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Seismic wave forward modeling method and device between two points

A seismic wave and forward modeling technology, applied in the field of seismic exploration, can solve problems such as the need to improve the accuracy of intersection points, and achieve the effect of improving the solution accuracy

Pending Publication Date: 2021-01-22
YANGTZE UNIVERSITY
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Problems solved by technology

Since the formation structure is not in the same trend, the determination of the intersection point is an important part of various researches, but the accuracy of the intersection point solved in the prior art still needs to be improved

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  • Seismic wave forward modeling method and device between two points
  • Seismic wave forward modeling method and device between two points
  • Seismic wave forward modeling method and device between two points

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[0037]In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0038]The representation of complex stratigraphic structure function can be obtained by cubic spline interpolation. The interface function of the j-th segment of the interface can be written as Equation 1:

[0039]zj(x)=S(xj)=ajx3+bjx2+cjx+dj (1)

[0040]Againstfigure 1 In the processing of the stratigraphic structure shown, the...

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Abstract

The invention discloses a seismic wave forward modeling method and device between two points. The method comprises the steps of simulating a ray path through employing an optimization ray tracing method according to the positions of a shot point and a detection point, and obtaining a nonlinear equation set of coordinates of an intersection point, determining a minimized parameter range of the nonlinear equation set by utilizing a simulated annealing method, taking the minimized parameter range as an initial solution of an improved Newton method phase, and solving the nonlinear equation set, and determining intersection point coordinates according to the solution of the nonlinear equation set, and conducting seismic wave forward modeling. According to the method, a simulated annealing method is introduced to determine a global minimized parameter range, and then an improved Newton method is utilized to convert a nonlinear equation set into a linear equation for solving starting from theparameter ranges, so that the solving precision of different stratum intersection points of seismic waves is improved.

Description

Technical field[0001]The invention belongs to the field of seismic exploration technology, and specifically relates to a method and device for forward modeling of seismic waves between two points.Background technique[0002]Geophysical models can be divided into structural models and velocity models. Structural models mainly describe the occurrence of strata; velocity models are mainly used for pre-stack depth migration and time-depth transformation of seismic data. The structural model can have a very obvious layer-to-layer velocity interface. The stratum structure is divided into multiple layers, and the propagation velocity on each layer is different. In the process of seismic exploration data processing, the stratum structure is analyzed and processed, and the path trajectory that takes the shortest time to pass through the multilayer stratum structure from a shot point to a detection point is found.[0003]In recent years of domestic and foreign research, the most consideration is ...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/284
Inventor 王文松孙祥娥
Owner YANGTZE UNIVERSITY
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