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Wave field forward modeling method and device

A forward simulation and wave field technology, applied in the field of data processing, can solve problems such as strong numerical dispersion and complex objective functions, and achieve the effect of reducing numerical dispersion

Inactive Publication Date: 2019-03-19
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The embodiment of the present invention provides a wave field forward modeling method to solve the technical problems in the prior art that the objective function is complex in the optimization process of the finite difference operator and the strong numerical dispersion exists in the seismic wave field forward modeling

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  • Wave field forward modeling method and device
  • Wave field forward modeling method and device

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0026] In an embodiment of the present invention, a wavefield forward modeling method is provided, such as figure 1 As shown, the method includes:

[0027] Step 101: Obtain a window function, wherein the window function includes a finite difference coefficient and an adjustment coefficient;

[0028] Step 102: Create an objective function according to the maximum norm principle and the window function;

[0029] Step 103: solving the objective function to obtain the solution of the finite difference coefficient and the solution of the adjustment coefficient;

[0030] Step 104: Substituting the...

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Abstract

The embodiment of the invention provides a wave field forward modeling method and device. The method includes the steps of acquiring a window function, wherein the window function includes a finite difference coefficient and a trimming coefficient; according to a maximum norm principle and the window function, creating an objective function; solving the objective function, and obtaining a solutionof the finite difference coefficient and a solution of the trimming coefficient; substituting the optimal solution into the window function; using the window function to obtain an optimized uniform grid finite difference operator; performing the wave field forward modeling by using the optimized uniform finite difference operator. The method optimizes the coefficients to be optimized in the objective function. For the first time, the uniform grid finite difference operator can be optimized by combining the window function and the objective function, and the optimized uniform grid finite difference operator performing the wave field forward modeling is beneficial to reducing the numerical dispersion.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a wave field forward modeling simulation method and device. Background technique [0002] Seismic wavefield forward modeling based on finite difference format has been widely used in reverse time migration. Both full-wave inversion and reverse time migration require multiple forward modeling and wavefield backpropagation. Therefore, forward modeling Accuracy and speed are very important considerations, which have great significance for imaging and inversion. Many scholars have done extensive research on the finite difference scheme of the wave equation. To reduce numerical dispersion, various finite difference schemes have been developed, such as variable grid, irregular grid, staggered grid, and rotated staggered grid, etc. [0003] However, the classical coefficients of higher-order finite-difference operators on spatial derivatives are usually determined by the Taylo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/303G01V2210/6222
Inventor 王建刘洪桂生冯海新
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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