Separating survey data for a plurality of survey sources
AssigneeWesternGeco L.L.C.
InventorEverhard Johan Muijzert
Life of this patent
Estimating the term…
Abstract
Separating survey data for multiple survey sources where first survey data along a first axis measured by a survey sensor device is received, the first survey data responsive to activations of the plurality of survey sources at respective azimuths with respect to the survey sensor device. Second survey data is rotated towards a first azimuth of a first of the plurality of survey sources. The rotated second survey data is used as a model of interference caused by a subset of the plurality of survey sources excluding the first survey source. In other examples, a time dithering technique is performed to separate survey data for multiple survey sources.
Claims13
A method of separating survey data for a plurality of seismic sources, comprising:
- activating the plurality of seismic sources;
- receiving signal from the seismic sources via a seismic sensor for transmission to a system including a processor, wherein the seismic sources are located at respective different azimuths with respect to the seismic sensor;
- receiving, by the system including the processor, first survey data along a first axis measured by the seismic sensor, the first survey data generated by the activating of the plurality of seismic sources;
- receiving, by the system including the processor, second survey data, wherein the second survey data comprises one or more of gradient data measured by the seismic sensor, gradient data computed based on measurement data from the seismic sensor, or horizontal translational data;
- rotating, by the system including the processor, the second survey data towards a first azimuth of a first of the plurality of seismic sources;
- and
- using, by the system including the processor, the rotated second survey data as a model of interference caused by a subset of the plurality of seismic sources excluding the first seismic source, wherein the using comprises subtracting a component based on the rotated second survey data from the first survey data, to separate survey data for the first seismic source.
A system comprising:
- at least one processor configured to:
- receive first survey data along a first axis measured by a seismic sensor, the first survey data including contributions from activations of a plurality of seismic sources located at respective different azimuths with respect to the seismic sensor;
- receive second survey data comprising one or more of gradient data measured by the seismic sensor, gradient data computed based on measurement data from the seismic sensor, or horizontal translational data;
- rotate the second survey data towards a first azimuth of a first of the plurality of seismic sources;
- and
- subtract a component based on the rotated second survey data from the first survey data, to separate survey data for the first seismic source.
Dependencies are inferred from the claim text.