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Offshore inclined cable wideband seismic prospecting static correction method based on wave field continuation

A technology of wave field continuation and seismic exploration, applied in the field of seismic exploration, can solve the problems of seismic wave fluctuation characteristics change, amplitude distortion, etc., and achieve the effect of maintaining fluctuation characteristics and accurate static correction results

Inactive Publication Date: 2017-08-11
XIJING UNIV
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Problems solved by technology

The invention solves the problem of amplitude distortion and the problem of seismic wave fluctuation characteristic change existing in the static correction of oblique cable broadband seismic exploration

Method used

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  • Offshore inclined cable wideband seismic prospecting static correction method based on wave field continuation
  • Offshore inclined cable wideband seismic prospecting static correction method based on wave field continuation
  • Offshore inclined cable wideband seismic prospecting static correction method based on wave field continuation

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Embodiment Construction

[0025] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] refer to figure 1 As shown, the present invention aims at the problem of elevation static correction in offshore cable broadband seismic exploration technology, and proposes a wave field static correction method based on wave field continuation, aiming at solving the problems existing in the static correction processing of offshore cable broadband seismic exploration Problems with changing volatility characteristics. The implementation steps of this method are: "geophone coordinate picking - polynomial fitting cable shape - physical simulation realization - static correction processing".

[0027] The first step is to fit the cable shape in the oblique cable broadband seismic exploration technology. In traditional offshore surveying, the geophones on the same cable are at the same horizontal height, but the cable is inclined during i...

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Abstract

The invention relates to an offshore cable wideband seismic prospecting static correction method based on wave field continuation. The method comprises steps of 1), seismic record storage and detector coordinate pickup; 2), detector coordinate gridding; and 3), seismic data continuation static correction processing. The method is advantaged in that seismic wave fluctuation characteristics are reserved through a static correction scheme based on wave field continuation, high precision seismic prospecting demands can be satisfied, and an accurate static correction result is provided for offshore seismic prospecting.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration, and in particular relates to a static correction method for broadband seismic exploration of offshore inclined cables based on wave field continuation. Background technique [0002] In marine seismic exploration, the conventional seismic data acquisition method is to sink the source and the cable at the same depth. The high wave impedance difference between sea water and air at sea level makes the ghost reflection notch frequency a fixed value, so it is difficult to eliminate the influence of ghost reflection. Influence of effective seismic signal. That is to say, the depth of immersion directly restricts the frequency band width of seismic data, and cables with different depths will form notch effects of different frequencies, and the conventional acquisition method of towing operations can no longer meet the current exploration needs. In recent years, the newly proposed cable broad...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/362
Inventor 刘洋
Owner XIJING UNIV