each relay buoy comprises means cooperating with the control unit for acquiring and dating acoustic signals relative to a position of the seismic acquisition stations and for transmitting the acquired and dated acoustic signals to the central control and acquisition station at a same time as coordinates thereof received by the receiver of the satellite positioning system. 17. A system as claimed in claim 5, wherein each relay buoy comprises means cooperating with the control unit for acquiring and dating acoustic signals relative to a position of the seismic acquisition stations and for transmitting the acquired and dated acoustic signals to the central control and acquisition station at a same time as coordinates thereof received by the receiver of the satellite positioning system. 18. A system as claimed in claim 6, wherein each relay buoy comprises means cooperating with the control unit for acquiring and dating acoustic signals relative to a position of the seismic acquisition stations and for transmitting the acquired and dated acoustic signals to the central control and acquisition station at a same time as coordinates thereof received by the receiver of the satellite positioning system. 19. A system as claimed in claim 1, wherein each relay buoy comprises means for recording acquired seismic data coming from the bottom seismic signal acquisition stations and for transmitting the date to the central control and recording station. 20. A system as claimed in claim 2, wherein each relay buoy comprises means for recording acquired seismic data coming from the bottom seismic signal acquisition stations and for transmitting the date to the central control and recording station. 21. A system as claimed in claim 3, wherein each relay buoy comprises means for recording acquired seismic data coming from the bottom seismic signal acquisition stations and for transmitting the date to the central control and recording station. 22. A system as claimed in claim 4, wherein each relay buoy comprises means for recording acquired seismic data coming from the bottom seismic signal acquisition stations and for transmitting the date to the central control and recording station. 23. A system as claimed in claim 5, wherein each relay buoy comprises means for recording acquired seismic data coming from the bottom seismic signal acquisition stations and for transmitting the date to the central control and recording station. 24. A system as claimed in claim 6, wherein each relay buoy comprises means for recording acquired seismic data coming from the bottom seismic signal acquisition stations and for transmitting the date to the central control and recording station. 25. A system as claimed in claim 1, wherein each relay buoy comprises means for managing transmission of a signal for triggering a seismic source to synchronize acquisition of the seismic data by the bottom seismic signal acquisition stations. 26. A system as claimed in claim 2, wherein each relay buoy comprises means for managing transmission of a signal for triggering a seismic source to synchronize acquisition of the seismic data by the bottom seismic signal acquisition stations. 27. A system as claimed in claim 3, wherein each relay buoy comprises means for managing transmission of a signal for triggering a seismic source to synchronize acquisition of the seismic data by the bottom seismic signal acquisition stations. 28. A system as claimed in claim 4, wherein each relay buoy comprises means for managing transmission of a signal for triggering a seismic source to synchronize acquisition of the seismic data by the bottom seismic signal acquisition stations. 29. A system as claimed in claim 5, wherein each relay buoy comprises means for managing transmission of a signal for triggering a seismic source to synchronize acquisition of the seismic data by the bottom seismic signal acquisition stations. 30. A system as claimed in claim 6, wherein each relay buoy comprises means for managing transmission of a signal for triggering a seismic source to synchronize acquisition of the seismic data by the bottom seismic signal acquisition stations. 31. A system as claimed in claim 3, wherein each bottom seismic signal acquisition station comprises means associated with the sealed body for providing buoyancy and means for disconnecting the body from the part or boom at a command of central station. 32. A system as claimed in claim 2, wherein each bottom seismic acquisition station comprises means associated with sealed body for providing buoying and means for disconnecting the body from the boom at a command of central station. 33. A system as claimed in claim 3, wherein each bottom seismic acquisition station comprises means associated with sealed body for providing buoying and means for disconnecting the body from the boom at a command of central station. 34. A system as claimed in claim 4, wherein each bottom seismic acquisition station comprises means associated with sealed body for providing buoying and means for disconnecting the body from the boom at a command of central station. 35. A system as claimed in claim 5, wherein each bottom seismic acquisition station comprises means associated with sealed body for providing buoying and means for disconnecting the body from the boom at a command of central station. 36. A system as claimed in claim 6, wherein each bottom seismic acquisition station comprises means associated with sealed body for providing buoying and means for disconnecting the body from the boom at a command of central station. 