Seismic scattering wave imaging method

A technology of seismic scattering and imaging method, applied in the direction of seismic signal processing, etc., can solve the problems of increasing imaging effect, unable to deal with various geological structures and terrain imaging, and narrow application range.

Inactive Publication Date: 2012-04-25
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

[0005] The invention discloses a seismic scattering wave imaging method, which overcomes the shortcomings of the traditional reflected wave imaging method that the scope of application is narrow and cannot deal with various geological structures and terrain imaging actually faced, and can image complex fault blocks, veins, lenticular The imaging of geological bodies such as ore bodies increases the imaging effect; and the obtained scattering gathers are smoother, the energy distribution is reasonable, the signal-to-noise ratio is high, and the migration velocity is easy to obtain, and the imaging method provided eliminates the co-scattering point channel of the converted wave set step noise

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[0080] The essence of the present invention can be better understood in conjunction with the accompanying drawings, but the accompanying drawings are only used to illustrate the results obtained by applying the method of the present invention to a specific geological example, and are not intended to limit the present invention or limit the present invention to be used only for Handle the attached examples.

[0081] The invention discloses a seismic scattering wave imaging method, comprising the following steps

[0082] 1. Read in seismic data;

[0083] 2. Calculate the equivalent offset position where each sampling point of each input channel is mapped to the scatter point gather, and extract the scatter point gather; the formation of the common scatter point gather is processed by the following method:

[0084] t i = 2 xh v mig ...

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Abstract

The invention discloses a seismic scattering wave imaging method, overcoming the defects that the traditional reflection wave imaging method has narrow application range and can not process multiple practical geologic structures and terrain imaging and capable of imaging geologic bodies such as a complex fault block, a dike, a lenticulated ore body and the like and enhancing imaging effect. The obtained scattering trace gather is smoother, energy distribution is reasonable, signal to noise ratio is high, migration velocity is easy to obtain, and stepped noise of a converted wave is eliminated. Further, the invention also discloses a seismic scattering wave imaging system on the basis of the seismic scattering wave imaging method, used for seismic scattering wave imaging; and the seismic scattering wave imaging system has the advantages of wide application range, good imaging effect, smooth scattering trace gather and high signal to noise ratio, and the stepped noise of the converted wave can be eliminated aimed at a common scattered point scattering trace gather of the converted wave.

Description

technical field [0001] The invention discloses a seismic wave scattering imaging method, which belongs to the technical field of seismic wave imaging processing. Background technique [0002] Today, seismic imaging technology mainly uses the reflected energy of seismic waves, according to the Fermat principle in seismic kinematics: the time along the path perpendicular to the front of the wave is the shortest, that is, the wave propagates along the ray, and the energy of the wave propagating along the ray is the shortest. Strong. The ray propagation conforms to Snell's theorem. The reflection wave method is only applicable when the occurrence of the underground medium interface is gentle. The actual geological problems are often very complicated, such as metal ore exploration, oil exploration in complex areas, and engineering in complex lithology areas. Exploration, etc., the exploration target has complex geological structures, developed faults, steep stratum dips, or later...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 高星王伟历玉英
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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