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 gap, and achieve the effect of accelerating convergence speed, enhancing solution stability, and good matching.

Active Publication Date: 2020-04-07
CHINA PETROLEUM & CHEM CORP +1
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  • 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

The invention discloses an energy consistency matching method and system based on single-channel data. The method comprises the following steps: taking each piece of single-channel data of actual observation data as a target channel, and performing the following steps for each target channel: calculating a matching operator according to the target channel; and according to the matching operator, performing energy matching on the seismic trace in the analog data corresponding to the target trace to obtain a matching trace corresponding to the target trace. According to the method, through energy consistency matching based on single-channel data, amplitude correction can be accurately carried out on analog data to enable the analog data to be equivalent to observation data energy, so that the technical convergence stability of the method is improved, and powerful technical support is provided for processing of least square offset, especially actual data.

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 Applications(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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