37. A system as claimed in claim 1, wherein each bottom seismic signal acquisition station comprises means for coupling to an transmission network, for providing direct transfer of stored seismic data to the central station. 38. A system as claimed in claim 2, wherein each bottom seismic signal acquisition station comprises means for coupling to an transmission network, for providing direct transfer of stored seismic data to the central station. 39. A system as claimed in claim 3, wherein each bottom seismic signal acquisition station comprises means for coupling to an transmission network, for providing direct transfer of stored seismic data to the central station. 40. A system as claimed in claim 4, wherein each bottom seismic signal acquisition station comprises means for coupling to an transmission network, for providing direct transfer of stored seismic data to the central station. 41. A system as claimed in claim 5, wherein each bottom seismic signal acquisition station comprises means for coupling to an transmission network, for providing direct transfer of stored seismic data to the central station. 42. A system as claimed in claim 6, wherein each bottom seismic signal acquisition station comprises means for coupling to an transmission network, for providing direct transfer of stored seismic data to the central station. 43. A system as claimed in claim 1, wherein the central station comprises a control including a central unit associated with a storage means, and an interface for managing exchanges between the central unit and a graphics interface that manages exchanges with a visual display and printing means, a mass storage means, and means for communication with seismic signal acquisition stations and the relay buoys, means for providing communication with the relay buoys by a radio link and reception of positioning signals by satellite, and a means for control and triggering of a seismic source. 44. A system as claimed in claim 2, wherein the central station comprises a control including a central unit associated with a storage means, and an interface for managing exchanges between the central unit and a graphics interface that manages exchanges with a visual display and printing means, a mass storage means, and means for communication with seismic signal acquisition stations and the relay buoys, means for providing communication with the relay buoys by a radio link and reception of positioning signals by satellite, and a means for control and triggering of a seismic source. 45. A system as claimed in claim 3, wherein the central station comprises a control including a central unit associated with a storage means, and an interface for managing exchanges between the central unit and a graphics interface that manages exchanges with a visual display and printing means, a mass storage means, and means for communication with seismic signal acquisition stations and the relay buoys, means for providing communication with the relay buoys by a radio link and reception of positioning signals by satellite, and a means for control and triggering of a seismic source. 46. A system as claimed in claim 4, wherein the central station comprises a control including a central unit associated with a storage means, and an interface for managing exchanges between the central unit and a graphics interface that manages exchanges with a visual display and printing means, a mass storage means, and means for communication with seismic signal acquisition stations and the relay buoys, means for providing communication with the relay buoys by a radio link and reception of positioning signals by satellite, and a means for control and triggering of a seismic source. 47. A system as claimed in claim 5, wherein the central station comprises a control including a central unit associated with a storage means, and an interface for managing exchanges between the central unit and a graphics interface that manages exchanges with a visual display and printing means, a mass storage means, and means for communication with seismic signal acquisition stations and the relay buoys, means for providing communication with the relay buoys by a radio link and reception of positioning signals by satellite, and a means for control and triggering of a seismic source. 48. A system as claimed in claim 6, wherein the central station comprises a control including a central unit associated with a storage means, and an interface for managing exchanges between the central unit and a graphics interface that manages exchanges with a visual display and printing means, a mass storage means, and means for communication with seismic signal acquisition stations and the relay buoys, means for providing communication with the relay buoys by a radio link and reception of positioning signals by satellite, and a means for control and triggering of a seismic source. 49. A system as claimed in claim 1, comprising a portable control and testing station for providing deployment and recovery of the seismic acquisition stations and data stored therein, including means for locating the seismic signal acquisition stations after return to the surface by a radio link, means for downloading data stored in the seismic signal acquisition stations and for recording the data, means for remote recovery of the seismic data stored in the relay buoys, and means for transferring the seismic data to the central control and recording station by means of a communication network. 