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Seismic data reconstruction method and device

A seismic data and seismic data volume technology, applied in the field of seismic exploration, can solve the problems of no solution, unsatisfactory effect, and low calculation efficiency of ALFT algorithm, so as to improve spatial sampling attributes, improve the effect of reconstructed data, and improve The effect of image quality

Active Publication Date: 2018-10-16
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

The quality of the initial wavenumber spectrum obtained by the non-uniform Fourier transform directly affects the effect. Therefore, the ALFT method is usually not ideal for large gaps or very uneven distribution data; on the other hand, repeatedly calling the non-uniform Fourier transform to search for the maximum energy position also makes the ALFT algorithm is computationally inefficient
[0008] Based on the above analysis, it can be seen that how to efficiently improve the spatial sampling properties of seismic data and improve the imaging quality of seismic data has not yet proposed an effective solution

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  • Seismic data reconstruction method and device

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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and 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.

[0036] In an embodiment of the present invention, a seismic data reconstruction method is provided, such as figure 1 As shown, the following steps may be included:

[0037] Step 101: Obtain the time-space domain seismic data volume to be reconstructed;

[0038] Wherein, the time-space domain seismic data volume can be excited by seismic waves on the surface, and the excited seismic waves are partially reflected by the underground reflector and then received by receivers arranged on the ground surface, thereby obtaining the time-space domain seismic data volume T(t ,x), where there are multipl...

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Abstract

The invention provides a seismic data reconstruction method and apparatus wherein the method comprises the following steps: obtaining the seismic data body of a to-be-reconstructed time-space domain; performing fast Fourier transform to the seismic data body of the to-be- reconstructed time-space domain along the time direction for the data body in the time-frequency spatial domain; performing non-uniform Fourier transform to the data body in the time-frequency spatial domain according to the actual spatial position in the spatial direction to obtain the data body of the time-frequency spatial wave number domain; calculating for the Gamma matrix corresponding to the data body of the time-frequency spatial wave number domain; calculating the constraint matrix according to the amplitude spectrum of the data body of the time-frequency spatial wave number domain; according to the constraint matrix, calculating and storing the wave number spectrum component of each time frequency slice in an output matrix; and inversely transforming the output matrix into the time-space domain to obtain the seismic data after reconstruction. With the above schemes, the spatial sampling properties of observed data are effectively improved and the imaging quality of seismic data is increased.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a seismic data reconstruction method and device. Background technique [0002] In the current stage of seismic exploration, due to the limitation of exploration funds, field construction conditions and other factors, the collected data often cannot meet the requirements of subsequent imaging for spatial regularity and spatial sampling density of seismic data. Sparse or irregular spatial sampling properties will seriously affect the imaging effect of seismic data, and seismic data reconstruction technology can improve the spatial sampling properties of the observation system to a certain extent, thereby improving the imaging effect of seismic data. [0003] For example, frequency-space domain channel interpolation technology, frequency-wavenumber domain channel interpolation technology, etc. can realize the encryption processing of sparse spatial sampling intervals. H...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 王宝彬钱忠平赵波杨志昱蔡东地孙静
Owner BC P INC CHINA NAT PETROLEUM CORP
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