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Method for quantitative analysis and evaluation of vertical resolution of three dimensional seismological observation system

A seismic observation system and vertical resolution technology, applied in seismic signal processing and other directions, to achieve the effect of improving oil and gas exploration efficiency, fast calculation speed, and promoting application

Active Publication Date: 2017-06-20
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, the method of using confocal analysis to calculate the horizontal resolution cannot be directly used to calculate the vertical resolution.

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  • Method for quantitative analysis and evaluation of vertical resolution of three dimensional seismological observation system
  • Method for quantitative analysis and evaluation of vertical resolution of three dimensional seismological observation system
  • Method for quantitative analysis and evaluation of vertical resolution of three dimensional seismological observation system

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the method for quantitative analysis and evaluation of the vertical resolution of the three-dimensional seismic observation system of the present invention comprises the following steps:

[0027] 1) Given the complex velocity model, the seismic observation system to be evaluated, and the location information of the underground target point, the seismic observation system to be evaluated is subjected to wave field continuation under complex geological conditions, and the frequency-domain waves propagated from the underground target point to the receiver points on the ground are obtained. field information.

[0028] Among them, the complex velocity model and the seismic observation system to be evaluated are both existing technologies, and will not be described in detail in the present invention.

[0029] 2) Use the c...

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Abstract

The invention relates to a method for the quantitative analysis and evaluation of vertical resolution of a three dimensional seismological observation system, and the method is characterized in that the method comprises the following steps: 1), giving a complex speed model, a to-be-evaluated seismological observation system and the position information of an underground target point, carrying out the wave field extension of the seismological observation system under the complex geologic conditions, and obtaining the frequency domain wave field information transmitted from the underground target point to each ground detection point; 2), respectively carrying out the vertical co-focusing of the frequency domain wave field information of all ground detection points, and obtaining the co-focusing result of each ground detection point at the underground target point; 3), calculating and obtaining a co-focusing result of the whole seismological observation system; 4), calculating a main lobe width according to the vertical co-focusing result; 5), calculating a main lobe amplitude occupancy ratio according to the main lobe width; 6), carrying out the analysis of the seismic migration imaging of the seismological observation system according to the obtained main lobe width and the obtained main lobe amplitude occupancy ratio. The method can be widely used in the design and analysis of the seismological observation system.

Description

technical field [0001] The invention relates to a design and evaluation method of a three-dimensional seismic observation system for seismic exploration, in particular to a method for quantitative analysis and evaluation of the vertical resolution of the three-dimensional seismic observation system. Background technique [0002] With the development of seismic exploration technology, seismic exploration has gradually changed from high-density to high-precision exploration, and the seismic observation system is one of the key factors affecting seismic imaging, and the design requirements for seismic observation systems are also getting higher and higher. The quality of seismic imaging is generally described by seismic resolution. Seismic resolution refers to the ability to distinguish two adjacent events, which is divided into time resolution and spatial resolution in time domain and space domain. Among them, the resolution in the spatial domain is divided into horizontal re...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 符力耘苏俊魏伟孙伟家
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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