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FCT-FDM forward simulation method based on dispersion viscosity wave equation

A FCT-FDM, wave equation technology, applied in seismic wave forward modeling, FCT-FDM forward modeling field based on dispersion-viscous wave equation, can solve the influence of not considering the effect of diffusion flow, not considering the influence of inertial flow effect And other issues

Active Publication Date: 2015-06-24
XI AN JIAOTONG UNIV
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Problems solved by technology

On the other hand, the conventional diffusion equation does not consider the effect of inertial flow, and the conventional wave equation does not consider the effect of diffusive flow

Method used

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  • FCT-FDM forward simulation method based on dispersion viscosity wave equation
  • FCT-FDM forward simulation method based on dispersion viscosity wave equation
  • FCT-FDM forward simulation method based on dispersion viscosity wave equation

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Embodiment Construction

[0060] Below in conjunction with accompanying drawing, the present invention will be described in further detail

[0061] The basis of the present invention is the propagation of seismic waves and its numerical simulation method. The present invention provides a FCT-FDM forward modeling method based on the dispersion viscous wave equation. The specific implementation steps are respectively:

[0062] 1) Establishment of medium model

[0063] The medium model established includes a geological model and a mathematical physical model. The geological model is established by geological personnel based on the actual geological background conditions. The medium model in this description is as follows: figure 1 Shown; And mathematical physics model The present invention relates to dispersion viscous wave equation, and combine the actual geological background, petrophysical experiment, logging and other data to provide the parameters of the established medium model, the model parameters...

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Abstract

The invention discloses an FCT-FDM forward simulation method based on a dispersion viscosity wave equation. A propagation characteristic of a dispersion viscosity wave is researched from the perspective of the numerical simulation. Calculating steps of FCT-FDM is stated, a fluid saturation model is designed, the method is utilized to simulate propagation of the dispersion viscosity wave, and comparing and analyzing are carried out on a numerical result and a sound wave simulation result. The result indicates that relative to a sound wave, the dispersion viscosity wave is obviously attenuated on the amplitude, and the phase position is notably changed. The attenuation degree of the dispersion viscosity wave mainly depends on a dispersion attenuation coefficient and a value of the dispersion attenuation coefficient. According to the FCT-FDM forward modeling method based on the dispersion viscosity wave equation, an effective tool is provided for the numerical simulation of a seismic wave, in particular to a medium containing fluid. The FCT-FDM forward modeling method based on the dispersion viscosity wave equation can be used for describing the attenuation and the phase-shift characteristic of the seismic wave in the fluid medium. In addition, the method is easy to achieve, and the operability is high.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and relates to a seismic wave forward modeling method, in particular to an FCT-FDM forward modeling method based on a dispersion viscous wave equation. Background technique [0002] Seismic numerical simulation is based on the theory of seismic wave propagation in underground media, which has been widely used in both exploration earthquakes and natural earthquakes. Seismic wave simulation technology is the basis of geophysical data processing. It is a kind of seismic simulation that simulates the wave propagation law in the underground geological structure and obtains the seismic records of each observation point under the assumption that the underground geological structure and corresponding physical parameters are known. technology. Seismic wave simulation technology is of great significance in geophysical exploration. It is a powerful auxiliary tool for seismic data interpretation and p...

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Application Information

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IPC IPC(8): G06F19/00G01V1/50
Inventor 高静怀赵海霞
Owner XI AN JIAOTONG UNIV
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