PML boundary three-dimensional seismic wave propagation simulation method utilizing CUDA

A technology for propagating simulations and seismic waves, applied in seismic signal processing, etc., can solve problems such as large amount of calculation, time-consuming calculation, failure to meet the requirements of use, etc., and achieve the goal of improving calculation efficiency, reducing computer time and energy consumption, and high acceleration ratio Effect

Inactive Publication Date: 2015-10-28
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The conventional implementation of seismic wave simulation is to use the central processing unit (CPU) to calculate, but even with the help of parallel technologies such as OpenMP and MPI (multi-point interface), the calculation is still very time-consuming and cannot meet the requi...

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  • PML boundary three-dimensional seismic wave propagation simulation method utilizing CUDA
  • PML boundary three-dimensional seismic wave propagation simulation method utilizing CUDA
  • PML boundary three-dimensional seismic wave propagation simulation method utilizing CUDA

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[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the spirit of the disclosure of the present invention will be clearly described below with the accompanying drawings and detailed descriptions. Any person skilled in the art will understand the embodiments of the present invention. , when it can be changed and modified by the technology taught in the content of the present invention, it does not depart from the spirit and scope of the content of the present invention.

[0027] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention. In addition, elements / members with the same or similar numbers used in the drawings and embodiments are used to represent the same or similar parts.

[0028] As used herein, "first", "second", ... etc. do not refer to a particular sequence or order, nor are they used to limit the pre...

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Abstract

The present invention provides a PML (Perfectly Matched Layer) boundary three-dimensional seismic wave propagation simulation method utilizing CUDA (Compute Unified Device Architecture), comprising the steps of: reading in an initial parameter and a Ricker wavelet; decomposing a stress in a first acoustic wave fluctuation equation of a three-dimensional seismic wave into stress components in three directions which are mutually perpendicular, and adding a PML boundary condition to form a second acoustic wave fluctuation equation; using a finite difference method to discretize the second acoustic wave fluctuation equation, so as to form a finite difference acoustic wave fluctuation equation; bordering a first three-dimensional speed model to form a second three-dimensional speed model; calculating attenuation coefficients of edges, angles and surfaces of the second three-dimensional speed model in a CPU (Central Processing Unit) according to the finite difference acoustic wave fluctuation equation; calculating stresses of net points of the second three-dimensional speed model in a GPU (Graphics Processing Unit) according to the attenuation coefficients; and outputting a three-dimensional seismic wave simulation record at the last moment according to the stresses. The PML boundary three-dimensional seismic wave propagation simulation method of the present invention can achieve high speed-up ratio and shorten simulation time.

Description

technical field [0001] The present invention relates to seismic wave simulation technology, in particular to a three-dimensional GPU (Graphics Processing Unit) seismic wave propagation simulation technology with PML (Perfect Matching Layer) boundaries, specifically a CUDA (Compute Unified Device Architecture, computing unified device architecture) The PML Boundary 3D Seismic Wave Propagation Simulation Method. Background technique [0002] Seismic exploration is the upstream business of the oil industry, and has made significant contributions to the discovery of Shengli Oilfield, Dagang Oilfield and Huabei Oilfield. Nowadays, it is very necessary to develop a high-precision seismic exploration method under the situation that it is increasingly difficult to find oil reserves in Chinese territory of. [0003] Seismic exploration includes seismic acquisition and data processing. How to extract effective information from the collected data and then obtain the distribution of un...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 唐祥德刘洪
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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