Removing offset from seismic signals
AssigneeInova, Ltd.
InventorWilliam T. McDavid
Life of this patent
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Abstract
Methods, systems, and devices for conducting a seismic survey. The system includes at least one seismic sensor configured to supply a signal responsive to reflections of acoustic energy from an earth surface; and at least one processor configured to: mitigate sensor offset from a sequence of samples representative of the signal by filtering the sequence of samples using a symmetrical-in-time finite impulse response (FIR) filter. The FIR filter may approximate a sinc-in-frequency filter. The at least one processor may be configured to process the sequence of samples using a plurality of filter stages that are rectangular in time. The length of one filter stage of the plurality of filter stages may be different than the length of another filter stage of the plurality of filter stages.
Claims21
A system for conducting a seismic survey, comprising:
- at least one seismic sensor configured to supply a signal responsive to reflections of acoustic energy from an earth surface, the signal comprising a direct current (DC) offset;
- and
- at least one processor configured to:
- mitigate sensor offset from a sequence of samples representative of the signal by filtering the sequence of samples using a symmetrical-in-time finite impulse response (FIR) filter.
A method of conducting a seismic survey, comprising:
- receiving a signal from at least one seismic sensor, the signal indicative of reflections of acoustic energy from an earth surface and comprising a direct current (DC) offset;
- and
- mitigating sensor offset from a sequence of samples representative of the seismic signal by filtering the sequence of samples using a symmetrical-in-time finite impulse response (FIR) filter.
A method of mitigating sensor offset from a sequence of samples representative of a response of a seismic sensor to reflections of acoustic energy from an earth surface, comprising:
- filtering the sequence of samples using a symmetrical-in-time finite impulse response (FIR) filter.
Dependencies are inferred from the claim text.