Mass data GPU (graphics processing unit) wave equation reverse time migration imaging method

A technology of reverse time migration imaging and wave equation, applied in seismic signal processing and other directions, can solve the problems of difficulty in repeated trials, weak fault tolerance, poor imaging quality, etc., and achieves fast computing speed, strong fault tolerance, and reduced storage capacity. Effect

Inactive Publication Date: 2012-07-11
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0008] Aiming at the defects of the prior art, the present invention discloses a massive data GPU wave equation reverse time migration imaging method, which not only overcomes the unavoidable difficulties of the traditional reverse time migration method in processing massive data applications, such as calculation cycle It is to

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  • Mass data GPU (graphics processing unit) wave equation reverse time migration imaging method

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[0035] The inventive spirit of the present invention can be better understood with reference to the accompanying drawings and specific implementations, and those skilled in the art can understand that the specific implementations provided are only preferred rather than limited to this implementation. Changes made by those skilled in the art on the basis of understanding the technical solutions of the present invention, such as the use of different GPUs, changes in the number of CPU core thread groups, etc., still belong to the protection scope of the present invention, and the protection of the present invention covers its claims and rights The required equivalent transformation.

[0036] In the following embodiments, the GPU model used is Tesla C1060 produced by NVIDIA Corporation, and the following method is applicable to all CUDA-supporting GPUs released after Tesla C1060. Those skilled in the art can expect to use other general-purpose computing solution platforms to reali...

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Abstract

The invention discloses a mass data GPU (graphics processing unit) wave equation reverse time migration imaging method. The overall steps of the reverse time migration involves three modules, including a data distribution module, a reverse time migration module and a real-time data merging module, with the data distribution module, single shot data are assigned to the different GPU nodes; with the reverse time migration module, the single shot data are calculated for imaging to output an imaging file; with the real-time data merging module, the imaging file is scanned in real time and is subjected to statistic classification, the number and size of the information files required by a user are calculated, and the user is notified about how much time the user needs to complete the data merging in the form of percentage. In the mass data GPU inverse wave equation migration imaging method of the invention, the three modules can run independently in parallel, and are more suitable for massdata reverse time migration implementation, so that the computing efficiency is high, the computing speed is fast, fault-tolerant capability is high, and the problem of insufficient GPU memory for the mass imaging can be effectively overcome.

Description

technical field [0001] The invention relates to a massive data GPU wave equation reverse time migration imaging method, which is applied in petroleum exploration, natural gas exploration, coal field exploration, mineral exploration and the like, and belongs to the field of seismic exploration and development. Background technique [0002] With the continuous deepening of oil and gas field exploration, the exploration of pre-salt oil and gas reservoirs has attracted more and more attention. Traditional migration methods cannot delineate the boundaries of salt domes and image sub-salt structures. Reverse time migration (RTM) uses a two-way wave equation, which can accurately describe the wave propagation process. Accurate imaging of steep dip angles and inversion structures, and imaging of complex geological structures using current limited migration methods. [0003] Reverse time migration technology, as a solution to seismic imaging problems under complex conditions, can ov...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 李博
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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