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Air gun array wavelet directional deconvolution method and system

A directional and deconvolution technology, applied in the field of oil and gas geophysical exploration, can solve the problems of false frequency and reduce the actual application effect, and achieve the effect of improving processing accuracy and eliminating directional effect

Active Publication Date: 2018-12-07
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] The above-mentioned directional deconvolution method needs to solve a series of problems such as aliasing, end effect and interpolation, and the calculation of its exit angle requires the assumption of a horizontal layered medium, which reduces the actual application effect

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  • Air gun array wavelet directional deconvolution method and system
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Embodiment Construction

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0032] Please refer to figure 1 As shown, the airgun array wavelet directional deconvolution method provided by the present invention specifically includes: S101 calculates and obtains the directional deconvolution filter according to the spatial position of each airgun and its corresponding imaginary wavelet; S102 obtains the directional deconvolution filter according to the common detection Point seismic data, using τ-p transformation to obtain angle-domain seismic data; S103 calculating and obtaining seismic record data according to the angle-domain seismic data a...

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Abstract

The invention provides an air gun array wavelet directional deconvolution method and system. The method comprises the following steps: obtaining a directional deconvolution filter through calculationaccording to the spatial position of each air gun and corresponding imaginary wavelets; obtaining angle domain seismic data through [tau]-p transform on the basis of common detection point seismic data; obtaining seismic record data through calculation on the basis of the angle domain seismic data and the directional deconvolution filter; on the basis of the seismic record data, obtaining final seismic data through inverse Fourier transform and inverse [tau]-p transform. In this way, the spatial distribution of an air gun array and the influence of sea surface ghosting are comprehensively taken into consideration, the directional deconvolution filter is constructed to perform directional deconvolution on offshore seismic data, directional effects of wavelets of the air gun array are eliminated, and the processing accuracy of offshore seismic data is improved.

Description

technical field [0001] The invention relates to the field of oil and gas geophysical exploration, in particular to an air gun array wavelet directional deconvolution method and system. Background technique [0002] Seismic exploration is an exploration method that uses artificial seismic technology to detect underground structures. It adopts a certain way to artificially excite and receive seismic waves, and detects underground structures through the processing and analysis of reflected signals. Different exploration areas use different excitation sources. Due to its stable and reliable performance, safety and environmental protection, the air gun has become the most widely used source in marine seismic exploration. Since the excitation signal of a single air gun is too weak and the subsequent bubble pulse interference is strong, it is difficult to meet the requirements of the signal-to-noise ratio and resolution of seismic data, so the air gun array is used for combined e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/32
Inventor 李国发郭祥辉李皓刘滋张思超周碧霄刘金涛
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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