Buoy-based marine electromagnetic signal acquisition system
First Claim
1. A sensor cable system for measuring electromagnetic response of the Earth'"'"'s subsurface, comprising:
- a sensor cable deployable on a bottom of a body of water, the sensor cable having a plurality of electromagnetic sensing elements thereon at spaced apart locations; and
a system control unit in signal communication with the sensing elements, the system control unit including a transceiver for communicating signals to and from a corresponding sensor cable system, the system control unit including a global positioning system signal receiver, the system control unit including a processor configurable to receive signals detected by sensing elements in the corresponding sensor cable system, the processor configurable to compute at least one of pre-processed and stacked signals from the sensing elements in the sensor cable and from the sensing elements in the corresponding cable system, the processor configurable to calculate a statistical measure of the stacked signals, wherein the system control unit is disposed in a flotation device.
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Accused Products
Abstract
A sensor cable system for measuring electromagnetic response of the Earth'"'"'s subsurface includes a sensor cable deployable on the bottom of a body of water. The sensor cable has a plurality of electromagnetic sensing devices thereon at spaced apart locations. A system control unit is in signal communication with the sensing elements. The system control unit includes a transceiver for communicating signals to and from a corresponding sensor cable system. The system control unit includes a global positioning system signal receiver. The system control unit includes a processor configurable to receive signals detected by sensing elements in the corresponding sensor cable system. The processor is configurable to compute stacked signals from the sensing elements in the sensor cable and from sensing elements in the corresponding system. The processor is configurable to calculate a statistical measure of the stacked signals. The system control unit is disposed in a flotation device.
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Citations
21 Claims
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1. A sensor cable system for measuring electromagnetic response of the Earth'"'"'s subsurface, comprising:
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a sensor cable deployable on a bottom of a body of water, the sensor cable having a plurality of electromagnetic sensing elements thereon at spaced apart locations; and a system control unit in signal communication with the sensing elements, the system control unit including a transceiver for communicating signals to and from a corresponding sensor cable system, the system control unit including a global positioning system signal receiver, the system control unit including a processor configurable to receive signals detected by sensing elements in the corresponding sensor cable system, the processor configurable to compute at least one of pre-processed and stacked signals from the sensing elements in the sensor cable and from the sensing elements in the corresponding cable system, the processor configurable to calculate a statistical measure of the stacked signals, wherein the system control unit is disposed in a flotation device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for acquiring a marine electromagnetic survey, comprising:
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actuating an electromagnetic source deployed in a body of water at selected times; detecting signals related to at least one of an electric field and a magnetic field at spaced apart locations along a first cable disposed proximate the bottom of the body of water; detecting signals related to at least one of an electric field and a magnetic field at spaced apart locations along at least a second cable disposed proximate the bottom of the body of water; conducting at least one of the detected signals and digital representations thereof from at least one of the first cable and the at least a second cable to a respective signal processing device for each of the first and at least a second cables disposed proximate the water surface; communicating the detected signals from at least one of the signal processing devices to another one of the signal processing devices; and processing the communicated signals and the conducted signals in the other one of the signal processing devices, the processing comprising generating stacked signals and calculating in the other one of the signal processing devices at least one statistical measure of the stacked signals. - View Dependent Claims (19, 20, 21)
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Specification