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Near-surface chromatography inversion static rectification method of rarefied seismic data

A seismic data and tomographic inversion technology, applied in the field of geophysical exploration, can solve the problem of long calculation period of static correction of near-surface tomographic inversion, and achieve the advantages of improving the first arrival picking accuracy, improving the calculation efficiency and reducing the amount of data. Effect

Inactive Publication Date: 2012-12-12
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a near-surface tomographic inversion of sparse seismic data that solves the problem of long calculation period of near-surface tomographic inversion static correction, improves the calculation efficiency of tomographic inversion static correction, and does not affect the quality of data. static correction method

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  • Near-surface chromatography inversion static rectification method of rarefied seismic data
  • Near-surface chromatography inversion static rectification method of rarefied seismic data
  • Near-surface chromatography inversion static rectification method of rarefied seismic data

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[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] A near-surface tomographic inversion static correction method that solves the problem of long calculation period of near-surface tomographic inversion static correction, improves the calculation efficiency of tomographic inversion static correction, and does not affect the quality of data. The following steps are completed.

[0033] 1) Collect seismic data and perform thinning;

[0034] Shot and trace thinning of seismic data, figure 1 It is the comparison of shot points before and after thinning of theoretical 3D data. After thinning, the distance between shot points is 180 meters, and a receiving line is extracted from the thinning shot (Figure 2-b is the record of extracting a receiving line);

[0035] 2) Pick up the first arrival of seismic data;

[0036] Perform fine first-arrival picking on the thinned 3D seismic data, as shown in Figure 2-b.

[0037...

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Abstract

The invention discloses a near-surface chromatography inversion static rectification method of rarefied seismic data of geophysical exploration. The method includes collecting the seismic data and performing rarefying, performing first break picking on the seismic data, confirming chromatography inversion grids and the first break shift range of a chromatography inversion application, building a near-surface chromatography velocity model by using the first break time when the rarefied seismic data is picked and the confirmed chromatography inversion parameters, and computing a static rectification value. According to the method, the computational efficiency of high chromatography inversion static rectification is improved, the near-surface chromatography inversion static rectification method of rarefied seismic data of data qualities is not affected simultaneously, and the computational efficiency and the profile stacking effect are improved.

Description

technical field [0001] The invention relates to a geophysical exploration method, in particular to a static correction method for near-surface tomography inversion of seismic data. Background technique [0002] In geophysical seismic exploration, tomographic inversion static correction method is one of the main methods to solve the static correction problem in complex areas. The basic data of the tomographic inversion static correction method is the first arrival time. At present, seismic exploration is developing towards high-density acquisition. The physical point density is getting higher and higher, and the receiving arrangement is increasing. The workload of first arrival picking is also increasing sharply. The calculation amount of tomographic inversion is increased and the calculation period is long, so it is difficult to meet the period requirement of seismic data processing, and the application effect of tomographic static correction involving all shots may not nece...

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Application Information

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IPC IPC(8): G01V1/36
Inventor 祖云飞李培明冯泽元马青坡闫智慧侯喜长杨晓玲
Owner BC P INC CHINA NAT PETROLEUM CORP
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