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Energy consistency matching method and system based on single-channel data

A matching method and energy matching technology, applied in the field of geophysical exploration, can solve problems such as data amplitude gaps, achieve the effects of accelerating convergence speed, good matching, and enhancing solution stability

Active Publication Date: 2021-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] This method performs energy matching according to the relationship between the two norms of the data of the entire gather of the two data, and there may still be a large gap in the amplitude of the matched data

Method used

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  • Energy consistency matching method and system based on single-channel data
  • Energy consistency matching method and system based on single-channel data
  • Energy consistency matching method and system based on single-channel data

Examples

Experimental program
Comparison scheme
Effect test

application example 1

[0063] model test

[0064] figure 2 A schematic diagram of single-shot observation data according to Application Example 1 of the present invention is shown, the ordinate represents time (s), and the abscissa represents the number of traces.

[0065] image 3 A schematic diagram of demigration single-shot data according to Application Example 1 of the present invention is shown, the ordinate represents time (s), and the abscissa represents the number of traces. Compared figure 2 , according to the energy axis range of the two data, it can be seen that there is a very large difference between the demigration record energy obtained without energy matching and the observed data, and the direct calculation of the least squares residual will inevitably reduce the objective function. convergence speed.

[0066] Figure 4a with Figure 4b are shown respectively image 3 Schematic diagram of energy-matched single-shot data obtained according to Method 2 of the prior art and t...

application example 2

[0068] real data experiment

[0069] Figure 5 A schematic diagram of single-shot observation data according to Application Example 2 of the present invention is shown, the ordinate represents time (s), and the abscissa represents the number of traces.

[0070] Image 6 A schematic diagram of demigration single-shot data according to Application Example 2 of the present invention is shown, the ordinate represents time (s), and the abscissa represents the number of traces. Compared Figure 5 It can be seen that there is a large energy difference between the demigrated data and the actual data.

[0071] Figure 7a with Figure 7b are shown respectively Image 6 Schematic diagram of energy-matched single-shot data obtained according to Method 2 of the prior art and the method of the present invention, the ordinate represents time (s), and the abscissa represents the number of traces. As can be seen from the figure, the energy of the demigration data obtained after energy m...

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Abstract

Disclosed are an energy consistency matching method and system based on single-channel data. The method may include: taking each single-track data of the actual observation data as a target track, and performing the following steps for each target track: calculating a matching operator according to the target track; Energy matching is performed on the seismic traces in , and the matching traces corresponding to the target traces are obtained. Through the energy consistency matching based on single-channel data, the present invention can more accurately correct the amplitude of the simulated data so that it is equivalent to the energy of the observed data, thereby improving the convergence stability of the method and technology, which is the best method for the least squares migration, especially for the actual data. Handling provides strong technical support.

Description

technical field [0001] The present invention relates to the technical field of geophysical exploration, and more specifically, to an energy consistency matching method and system based on single-channel data. Background technique [0002] The core of the least squares migration algorithm is to judge the accuracy of imaging according to the degree of matching between the demigration simulated data and the observed data, and to correct the imaging results according to the residual error. In order to eliminate the amplitude difference between the observed data and the demigration simulation data due to wavelets and other factors, it is necessary to correct the amplitude of the demigration simulation data so that the amplitude is at the same magnitude as the observation data, and then obtain Data residuals. [0003] At present, there are mainly the following methods for energy matching of actual data: [0004] Method 1: Normalized residual, as shown in formula (3), [0005] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
CPCG01V1/362
Inventor 陶永慧段心标韩冬
Owner CHINA PETROLEUM & CHEM CORP
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