Adaptive filtering apparatus and method for seismic data acquisition
First Claim
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1. A method of filtering seismic signals in a seismic survey system, the method comprising:
- a) receiving an acoustic wave using a detector;
b) transmitting from the detector a first signal and a second signal, the first signal and the second signal being indicative of directional components of the received acoustic wave;
c) applying an adaptive filter algorithm to the first signal, the adaptive filter including a feedback signal indicative of a selected portion of the first signal combined with the second signal; and
d) determining the selected portion of the first signal at least in part by applying a set of predetermined window parameters to an output of the adaptive filter algorithm, wherein the predetermined window parameters include phase and timing parameters.
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Abstract
The present invention provides an adaptive filtering method for substantially eliminating ground roll noise encountered during seismic data acquisition. An apparatus for acquiring seismic data is provided that includes an adaptive filtering circuit coupled to a multi-axis sensor device.
54 Citations
22 Claims
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1. A method of filtering seismic signals in a seismic survey system, the method comprising:
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a) receiving an acoustic wave using a detector;
b) transmitting from the detector a first signal and a second signal, the first signal and the second signal being indicative of directional components of the received acoustic wave;
c) applying an adaptive filter algorithm to the first signal, the adaptive filter including a feedback signal indicative of a selected portion of the first signal combined with the second signal; and
d) determining the selected portion of the first signal at least in part by applying a set of predetermined window parameters to an output of the adaptive filter algorithm, wherein the predetermined window parameters include phase and timing parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of filtering seismic signals in a seismic survey system, the method comprising:
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a) receiving an acoustic wave using a detector;
b) transmitting from the detector a first signal and a second signal, the first signal and the second signal being indicative of directional components of the received acoustic wave;
c) applying an adaptive filter algorithm to the first signal, the adaptive filter including a feedback signal indicative of a selected portion of the first signal combined with the second signal; and
d) determining the selected portion of the first signal at least in part by applying a set of predetermined window parameters to an output of the adaptive filter algorithm, wherein determining window parameters includes selecting offset dependent application windows based at least in part on phase differences between vertical and horizontal components of the acoustic wave.
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12. An apparatus for providing filtered seismic signals, comprising:
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a) a detector coupled to the earth for receiving an acoustic wave, the detector providing an output comprising a first signal and a second signal, the first signal and the second signal being indicative of directional components of the received acoustic wave;
b) a processor coupled to the detector for receiving the first signal and the second signal, said processor processing commands for applying an adaptive filter algorithm to the first signal, the adaptive filter including a feedback signal indicative of a selected portion of the first signal combined with the second signal, wherein the selected portion of the first signal is determined at least in part by applying a set of predetermined window parameters to an output of the adaptive filter algorithm, wherein the predetermined window parameters include phase and timing parameters. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus for providing filtered seismic signals, comprising:
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a) a detector coupled to the earth for receiving an acoustic wave, the detector providing an output comprising a first signal and a second signal, the first signal and the second signal being indicative of directional components of the received acoustic wave;
b) a processor coupled to the detector for receiving the first signal and the second signal, said processor processing commands for applying an adaptive filter algorithm to the first signal, the adaptive filter including a feedback signal indicative of a selected portion of the first signal combined with the second signal, wherein the selected portion of the first signal is determined at least in part by applying a set of predetermined window parameters to an output of the adaptive filter algorithm, wherein the window parameters include offset dependent application windows based at least in part on phase differences between vertical and horizontal components of the acoustic wave.
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Specification