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

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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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 too long, has weak fault tolerance, and is not easy to repeat trials, etc., and also overcomes the poor imaging quality and computational efficiency caused by the use of GPU in recent years to use random boundary conditions to replace calculations with storage methods to achieve three-dimensional reverse time migration. low defect

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