Wide tow enabled by multicomponent marine seismic cable

a multi-component, seismic cable technology, applied in seismology, seismology, instruments, etc., can solve the problems of increasing the number of passes of survey vessels and towed arrays, limiting the coverage of the overall cross-line receiver array, and limiting the maximum spread of the array

Inactive Publication Date: 2008-01-10
WESTERNGECO LLC
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Problems solved by technology

The maximum cable separation, in turn, imposes a limit on overall cross-line receiver array coverage, since the total number of seismic cables is constrained by the towing capacity of any given seismic vessel.
For instance, it limits

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  • Wide tow enabled by multicomponent marine seismic cable
  • Wide tow enabled by multicomponent marine seismic cable
  • Wide tow enabled by multicomponent marine seismic cable

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Embodiment Construction

[0021]Illustrative embodiments of the invention are described below. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort, even if complex and time-consuming, would be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0022]In general, and in a first aspect, the invention includes a method and apparatus by which seismic data is acquired using a “wide tow” array. A “wide tow” array is one in which exceeds the maximum cable spacing for array detection of broadside seismic signal and the discrimination and suppre...

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Abstract

A technique for use in towed-array, marine seismic surveys includes a method and an apparatus. The method includes accessing a set of multicomponent seismic data acquired in a wide tow, marine seismic survey; and interpolating a set of seismic data from the acquired seismic data in the crossline direction such that the combined acquired and interpolated seismic data meet the discrete spatial sampling theory requirements for array detection of broadside seismic signal and the discrimination and suppression of broadside linear noise. In some aspects, the technique includes programmed storage media and/or programmed computers for use in executing such a method. The apparatus is a wide tow array, including a plurality of streamers spaced apart by a cable separation exceeding the maximum cable spacing for array detection of broadside seismic signal and the discrimination and suppression of broadside linear noise as determined by discrete spatial sampling theory.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention pertains to marine seismic surveying and, in particular, to towed-array surveys.[0003]2. Description of the Related Art[0004]Seismic exploration involves surveying subterranean geological formations for hydrocarbon deposits. A survey typically involves deploying acoustic source(s) and acoustic sensors at predetermined locations. The sources impart acoustic waves into the geological formations. The acoustic waves are sometime also referred to as “pressure waves” because of the way they propagate. Features of the geological formation reflect the pressure waves to the sensors. The sensors receive the reflected waves, which are detected, conditioned, and processed to generate seismic data. Analysis of the seismic data can then indicate probable locations of the hydrocarbon deposits.[0005]Some surveys are known as “marine” surveys because they are conducted in marine environments. Note that marine surve...

Claims

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Application Information

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IPC IPC(8): G01V1/387
CPCG01V1/36G01V2210/57G01V1/38
Inventor MORLEY, LAWRENCE C.
Owner WESTERNGECO LLC
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