Methods and systems for acquiring and processing seismic data
First Claim
1. A method for acquiring seismic data, the method comprising:
- transmitting an ambient electromagnetic signal having a known time dependence for propagation within a survey area;
receiving the ambient electromagnetic signal at a plurality of distinct geographic locations with independently operating data acquisition units positioned at the plurality of distinct locations;
collecting data representing acoustic signals received from the Earth at the plurality of distinct geographic locations with the data acquisition units; and
synchronizing the collected acoustic signals for the plurality of distinct geographic locations by correlating the known time dependence of the propagated electromagnetic signal with time dependences of the collected acoustic signals.
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Abstract
Methods and systems are provided for acquiring seismic data. An ambient electromagnetic signal having a known time dependence is transmitted for propagation within a survey area. The ambient electromagnetic signal is received at distinct geographic locations with independently operating data acquisition units positioned at the distinct locations. Data representing acoustic signals received from the Earth at the distinct geographic locations are collected with the data acquisition units. The collected acoustic signals for the distinct geographic locations are synchronized by correlating the known time dependence of the propagated electromagnetic signal with time dependencies of the collected acoustic signals.
58 Citations
22 Claims
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1. A method for acquiring seismic data, the method comprising:
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transmitting an ambient electromagnetic signal having a known time dependence for propagation within a survey area;
receiving the ambient electromagnetic signal at a plurality of distinct geographic locations with independently operating data acquisition units positioned at the plurality of distinct locations;
collecting data representing acoustic signals received from the Earth at the plurality of distinct geographic locations with the data acquisition units; and
synchronizing the collected acoustic signals for the plurality of distinct geographic locations by correlating the known time dependence of the propagated electromagnetic signal with time dependences of the collected acoustic signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for acquiring seismic data, the system comprising:
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a transmitter system adapted to transmit an ambient electromagnetic signal having a known time dependence for propagation within a survey area;
a plurality of independently operating data acquisition units distributed at a plurality of distinct geographical locations within the survey area, each such data acquisition unit being adapted to collect data representing acoustic signals received from the Earth and to receive the ambient electromagnetic signal; and
a processor coupled with a computer-readable storage medium having a computer-readable program embodied therein for directing operation of the processor, the computer-readable program including instructions for synchronizing the collected acoustic signals for the plurality of distinct geographical locations by correlating the known time dependence of the propagated electromagnetic signal with time dependences of the collected acoustic signals. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification