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US 8,174,927 B2Granted
Method for optimizing acoustic source array performance
AssigneeWesternGeco L.L.C.
InventorsJon-Fredrik Hopperstad, Robert Laws, Aslaug Stroemmen Melboe
Life of this patent
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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.
Claims19
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 by desynchronizing triggering of the acoustic sources in a manner such that the power spectrum of the array is attenuated at frequencies outside of a desired seismic frequency band without substantially affecting output within the desired frequency band.
1 more element
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;
- determining triggering delays for the acoustic sources by time-aligning the notional source signatures;
- utilizing time-break sensors to detect an attribute associated with a time-break sensor signal;
- comparing processed time delays based on detection of the attribute with direct synchronization time delays obtained through the calculation of notional source signatures and the determination of triggering delays by time-aligning the notional source signatures;
- and
- using the comparing to validate the actual triggering delays implemented.
5 more elements
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 such that the power spectrum of the array is attenuated at frequencies outside of a desired seismic frequency band without substantially affecting output within the desired frequency band.
1 more element
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;
- performing a comparison of process time delays with direct synchronization time delays;
- using the comparison to validate actual triggering delays;
- and
- triggering the acoustic source elements according to the triggering delays.
3 more elements
Dependencies are inferred from the claim text.