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Fractured medium seismic wave field numerical simulation method based on multiple machines and multiple cores

A numerical simulation and seismic wave field technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problem of inability to effectively analyze the response characteristics of seismic wave field, and achieve the effect of improving calculation speed and acceleration ratio.

Inactive Publication Date: 2017-12-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

Although the use of the equivalent medium theory simplifies the complexity of the numerical simulation of the seismic wave field in fractured media, the numerical simulation results can only obtain the response characteristics of the seismic wave field at the boundary of the geological body with fractures, and cannot effectively analyze the effects of different shapes and sizes of fractures on the seismic wave field. Response characteristics cannot effectively guide the fine prediction and description of subsequent fractured reservoirs

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  • Fractured medium seismic wave field numerical simulation method based on multiple machines and multiple cores
  • Fractured medium seismic wave field numerical simulation method based on multiple machines and multiple cores
  • Fractured medium seismic wave field numerical simulation method based on multiple machines and multiple cores

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[0030] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0031] like figure 1 Shown is the program flow chart of the application, the technical program of the application is: based on multi-machine multi-core fracture medium seismic wave field numerical simulation method, including:

[0032] S1. According to the direction, shape, and volume of the fracture, find out the minimum fracture unit, and use grid subdivision technology to construct a geological model;

[0033] S2. Comprehensively considering the petrophysical properties of fractures and surrounding rock media in the fracture development area, according to the wave equation numerical simulation theory suitable for large lateral velocity changes, it is proposed to use the combination of phase shift correction and phase shift interpolation to con...

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Abstract

The invention discloses a fractured medium seismic wave field numerical simulation method based on multiple machines and multiple cores, which is applied to the field of fractured seismic wave field. By introducing cluster processing to wave equation numerical simulation and making an MPI message transfer interface work on multiple machines, a computer cluster can be used in finely-gridded fractured medium seismic wave field numerical simulation, and the computation speed is greatly improved. Moreover, through the use of multiple threads, the multiple cores of a single node are fully utilized, the memory and idle resources of the computer are fully utilized, and therefore, the speedup ratio of the algorithm is further enhanced.

Description

technical field [0001] The invention belongs to the field of fractured seismic wave fields, in particular to a fractured reservoir geological model. Background technique [0002] Fractured oil and gas reservoirs have become an important part of global oil and natural gas reserves and a key area for increasing reserves. The use of surface seismic data to predict fractured reservoirs has always been regarded as a challenging research content by geoscientists and reservoir engineers. One of the key issues involved is that it is difficult to identify the seismic wave field response characteristics of fractures with different shapes, densities, and sizes. In today's environment of low international oil prices, a clear understanding of the seismic wave field response characteristics generated by fractures is crucial to improving the prediction accuracy of fractured reservoirs and the success rate of drilling in fractured reservoirs. Numerical simulation of seismic wave field is a...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/282G01V2210/66
Inventor 蔡涵鹏左慧琴文传勇胡光岷
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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