Parallel computing-based three-dimensional anisotropic attenuation forward modeling method and system
A parallel computing and anisotropic technology, applied in the field of seismic exploration, can solve the problems of long computing time, increased forward modeling computing time, complex control factors of high-angle fractures, etc., to achieve the effect of improving efficiency
Pending Publication Date: 2022-01-21
CHINA UNIV OF GEOSCIENCES (BEIJING)
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[0002] The Sichuan Basin is an important area for natural gas exploration and development in China. The high-angle fractures in geological reservoirs are controlled by complex factors, which affect the physical properties of the reservoir and the recovery effect of the gas reservoir. Conventional post-stack wave impedance inversion technology is difficult to display lithologic heterogeneity and Identification of Fractured Thin Reservoirs
However, in order to meet the numerical simulation accuracy of thin layers in the simulation process, the 3D geological model needs to be divided into finer grids, and the number of 3D grid units increases exponentially, resulting in the spatial parameter The calculation time is too long when deriving, which greatly increases the calculation time of the forward simulation
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0036] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0037] The OpenMP parallel method uses a multi-core computer to achieve multi-thread parallelism by dividing tasks according to space, which can better utilize the multi-core resources of the computer. computing e...
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The invention relates to a parallel computing-based three-dimensional anisotropic attenuation forward modeling method and system. The method comprises the following steps: acquiring a three-dimensional geologic model, a seismic source type, a three-dimensional anisotropic attenuation wave equation and a three-dimensional three-component observation system; inputting the three-dimensional geologic model and the seismic source type into a three-dimensional anisotropic attenuation wave equation to obtain a first equation to be solved; wherein the medium velocity comprises propagation velocities in X, Y and Z directions; according to the first to-be-solved equation, calculating spatial derivatives of the propagation velocities in the X, Y and Z directions by adopting a Fourier pseudo-spectral method to obtain a second to-be-solved equation, and performing OpenMP parallel computing processing when the spatial derivatives of the propagation velocities in the X, Y and Z directions are calculated; solving the second to-be-solved equation to obtain a medium velocity; and according to the medium speed and the three-dimensional three-component observation system, obtaining a seismic shot record and a wave field snapshot. According to the method, the forward modeling efficiency can be improved under the condition that the numerical simulation precision is ensured.
Description
technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a three-dimensional anisotropic attenuation forward modeling method and system based on parallel computing. Background technique [0002] The Sichuan Basin is an important area for natural gas exploration and development in China. The high-angle fractures in geological reservoirs are controlled by complex factors, which affect the physical properties of the reservoir and the recovery effect of the gas reservoir. Conventional post-stack wave impedance inversion technology is difficult to display lithologic heterogeneity and Identify fractured thin reservoirs. Seismic waves propagate in fractured thin reservoirs, and the dispersion of wave velocity, energy attenuation, and corresponding azimuth change characteristics will be an important way for fluid identification and fracture parameter inversion. Studying the seismic response characteristics of seismic waves in frac...
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Login to View More IPC IPC(8): G01V1/28
CPCG01V1/282G01V2210/65
Inventor 杨春颖王赟
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)