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Reconstructing impulsive source seismic data from time distributed firing airgun array data

A technology of seismic data and pulse source, applied in the field of seismic survey, can solve the problems of space reconstruction, notch frequency space reconstruction, amplification, etc.

Inactive Publication Date: 2017-02-22
SCHLUMBERGER TECH LTD BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, errors are introduced into the deconvolution result (noise is amplified), or if the deconvolution is properly stabilized, this introduces sidelobes (it should be noted that stabilizing the deconvolution extreme case of just cross-correlating the data)
[0011] Spatial reconstruction can become difficult where source sampling spacing results in spatially aliased data
Typically, airgun sources are fired every 25m, allowing good sampling (spatially non-aliased) of the seismic wavefield on the source side from a frequency of only 30 Hz (assuming a water velocity of 1500 m / s); Spatial reconstruction of the notch frequency becomes difficult when the frequency

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  • Reconstructing impulsive source seismic data from time distributed firing airgun array data
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  • Reconstructing impulsive source seismic data from time distributed firing airgun array data

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[0029] Reference will now be made in detail to various embodiments, examples of which are illustrated in the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the subject matter herein. It will be apparent, however, to one of ordinary skill in the art that the described subject matter may be practiced without these specific details. In other instances, numerous well-known methods, procedures, components, and systems have not been described in detail so as not to unnecessarily obscure aspects of the implementations.

[0030] It will also be understood that although the terms first, second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish these elements from each other. For example, a first object or step could be termed a second object or step, and, similarly, a second object or st...

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Abstract

Acquiring seismic data using time-distributed sources and converting the acquired data into impulsive data using a multiple-frequency approach. The methods are performed in frequency-source location domain, frequency-wavenumber domain, or frequency-slowness domain. The methods are applicable to single source acquisition or simultaneous source acquisition.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application Serial No. 61 / 968,167, filed March 20, 2014, which is hereby incorporated by reference in its entirety. [0003] Background of the invention [0004] The present disclosure relates to seismic surveys for oil and gas, and particularly, but not limitedly, to seismic data acquisition and processing of acquired data using time-distributed seismic sources. [0005] Seismic surveying involves the detection of hydrocarbon deposits in subsurface geological formations. Surveying may involve deploying seismic sources and sensors at predetermined locations. The seismic source generates a shock wave that propagates into the geological formation, producing pressure changes and vibrations along the way. Changes in the elastic properties of the geological formations spread out the shock waves, changing their direction of propagation and other properties. A porti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/38G01V1/08G01V1/09G01V1/137
CPCG01V1/364G01V1/3808G01V1/3861G01V2210/127G01V1/306G01V1/307G01V1/38G01V2210/62
Inventor D.F.哈利迪
Owner SCHLUMBERGER TECH LTD BV