Method for optimizing acoustic source array performance
AssigneeWesternGeco L.L.C.
InventorsJon-Fredrik Hopperstad, Robert Laws, Aslaug Stroemmen Melboc
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Abstract
A technique facilitates obtaining seismic data in a marine environment. An array of acoustic sources is deployed in a marine environment. The array can be utilized for creating acoustic pulses that facilitate the collection of data on subsea structures. The methodology enables optimization of acoustic source array performance to improve the collection of useful data during a seismic survey.
Claims22
A method, comprising:
- deploying an array of acoustic sources in a marine environment;
- creating acoustic pulses with the acoustic sources to obtain data on subsea structures;
- and
- deliberately scattering acoustic source synchronization in a manner that attenuates the amplitude at out of band frequencies.
The method as s recited in claim 1, wherein deliberately scattering comprises scattering triggering times of the acoustic sources.
The method as recited in claim 1, wherein deliberately scattering comprises scattering the position of the acoustic sources.
The method as recited in claim 1, further comprising using a plurality of hydrophones to detect the acoustic pulses.
The method as recited in claim 1, wherein deliberately scattering comprises selecting time delays such that signal amplitudes outside a predetermined seismic band are attenuated while signal amplitudes within the predetermined band are substantially unaffected.
A method, comprising:
- deploying an array of acoustic sources and hydrophones in a marine environment;
- creating acoustic pulses with the acoustic sources;
- synchronizing the acoustic sources by processing notional source signatures from nearfield hydrophone measurements;
- and
- determining triggering delays for the acoustic sources by time-aligning the notional source signatures.
A method, comprising:
- operating an array of acoustic sources in a marine environment to obtain seismic data;
- using the array of acoustic sources to deliver primary pressure pulses into the marine environment;
- and
- deliberately desynchronizing alignment of the primary pressure pulses.
A method for use in obtaining seismic data in a marine environment, comprising:
- determining notional source signatures from nearfield hydrophone measurements in a marine environment;
- establishing triggering delays of acoustic source elements by time-aligning the notional source signatures;
- and
- triggering the acoustic source elements according to the triggering delays.
Dependencies are inferred from the claim text.