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US 2020/0271806 A1Published application
Inline source
AssigneePGS Geophysical AS
InventorsStian Hegna, Tilman Kluver
Life of this patent
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Abstract
An inline source can be used for a marine survey. For example, a marine survey vessel can tow source units in line. The source units can be actuated near-continuously to cause a respective signal emitted by each of the source units to be uncorrelated with signals emitted by other of the source units.
Claims20
A method, comprising:
- towing, by a marine survey vessel, a plurality of source units in line;
- and
- actuating the plurality of source units near-continuously to cause a respective signal emitted by each of the plurality of source units to be uncorrelated with signals emitted by other source units of the plurality of source units.
A method, comprising:
- towing a first plurality of source units with a respective crossline separation between successive source units of the first plurality of source units;
- towing a second plurality of source units with a respective crossline separation between successive source units of the second plurality of source units;
- actuating the first plurality of source units near-continuously to cause a respective signal emitted by each of the first plurality of source units to be uncorrelated with signals emitted by other source units of the first plurality of source units;
- and
- actuating the second plurality of source units near-continuously to cause a respective signal emitted by each of the second plurality of source units to be uncorrelated with signals emitted by other source units of the second plurality of source units.
2 more elements
A system, comprising:
- a plurality of source units configured to be coupled to a marine survey vessel;
- and
- a controller configured to be coupled to the plurality of source units, wherein the controller is further configured to:
- operate a first source unit of the plurality of source units near-continuously to cause the first source unit to emit a first broadband signal;
- and
- operate a second source unit of the plurality of source units near-continuously to cause the second source unit to emit a second broadband signal;
- wherein the first broadband signal is uncorrelated with the second broadband signal;
- and
- wherein the first broadband signal and the second broadband signal create a combined signal having a temporal length at a location greater than a respective temporal length of the first broadband signal or the second broadband signal at the location.
6 more elements
A non-transitory machine-readable medium storing a set of instructions executable by a processing resource to:
- cause each of a plurality of source units to emit a respective band limited white noise signal, wherein the plurality of source units are arranged in line for towing by a marine survey vessel;
- and
- operate the plurality of source units near-continuously to cause the respective band limited white noise signal from each of the plurality of source units to be emitted near a same location at different times.
A method to manufacture a geophysical data product, the method comprising:
- obtaining geophysical data from a marine survey, wherein the marine survey includes:
- towing, by a marine survey vessel, a plurality of source units in line;
- and
- actuating the plurality of source units near-continuously to cause a respective signal emitted by each of the plurality of source units to be uncorrelated with signals emitted by other source units of the plurality of source units;
- processing the geophysical data to generate the geophysical data product;
- and
- recording the geophysical data product on a non-transitory machine-readable medium, thereby creating the geophysical data product.
4 more elements
Dependencies are inferred from the claim text.