A globally optimized staggered grid finite difference forward modeling method and device

A staggered grid, finite difference technology, applied in the field of globally optimized staggered grid finite difference forward modeling, which can solve problems such as application limitations and poor flexibility
CN106842306BInactive Publication Date: 2019-03-01INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Publication Date
2019-03-01
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The embodiment of the invention provides a globally optimized staggered mesh finite-difference forward simulation method and device. The method comprises the steps that a staggered mesh finite-difference operator is obtained; a target function is established based on a maximized norm and is calculated to obtain a staggered mesh finite-difference decentralization coefficient for optimizing the staggered mesh finite-difference operator, wherein the staggered mesh finite-difference decentralization coefficient is calculated in the maximum wave number coverage range of the optimized staggered mesh finite-difference operator and under the maximum spectrum error margin of the optimized staggered mesh finite-difference operator; the calculated staggered mesh finite-difference decentralization coefficient is adopted to optimize the spatial staggered mesh finite-difference operator, and forward simulation of seismic waves is performed. By adopting the scheme, absolute spectrum errors of the optimized staggered mesh finite-difference operator are more flexibly controlled, numerical value frequency dispersion is more effectively constrained, and the seismic simulation precision is improved.
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Description

technical field

[0001] The invention relates to the technical field of seismic wave numerical simulation research, in particular to a globally optimized staggered grid finite difference forward modeling method and device. Background technique

[0002] Seismic wave forward modeling is to simulate the propagation process of seismic waves in the earth's medium, and to study the relationship between the propagation characteristics of seismic waves and the parameters of the earth's medium, so as to achieve the optimal approximation to the actual observed seismic records. Due to the extreme complexity of the actual earth medium, it is difficult to obtain the analytical solution of the seismic wave equation. Therefore, the seismic wave numerical simulation method is the main method and technology for people to correctly understand the propagation law of seismic waves and verify the correctness of various hypothetical earth models; It has an important theoretical guiding role and p...

Claims

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