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Reverse time migration method of three-dimensional VSP data

A reverse time migration, three-dimensional technology, applied in the field of geophysical exploration, can solve the problem of no reverse time migration imaging, etc., to achieve the effect of improving low calculation efficiency, strong adaptability, and reducing dispersion

Inactive Publication Date: 2014-07-16
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned reverse time migration method studies and analyzes the theory and key technologies from different angles, there is almost no research on reverse time migration imaging for 3D VSP data

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  • Reverse time migration method of three-dimensional VSP data
  • Reverse time migration method of three-dimensional VSP data
  • Reverse time migration method of three-dimensional VSP data

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Embodiment Construction

[0040] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Additionally, the scope of protection of the present invention should not be limited only to the following specific steps or specific parameters. The present invention is not limited to model data, but can process actual data and has wide adaptability.

[0041] A method for reverse time migration of three-dimensional VSP data disclosed by the present invention comprises the following steps:

[0042] 1) The geophones are arranged at equal vertical interv...

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Abstract

The invention discloses a reverse time migration method of three-dimensional VSP data. The reverse time migration method of the three-dimensional VSP data carries out three-dimensional VSP data reverse time migration based on a three-dimensional acoustic wave equation, can achieve accurate imaging for a complex structure around a well by making full use of the rich wave field information in the VSP data and the imaging capacity of the reverse time migration method on a complex wave field, and provides favorable guidance for complex reservoir exploration. The reverse time migration method of the three-dimensional VSP data takes the wave field information (multiple waves, diffracted waves and the like) accentually existing underground into full account, and does not simplify the wave equation. The method carries out central difference solution on a partial differential equation by using an optimized finite difference coefficient, and is higher in accuracy and more stable in calculation compared with a traditional method. The method is applied to three-dimensional VSP seismic data processing and has great significance for small fracture image beside the well, reservoir forecast, micro-structure implementation and exploration and development of subtle reservoirs.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and relates to a method for reverse time migration of three-dimensional VSP data. Specifically, the reverse time migration method is used to perform imaging processing on three-dimensional VSP seismic data, thereby realizing accurate imaging of underground structures. Background technique [0002] In seismic data processing, migration is always a key part of the processing link, and the accuracy of migration also affects the accuracy of follow-up work such as seismic interpretation. In order to improve the imaging effect of complex underground geological bodies and accurately identify underground reservoirs, seismic data processing technology needs to be continuously developed to meet actual needs. Reverse time migration is the migration method with the highest imaging accuracy among various current migration algorithms. The method itself is based on the two-way wave wave equation, and almo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/40
Inventor 王维红石颖陈树民郭雪豹柯璇刘诗竹王建民
Owner NORTHEAST GASOLINEEUM UNIV
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