Method based on graphics processor for computing direct pre-stack reverse-time migration based on irregular topography

A pre-stack reverse time migration, graphics processor technology, applied in seismic signal processing and other directions, can solve the problems of complex surface velocity structure, difficult to improve calculation accuracy, limited application and other problems, achieve obvious advantages in imaging effects, and solve the problem of free boundary reflection. , to solve the effect of huge amount of calculation

Inactive Publication Date: 2012-02-15
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Traditional seismic imaging methods mainly have two problems in areas with complex surface and complex structures: one is that the surface has large undulations, and the surface velocity structure is very complex; the other is that the underground structure is complex, such as strong folds, fault development, steep structures, and formation changes Big and so on
[0004] For the solution of the two-way wave wave equation on the undulating surface, the finite element method is more convenient to deal with the irregular surface, but the calculation efficiency is low, the calculation accuracy is difficult to improve, and it is not convenient to use
The combination of finite element and other methods, such as discrete wavenumber and domain splitting, has improved the calculation efficiency to a certain extent, but the problems of low calculation accuracy and inconvenient use have not been fundamentally solved.
The semi-analytical nature of the boundary integral or boundary element method determines that this method cannot be applied to the case of large surface velocity changes, which limits its application in actual exploration

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  • Method based on graphics processor for computing direct pre-stack reverse-time migration based on irregular topography
  • Method based on graphics processor for computing direct pre-stack reverse-time migration based on irregular topography
  • Method based on graphics processor for computing direct pre-stack reverse-time migration based on irregular topography

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Embodiment Construction

[0042] The invention will be further elaborated below in conjunction with the accompanying drawings in conjunction with the embodiments. Those skilled in the art should know that the present invention also can have multiple different forms or use different graphics processors or different general computing functions to implement, so it should not be considered as limiting Examples listed in the specification. The actual application effect of the present invention is related to the specific graphics processor hardware. Within a certain range, the more stream processors the graphics processor has and the faster the speed, the better the effect of speed improvement will be.

[0043] combined with figure 1 , 2 It can be understood that the principle and process of the method for calculating the direct pre-stack reverse time migration of the undulating land surface based on the graphics processor of the present invention, that is, the high-speed calculation can be realized by ut...

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Abstract

The invention discloses a method based on a graphics processor for computing direct pre-stack reverse-time migration based on an irregular topography. Migration imaging is directly performed from the irregular topography by applying a reverse-time migration method, and solving is performed by adopting a finite difference method, and the computation speed and efficiency is obviously improved by utilizing the concurrent computation characteristic of the graphics processor.

Description

technical field [0001] The invention relates to a method for calculating and calculating direct pre-stack reverse time migration of undulating land surface, in particular to a method for calculating and calculating direct pre-stack reverse time migration of undulating land surface based on a graphic processor. Background technique [0002] With the continuous development of seismic exploration technology, the focus of oil and gas seismic exploration is shifting to areas with undulating surface conditions and complex geological conditions, such as mountains, beaches, and swamps, which pose new challenges to seismic exploration and data processing. Traditional seismic imaging methods mainly have two problems in areas with complex surface and complex structures: one is that the surface has large undulations, and the surface velocity structure is very complex; the other is that the underground structure is complex, such as strong folds, fault development, steep structures, and st...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 刘红伟佟小龙刘洪李博刘钦
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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