Wave-equation reverse-time migration imaging method for mass-data graphic processing unit

Abstract

The invention relates to a wave-equation reverse-time migration imaging method for a mass-data graphic processing unit. The method includes a data distribution module which distributes single-shot data to different graphic-processing-unit nodes; a reverse-time migration module which performs calculation imaging on the single-shot data and outputs an imaging file; a real-time data combination module which scans the imaging file in a real-time manner and performs statistics and classification and calculates the number and size of information files needed by a user and notifies the user how much time is needed to complete the data combination in a percentage form. Through the method, parallel calculation through the graphic processing unit is realized through calculation of dense wave-field spread, border conditions and imaging.

Description

technical field [0001] The invention relates to the field of seismic exploration and development, and is applied in petroleum exploration, natural gas exploration, coal field exploration, mineral exploration, etc., and particularly relates to a massive data GPU wave equation reverse time migration imaging method. 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, ca...

AI Technical Summary

Problems solved by technology

In the specific implementation process, problems will be encountered: unbalanced parallel load, long calculation cycle and low efficiency, heavy noise caused by the use of random boundary conditions, reasonable use and reuse of calculation results, insufficient convenient user analysis methods, etc.

[0009] 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

Images