Removing Electromagnetic Crosstalk Noise from Seismic Data
AssigneePGS Geophysical AS
InventorsGeir Andre Motzfeldt Drange, Ian David Sorby
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Abstract
One or more first sensors may be configured to sense seismic signals and one or more second sensors may be configured to sense electromagnetic crosstalk signals. The second sensors are not responsive to the seismic signals. The data from the first and second sensors may be recorded as first data and second data, respectively. The first data may be modified based on the second data to remove the electromagnetic crosstalk noise form the seismic data.
Claims29
A method, comprising:
- detecting, using one or more first sensors, seismic signals;
- and
- detecting, using one or more second sensors, an electromagnetic crosstalk signal, wherein the one or more second sensors are not responsive to the seismic signals;
- and
- storing, by a computer system, first data representing the seismic signals and second data representing the electromagnetic crosstalk signal.
A sensor comprising:
- one or more antennas configured to detect electromagnetic signals;
- and
- a digitizing circuit coupled to the one or more antennas and configured to digitize the electromagnetic signals at a sample rate that matches a sample rate of one or more seismic sensors configured to detect seismic signals in a marine seismic survey, wherein the one or more seismic sensors are susceptible to interference by the electromagnetic signals.
A non-transitory computer accessible storage medium storing a plurality of instruction which are computer-executable to perform operations, the operations comprising:
- accessing first data from recorded seismic survey data, wherein the first data represents seismic signals captured by a plurality of seismic sensors;
- accessing second data from the recorded seismic survey data, wherein the second data represents an electromagnetic crosstalk noise signal captured by at least one second sensor that is insensitive to the seismic signals;
- and
- modifying the first data based on the second data to reduce an amount of electromagnetic crosstalk noise present in the modified first data.
Dependencies are inferred from the claim text.