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US 10,310,121 B2Granted
Seismic sensor devices, systems, and methods including noise filtering
AssigneeION Geophysical Corporation
InventorRobert E. Rouquette
Life of this patent
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Abstract
Methods are disclosed for sensing acoustic waves in a medium. One example includes a first elongated member, a first motion sensor sensitive to vibrations of the first elongated member, a second motion sensor spaced apart from the first motion sensor and also sensitive to vibrations of the first elongated member, and a first vibration source operably coupled to the first elongated member and configured to vibrate the first elongated member.
Claims20
A method of sensing acoustic waves in a medium, the method comprising:
- receiving readings from a first motion sensor and a second motion sensor coupled to a streamer, wherein the streamer comprises an elongated cable member disposed in the medium and the acoustic waves reflect from structures underlying the medium;
- receiving readings comprising unfiltered acoustic wave signals from a third motion sensor coupled to the streamer between the first motion sensor and the second motion sensor;
- and
- filtering noise from the readings received from the third motion sensor to generate a set of filtered data, wherein said filtering noise includes determining first and second transfer functions corresponding to the streamer;
- and
- modifying the readings received from the first motion sensor using the first transfer function to generate a first set of modified readings;
- modifying the readings received from the second motion sensor using the second transfer function to generate a second set of modified readings;
- and
- modifying the readings received from the third motion sensor using the first and second sets of modified readings to generate the set of filtered data;
- wherein the unfiltered acoustic wave signals are processed to reduce non-acoustic noise and modified to produce the filtered acoustic wave signal, which represents the acoustic waves propagating through the medium;
- and
- producing readings of the acoustic waves related to the underlying structures, and identifying or mapping the structures thereby.
9 more elements
A method of sensing acoustic waves propagating in a medium, the method comprising:
- receiving readings comprising unfiltered acoustic signals from a first motion sensor and a second motion sensor coupled to a streamer disposed in the medium;
- receiving readings comprising unfiltered acoustic signals from a third motion sensor coupled to the streamer between the first motion sensor and the second motion sensor, wherein the unfiltered acoustic wave signals include non-acoustic noise;
- filtering noise from the readings received from the third motion sensor to generate a set of filtered data, wherein said filtering noise includes
- determining first and second transfer functions corresponding to the streamer,
- modifying the readings received from the first motion sensor using the first transfer function to generate a first set of modified readings,
- modifying the readings received from the second motion sensor using the second transfer function to generate a second set of modified readings, and
- modifying the readings received from the third motion sensor using the first and second sets of modified readings to generate the set of filtered data;
- and
- calculating a filtered acoustic wave signal based at least in part on the transfer functions, wherein the unfiltered acoustic wave signals are processed to reduce the non-acoustic noise and modified to produce the filtered acoustic wave signal, the filtered acoustic wave signal representing the acoustic waves propagating through the medium;
- producing readings of the acoustic waves related to the underlying structures and identifying or mapping the structures thereby.
7 more elements
Dependencies are inferred from the claim text.