50. A system as claimed in claim 2, comprising a portable control and testing station for providing deployment and recovery of the both seismic acquisition stations and of data stored therein, including means for locating the seismic acquisition stations after return to the surface by a radio link, means for downloading data stored in the seismic acquisition stations and for recording the data, means for remote recovery of the seismic data stored in the relay buoys, and means for transferring the seismic data to the central control and recording station by means of a communication network. 51. A system as claimed in claim 3, comprising a portable control and testing station for providing deployment and recovery of the both seismic acquisition stations and of data stored therein, including means for locating the seismic acquisition stations after return to the surface by a radio link, means for downloading data stored in the seismic acquisition stations and for recording the data, means for remote recovery of the seismic data stored in the relay buoys, and means for transferring the seismic data to the central control and recording station by means of a communication network. 52. A system as claimed in claim 4, comprising a portable control and testing station for providing deployment and recovery of the both seismic acquisition stations and of data stored therein, including means for locating the seismic acquisition stations after return to the surface by a radio link, means for downloading data stored in the seismic acquisition stations and for recording the data, means for remote recovery of the seismic data stored in the relay buoys, and means for transferring the seismic data to the central control and recording station by means of a communication network. 53. A system as claimed in claim 5, comprising a portable control and testing station for providing deployment and recovery of the both seismic acquisition stations and of data stored therein, including means for locating the seismic acquisition stations after return to the surface by a radio link, means for downloading data stored in the seismic acquisition stations and for recording the data, means for remote recovery of the seismic data stored in the relay buoys, and means for transferring the seismic data to the central control and recording station by means of a communication network. 54. A system as claimed in claim 6, comprising a portable control and testing station for providing deployment and recovery of the both seismic acquisition stations and of data stored therein, including means for locating the seismic acquisition stations after return to the surface by a radio link, means for downloading data stored in the seismic acquisition stations and for recording the data, means for remote recovery of the seismic data stored in the relay buoys, and means for transferring the seismic data to the central control and recording station by means of a communication network. 55. A method of seismic exploration or monitoring of an underwater underground formation by acquiring seismic data relative to the underwater underground formation, comprising: installing, at a bottom of a water body, bottom seismic signal acquisition units comprising a part or boom provided with a housing for at least one seismic receiver and an acquisition module for seismic data received by each receiver, each acquisition unit falling under an effect of gravity, to the bottom of the water body and penetrating the bottom to couple the seismic receivers with the underground formation; determining a position of each acquisition unit installed at the bottom; emitting seismic waves from an underwater seismic source, receiving waves reflected by discontinuities of the underground formation in response to the seismic waves emitted in the formation and collecting the data received by the receivers of each acquisition unit; recovering, by a central station, seismic data acquired by each seismic signal acquisition unit; and exchanging between relay buoys and the bottom seismic signal acquisition stations, positioning data, control data from a central station or seismic data acquired by the bottom seismic signal acquisition devices, for transmission to the central station by transmission means in each bottom seismic signal acquisition device and each relay buoy comprising an acoustic transponder, an acoustic positioning module and an acoustic communication module using a modem. 56. A method as claimed in claim 55, comprising positioning and initially time synchronizing each bottom seismic signal acquisition station when placed into the water, by reference to a satellite positioning system, and monitoring descent thereof down to the bottom by a combination of time synchronization data and of time measurements obtained by acoustic telemetry between the bottom seismic signal acquisition station and the relay buoys, until stabilization of the station in contact with the bottom. 57. A method as claimed in claim 55, comprising acoustically transmitting recorded seismic traces picked up by the at least one seismic receiver of each bottom seismic signal acquisition station to a corresponding relay buoy by the transmission means. 58. A method as claimed in claim 56, comprising acoustically transmitting recorded seismic traces picked up by the at least one seismic receiver of each bottom seismic signal acquisition station to a corresponding relay buoy by the transmission means. 59. A method as claimed in claim 57, comprising acoustically transmitting from each acquisition station to a corresponding relay buoy, quality data indicative of a working order of each seismic signal acquisition station.
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