Seismic acquisition system with decentralized processing means
First Claim
1. A seismic acquisition system with decentralized processing capacity for reducing a volume of data to be transmitted with a communication link to at least one control unit and centralized therein comprising:
- at least one acquisition device for collecting the data in response to seismic signals received by an array of seismic receivers positioned on a field and transmitted to the at least one acquisition device, the at least one acquisition device including at least one acquisition chain for digitizing signals received by at least one of the seismic receivers and a control set for controlling acquisition and storage of signals, the control set including a processor and a digital signal processor controlled by the processor, the digital signal processor being programmed for performing processing operations on the seismic signals before transmission thereof to the control unit and for performing quality control on each seismic receiver and each acquisition chain and functioning according to two methods of operation, one method of operation being an active mode for performing the data processing operations and the quality control and the other operation being a standby mode having a lower power consumption than power consumption during the active mode.
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Accused Products
Abstract
The system includes a plurality of acquisition devices (Ai) for collecting signals received by receivers (Rk) and a central control, recording and processing station. This station manages the performance of the devices (Ai), of successive signal acquisition cycles and thereafter the centralization thereof. In order to relieve the central station of part of the tasks thereof in case of a high volume of data to be collected and processed, acquisition devices are used which have management processors (2, M1, M2) and with complementary computing processors (7, M3) programmed for carrying out processings of the data before the transmission thereof. Various combinations of seismic signals, data compression, and quality controls are performed in real time during the phase of setting of the seismic equipment (seismic receivers and acquisition device electronics (CA1 to CAn) in the devices Ai in the field), etc, immediately accessible to operators in the field.
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Citations
20 Claims
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1. A seismic acquisition system with decentralized processing capacity for reducing a volume of data to be transmitted with a communication link to at least one control unit and centralized therein comprising:
at least one acquisition device for collecting the data in response to seismic signals received by an array of seismic receivers positioned on a field and transmitted to the at least one acquisition device, the at least one acquisition device including at least one acquisition chain for digitizing signals received by at least one of the seismic receivers and a control set for controlling acquisition and storage of signals, the control set including a processor and a digital signal processor controlled by the processor, the digital signal processor being programmed for performing processing operations on the seismic signals before transmission thereof to the control unit and for performing quality control on each seismic receiver and each acquisition chain and functioning according to two methods of operation, one method of operation being an active mode for performing the data processing operations and the quality control and the other operation being a standby mode having a lower power consumption than power consumption during the active mode. - View Dependent Claims (2, 3)
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4. A seismic acquisition system with decentralized processing capacity for reducing a volume of data to be transmitted with a communication link to at least one control unit and centralized therein comprising:
at least one acquisition device for collecting the data in response to seismic signals received by an array of seismic receivers positioned on a field and transmitted to the at least one acquisition device, the at least one acquisition device including at least one acquisition chain for digitizing signals received by at least one of the seismic receivers and a control set for controlling acquisition and storage of signals, the control set including a processor and a digital signal processor controlled by the processor, the digital signal processor being programmed for performing processing operations on the seismic signals before transmission thereof to the control unit and for performing quality control on each seismic receiver and each acquisition chain and functioning to determine electric and electromechanical characteristics of each seismic receiver by using an electrical circuit model of each seismic receiver. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A seismic acquisition method for reducing a volume of data to be transmitted between at least one acquisition device in response to signals received by an array of seismic receivers coupled to a zone to be explored and at least one control unit including performing in each acquisition device tests on each seismic receiver to determine electrical and electromechanical properties thereof comprising:
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applying to each receiver calibrated signals and recording an actual response curve thereof in response to the calibrated signals; making a model of the seismic receivers with an equivalent electrical circuit and forming a reference response curve of the equivalent electrical circuit; determining a response curve of the model of the seismic receivers and deviations thereof from the reference response curve; and optimizing the model of the seismic receivers by reducing the deviations according to an iterative operative sequence by modifying the equivalent electrical circuit and comparing the reference response curve obtained after modification with the actual response curve to determine the electrical circuit model which is a best electrical circuit model of the seismic receivers for use in determining the electrical and electromechanical properties thereof during the testing. - View Dependent Claims (18, 19, 20)
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Specification