Method and system of acquiring seismic data in an area having periodic acoustic interference
AssigneeWesternGeco L.L.C.
InventorKevin John Deal
Life of this patent
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Abstract
A seismic data acquisition method and system are shown. The method acquires seismic data using an acoustic source capable of producing a seismic signal and an acoustic receiver in an area having periodic acoustic interference. The method includes sensing a time window in which the periodic acoustic interference at the acoustic receiver is substantially attenuated, and adjusting the acoustic source's discharge time so a desired portion f a seismic signal produced by the acoustic source arrives at the acoustic receiver within a subsequent time window.
Claims16
A method of acquiring seismic data using an acoustic source capable of producing a seismic signal and an acoustic receiver in an area having periodic acoustic interference, said method comprising the steps of:
- sensing a time window in which said periodic acoustic interference at said acoustic receiver is substantially attenuated, and
- adjusting said acoustic source's discharge time so a desired portion of a seismic signal produced by said acoustic source arrives at said acoustic receiver within a subsequent time window.
A method of acquiring seismic data using a seismic survey vessel, having an acoustic source capable of producing a seismic signal and an acoustic receiver, in the general vicinity of a second vessel having an acoustic source and wherein an acoustic signal produced by said second vessel's acoustic source may be sensed by said acoustic receiver of said seismic survey vessel, said method comprising the steps of:
- sensing a time window in which said acoustic signal from said second vessel's acoustic source is substantially attenuated, and
- adjusting said seismic survey vessel acoustic source's discharge time so a desired portion of a seismic signal produced by said seismic survey vessel's acoustic source arrives at said acoustic receiver within a subsequent time window.
A method of acquiring seismic data using a seismic survey vessel, having one or more acoustic sources capable of producing seismic signals and an acoustic receiver, in an area having periodic acoustic interference, said method comprising the steps of:
- sensing said periodic acoustic interference;
- determining said periodic acoustic interference's cycle time,
- discharging said acoustic sources at said periodic acoustic interference's cycle time,
- determining whether portions of seismic signals produced by said acoustic sources associated with subsurface depths at which hydrocarbon deposits are most likely arriving at said acoustic receiver in time windows in which said periodic acoustic interference is substantially attenuated near said seismic survey vessel, and
- adjusting said seismic survey vessel acoustic sources' discharge times so portions of seismic signals produced by said acoustic sources associated with subsurface depths in which hydrocarbon deposits are most likely arriving at said acoustic receiver in said time windows.
A seismic survey vessel navigation and control system for a seismic survey vessel having an acoustic source capable of producing a seismic signal and an acoustic receiver for use in an area having periodic acoustic interference, said system comprising:
- means for sensing when said periodic acoustic interference at said acoustic receiver is substantially attenuated, and
- means for adjusting said acoustic source's discharge time so a desired portion of a seismic signal produced by said acoustic source arrives at said acoustic receiver within a subsequent time window.
Seismic data acquired using an acoustic source capable of producing a seismic signal and an acoustic receiver in an area having periodic acoustic interference, said seismic data acquired by the process of:
- sensing a time window in which said periodic acoustic interference at said acoustic receiver is substantially attenuated,
- adjusting said acoustic source's discharge time so a desired portion of a seismic signal produced by said acoustic source arrives at said acoustic receiver within a subsequent time window, and
- recording said desired portion of said seismic signal.
Dependencies are inferred from the claim text.