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Parallel vector computing method of seismic acoustic wave equation

A wave equation and parallel computing technology, applied in seismology, geophysical measurement, seismic signal processing, etc., can solve problems such as cost and affect acceleration effect, and achieve the effect of high accuracy of calculation results, saving of calculation instructions, and efficient calculation.

Active Publication Date: 2019-03-19
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

The two characteristics of time-domain seismic forward modeling, that is, the order of iteration in the time dimension and the disorder in the space dimension, using traditional task-level parallelism will inevitably lead to time synchronization, simulation calculation task cutting, and surrounding local wave field Additional costs such as the transmission of information between nodes affect the acceleration effect

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  • Parallel vector computing method of seismic acoustic wave equation
  • Parallel vector computing method of seismic acoustic wave equation
  • Parallel vector computing method of seismic acoustic wave equation

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0050] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0051] The parallel calculation method of seismic acoustic wave equation vector of the present invention includes: using computer and numerical method to simulate the propagation process of seismic wave field in underground medium. First, the known geological structure information is provided, and then seismic forward modeling is used to predict the vibration that can be recorded by a set of geophones at a specific location in space.

[0052] Using CPU template ...

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Abstract

The invention belongs to the field of earth exploration and information technology, and particularly relates to a parallel vector computing method of seismic acoustic wave equation, which includes: (1) seismic simulation; simulating the propagation process of the seismic wave field in underground media by computers and numerical method, which includes the following steps: (2) calculation of parallel acceleration; parallelization requirement analysis of seismic simulation projects, replacement of the special parts, which are the most time-consuming in the serial code and can be replaced by vector calculation, by AVX instruction set parallel code. The parallel vector computing method of seismic acoustic wave equation can not only simulate the seismic response characteristics and variation rules of high density acquisition, but also greatly save calculation instructions, and finally realize the ability of about 3-7 times secondary acceleration ratio.

Description

technical field [0001] The invention belongs to the field of earth exploration and information technology, and in particular relates to a method for parallel calculation of seismic acoustic wave equation vectors. Background technique [0002] Wave equation forward modeling is the basic work of geophysical research. It serves all stages of seismic data acquisition, processing, and interpretation, and its importance is self-evident. But in general, large-scale earthquake forward modeling needs to consume a lot of computing resources, such as large computing time consumption and massive memory consumption. [0003] High-performance computing is an important engine to promote the advancement of seismic exploration technology. In recent years, the development of parallel computing technology has made it possible to realize fast and high-precision large-scale earthquake forward modeling. On the one hand, message-passing MPI parallelism for distributed storage systems and OpenMP ...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 刘文革邓小江王凡尹成程莉莉
Owner SOUTHWEST PETROLEUM UNIV
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