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An Efficient Time Domain Full Waveform Inversion Method

A full waveform inversion and time-domain technology, applied in seismic signal processing, etc., can solve problems such as limiting GPU parallel efficiency, achieve the effects of reducing the number of simulations, improving computing efficiency, and reducing input and output

Active Publication Date: 2018-01-16
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

Moussa (2009) used GPUPU to study reverse time migration and showed that 91% of the running time is used for data transfer between CPU memory and GPU memory. This is because the source wave field at each time needs to be stored on the hard disk, which limits the parallelism of the GPU. due to efficiency

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  • An Efficient Time Domain Full Waveform Inversion Method
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  • An Efficient Time Domain Full Waveform Inversion Method

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0051] The invention provides an efficient time-domain wave equation full waveform inversion method based on seismic source phase encoding and multi-GPU parallel computing technology without data I / O, and provides an efficient processing means for high-precision velocity modeling of large-scale data.

[0052] Such as figure 1 Shown, the inventive method comprises:

[0053] The first step is to use random source polarity, random source location, and random source number three random schemes to randomly form super-shot sets of different frequency bands on the original observed seismic records;

[0054] details as follows:

[0055] MPI is used to input the original single-shot record and the original Reich wavelet in parallel, and the Wiener filter is used to filter the original single-shot record and the original Reich wavelet to obtain seismic single-shot records and...

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Abstract

The invention provides an efficient time-domain full waveform inversion method, which belongs to the field of high-efficiency, low-storage, and high-precision velocity modeling of petroleum seismic exploration data. The first step is to use the three-random scheme of random source polarity, random source position and random number of sources to randomly form super-shot sets of different frequency bands on the original observation seismic records; the second step is to use CUDA-based multi-GPU parallel computing technology to accelerate the time domain The high-order staggered grid finite difference forward simulation of the first-order form of the acoustic wave equation system and the elastic wave equation system obtains the ifreq frequency band super shot set of the GPU simulation; the CPU and GPU collaborative technology is used in the forward simulation, and multi-GPU cores are used Simulate the propagation of different seismic sources, and store the boundary data of the source wave field and all wave fields at the last moment in the computer memory.

Description

technical field [0001] The invention belongs to the field of high-efficiency, low-storage, and high-precision velocity modeling of petroleum seismic exploration data, and specifically relates to an efficient time-domain full-waveform inversion method, aiming at the huge amount of calculation and massive amount required for time-domain full-wave field velocity modeling For storage problems, high-efficiency, high-resolution speed modeling is accomplished by using seismic source coding, parallel computing technology strategies combined with multiple GPUs, and effective boundary storage strategies without data I / O. Background technique [0002] Using pre-stack seismic wave data kinematics and dynamics information, full waveform inversion has the ability to reveal geological structures and lithological parameters under complex geological conditions, and is currently considered to be the most accurate velocity modeling technology. However, the realization of 3D full waveform inver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 王杰王立歆方伍宝胡光辉孙晶梅王振宇尹力
Owner CHINA PETROLEUM & CHEM CORP
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