Method of acquiring ghost-free signatures for broadband source calibration
AssigneePGS Geophysical AS
InventorsJens Fredrik Barra WISLØFF, Daniel BARKER
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Abstract
Embodiments described herein provide a method for acquiring de-ghosted data that can be utilized for calibration of a seismic source (air gun) model. Positions of a plurality of seismic receivers can be determined to enable efficient removal of an interference effect of ghost signals originating from mirrored versions of at least one seismic source that are received at the plurality of seismic receivers (hydrophones). Data (de-ghosted or near de-ghosted) can be acquired from the plurality of seismic receivers located at the determined positions by operating the at least one seismic source. A calibrated model of the at least one seismic source can be prepared based on the acquired (de-ghosted) data.
Claims25
A method, comprising:
- determining positions of a plurality of seismic receivers to enable removal of an interference effect of ghost signals originating from mirrored versions of at least one seismic source that are received at the plurality of seismic receivers;
- acquiring data from the plurality of seismic receivers located at the determined positions by operating the at least one seismic source;
- and
- preparing a calibrated model of the at least one seismic source based on the acquired data.
A non-transitory machine-readable medium storing instructions executable by a processing resource to cause a machine to:
- determine positions of a plurality of seismic receivers to enable removal of an interference effect of ghost signals originating from mirrored versions of at least one seismic source that are received at the plurality of seismic receivers;
- acquire data from the plurality of seismic receivers located at the determined positions by operating the at least one seismic source;
- and
- prepare a calibrated model of the at least one seismic source based on the acquired data.
A marine seismic source calibration assembly, comprising:
- a first sensor cable and a second sensor cable;
- at least one seismic source attached to the first sensor cable;
- and
- an array of seismic receivers attached to the second sensor cable, wherein
- positions of the seismic receivers in the array are determined to enable removal of an interference effect of ghost signals originating from mirrored versions of the at least one seismic source that are received at the array of seismic receivers.
Dependencies are inferred from the claim text.