Unlock instant, AI-driven research and patent intelligence for your innovation.

Time domain multi-scale full waveform inversion method and system

A full waveform inversion and multi-scale technology, applied in the field of seismic exploration, can solve the problem of high calculation cost, achieve the effect of enhancing noise resistance, improving convergence speed and calculation efficiency

Inactive Publication Date: 2020-05-29
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inexact linear search method guarantees a small number of function estimates, but the search process usually requires multiple additional forward calculations, and the calculation cost is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Time domain multi-scale full waveform inversion method and system
  • Time domain multi-scale full waveform inversion method and system
  • Time domain multi-scale full waveform inversion method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0145] As an implementation manner, the first velocity model determination unit of the present invention includes:

[0146] The first simulated wave field data determination subunit is used to calculate the simulated wave field data corresponding to the initial velocity model;

[0147] an objective function construction subunit, configured to construct an objective function based on the simulated wavefield data and the seismic observation data;

[0148] Gradient determination subunit, used to calculate the gradient of the objective function by using the adjoint state method;

[0149] a search direction determining subunit, configured to determine the search direction of the objective function according to the gradient;

[0150] An optimal step size determination subunit, configured to determine the optimal step size of the objective function;

[0151] A velocity model determination subunit for the next iteration, configured to determine a velocity model for the next iteratio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a time domain multi-scale full waveform inversion method and system. The method comprises steps of S1, acquiring seismic observation data by using a detector; S2, determining an initial velocity model by using a tomography method; S3, filtering seismic observation data to different frequency bands by using a Wiener low-pass filter; S4, determining an optimal speed model according to the initial speed model and the seismic observation data of different frequency bands; and S5, performing seismic imaging based on the optimal speed model, improving the convergence rate andthe calculation efficiency of full-waveform inversion, and enhancing the noise immunity of inversion.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a time domain multi-scale full waveform inversion method and system. Background technique [0002] With the rapid development of social industry, the demand for resources continues to increase. Therefore, for areas with thick overburden layers, severe undulating terrain (steep mountains), and complex underground geological structures (development of underground faults, broken structures, serious formation deformation, and complex lithology) The demand for deep resource exploration is getting stronger and stronger. Seismic exploration is a systematic project. Whether seismic methods can be successfully used in resource exploration depends largely on seismic data processing technology. Seismic imaging is the core link in seismic data processing, and it is the concentrated expression of the final results and benefits. With the development of computer hardware, seismic ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36G01V1/28G01V1/30
CPCG01V1/282G01V1/307G01V1/36G01V2210/6222
Inventor 马晓娜梁光河秦克章李志远
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI