Time domain full-waveform inversion method based on amplitude increment coding

A full-waveform inversion, time-domain technology, used in measurement devices, geophysical measurements, instruments, etc., can solve problems such as poor calculation stability, and achieve the effects of reducing dependence, alleviating cycle jumps, and increasing calculation time.

Inactive Publication Date: 2020-06-05
JILIN UNIV
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method has the problems of relying on the assistance of other technical means and poor calculation stability, and has some shortcomings in calculation efficiency or inversion results

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 full-waveform inversion method based on amplitude increment coding
  • Time domain full-waveform inversion method based on amplitude increment coding
  • Time domain full-waveform inversion method based on amplitude increment coding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] According to the exploration requirements, Parallel Computing Toolbox and MATLAB Distributed Computing Server (R2016b) were installed under the Windows 10 Professional Edition system to build the MATLAB parallel platform.

[0093] Full waveform inversion test with missing low frequency information using Marmousi. real model ( Figure 4 ) and a linearly increasing initial model ( Figure 5 ).

[0094] Table 1. Full waveform inversion test parameters with missing low frequency information

[0095] grid size grid distance Line length vertical depth Bandwidth 69×192 12.5m 2400m 862.5m full band

[0096] The grid size of the model is 69×192, the grid spacing is 12.5, the lateral distance is 2400m, and the vertical depth is 862.5m. The seismic wave velocity ranges from 1500m / s to 4000m / s in the model. The grid point is a geophone, and the interval between the geophones is 12.5m, and a total of 12 seismic sources are excited. The source of t...

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 provides a time domain full-waveform inversion method based on amplitude increment coding, and the method comprises the steps: carrying out the amplitude increment coding of each sampling point of analog data and observation data, adding the amplitude polarity as a constraint, selecting data with different amplitude increments at the same time point, and the data causing the periodicjump; after encoding, constructing a zero-setting matrix, the matrix being multiplied by analog data so as to set the data causing cycle skipping to be zero, and then reducing the influence of the data on the gradient is reduced. And after one part of data is set to be zero, the amplitude information of the original data is destroyed. In order to reduce the dependence of inversion on amplitude information and highlight the effect of phase information, a global cross-correlation objective function is adopted. Compared with a traditional full-waveform inversion method, the difference between the method and the traditional full-waveform inversion method only lies in encoding calculation and zero setting calculation of analog data and observation data, encoding calculation is only simple matrix addition, subtraction, multiplication and division, and the calculation time of full-waveform inversion cannot be obviously prolonged. Compared with the traditional full waveform inversion, the method has the advantage that the calculation efficiency is not reduced.

Description

technical field [0001] The invention relates to a seismic exploration imaging method, in particular to a time domain full waveform inversion method based on amplitude incremental coding. Background technique [0002] With the increasing demand for oil and mineral resources in the country's economic construction, the focus of mining and oil exploration has gradually shifted to the deep, and efforts have been made to find out the mineral resources in the second depth space, which poses a challenge to the accuracy of seismic inversion imaging. higher requirement. Aiming at this problem, constructing the seismic wave velocity field of the target area with active source full waveform inversion method is a good solution at present. The full waveform inversion method makes full use of the kinematics and dynamics information of seismic waves in the process of recovering the subsurface velocity field. It has the advantages of high imaging precision for complex structures, and can we...

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): G01V1/28G01V1/30
CPCG01V1/282G01V1/303G01V2210/6222
Inventor 董士琦韩立国张盼陈瑞鼎尹语晨
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap