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Three-dimensional VSP seismic data interpolation method based on weighted matching pursuit

A seismic data, matching tracking technology, applied in the field of geological exploration, can solve the problems of spatial aliasing, inability to interpolate VSP data, unfavorable data processing and interpretation, etc., and achieve the effect of avoiding spatial aliasing

Pending Publication Date: 2019-09-06
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Conventional VSP data interpolation methods are prone to spatial aliasing, which is not conducive to subsequent data processing and interpretation; interpolation methods used for conventional seismic data cannot directly interpolate VSP data due to differences in observation systems

Method used

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  • Three-dimensional VSP seismic data interpolation method based on weighted matching pursuit
  • Three-dimensional VSP seismic data interpolation method based on weighted matching pursuit
  • Three-dimensional VSP seismic data interpolation method based on weighted matching pursuit

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention Inside.

[0044] Such as figure 1 As shown, firstly, according to the coordinates of the three-dimensional VSP data to be interpolated, the spatial position of the data is obtained, and the spatial position is irregular.

[0045] Then, according to the expected spatial position of the interpolated data, the position without seismic data is filled with blank data, and the size and coordinate positi...

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Abstract

The invention discloses a three-dimensional VSP seismic data interpolation method based on weighted matching pursuit. The method comprises the following steps: S1, respectively carrying out static correction, deconvolution and VSP dynamic correction on the original seismic data acquired in the field, and eliminating the inter-track time difference of different offset distances to obtain three-dimensional VSP seismic data before interpolation; S2, obtaining a space sampling position of the three-dimensional VSP seismic data according to shot point coordinates of the three-dimensional VSP seismic data before interpolation; S3, encrypting the three-dimensional VSP seismic data before interpolation in the space direction by using blank data to obtain a data volume of a space sampling rule; S4,performing F-K conversion on the data volume of the space sampling rule obtained in S3 to obtain an F-K spectrum; S5, performing linear radon transform on the F-K spectrum, and solving a weighted operator according to a radon transform result; S6, processing the F-K spectrum by using the weighted operator obtained in S5 to obtain a new F-K spectrum; and S7, performing F-K inverse transformation on the new F-K spectrum to obtain interpolated three-dimensional VSP seismic data.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a three-dimensional VSP seismic data interpolation method based on weighted matching and pursuit. Background technique [0002] At present, 3D VSP technology is a high-precision seismic physics technology, which can obtain high-precision 3D imaging data. It has been widely used to finely describe the complex structures around the well, the spatial distribution of reservoirs and fluids, and is known as the combination of surface, cross-well seismic, logging and geology. "bridge". [0003] Because VSP data collection is usually irregular in space, it affects the processing and interpretation of subsequent data. Therefore, it is necessary to perform interpolation before migration and encrypt it into data with regular spatial sampling. Conventional VSP data interpolation methods are prone to spatial aliasing, which is not conducive to subsequent data processing and interpreta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 张猛隆文韬王兴谋苗永康孔庆丰孙卫国赵茂强揭景荣
Owner CHINA PETROLEUM & CHEM CORP
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