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

Construction Method of Time-varying Earthquake Attenuation Model

A technology of attenuation model and construction method, applied in the field of geophysical signal analysis

Active Publication Date: 2022-04-08
王仰华
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is aimed at the defects of the existing seismic data attenuation model estimation methods, including the defects in the estimation of the average attenuation coefficient and the defects in the estimation of the interlayer attenuation coefficient

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
  • Construction Method of Time-varying Earthquake Attenuation Model
  • Construction Method of Time-varying Earthquake Attenuation Model
  • Construction Method of Time-varying Earthquake Attenuation Model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The construction method of the time-varying seismic attenuation model of the present invention is a brand-new method for estimating the interlayer attenuation coefficient according to the Wang's wavelet variation characteristics proposed on the basis of physical principles, and constructs a stable time-varying Earthquake attenuation model. One of the outstanding advantages of the present invention is that it proposes a brand-new method for estimating the seismic attenuation coefficient according to the Wang's wavelet variation characteristics based on physical principles. Another outstanding advantage is that it proposes to construct a stable time-varying seismic attenuation model by constraining the inversion of different wavelength coefficients of the attenuation model. The implementation steps are: (1) generate the time-frequency spectrum of seismic data, and estimate the basic statistical characteristics of the power spectrum in each time window; (2) estimate the Wa...

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 present invention relates to a construction method of a time-varying seismic attenuation model, which is proposed based on physical principles to estimate the interlayer attenuation coefficient according to Wang's wavelet variation characteristics in order to solve the instability problem of the existing method in the application of actual seismic data A new method, by constraining the different wavelength coefficients of the inversion seismic attenuation model, constructs a stable time-varying seismic attenuation model. The implementation steps are: (1) Generate the time spectrum of seismic data, and estimate the basic statistical characteristics of the power spectrum of each time window; (2) Estimation of Wang's generalized wavelet parameters; (3) Estimation of the seismic attenuation coefficient of each time window; (4) Set the Fourier series to fit the time-varying seismic attenuation model; (5) Constrain the Fourier coefficients of the inversion attenuation model to construct a time-varying seismic attenuation model. The invention has the advantage of being able to construct a stable time-varying seismic attenuation model.

Description

technical field [0001] The invention relates to the field of geophysical signal analysis, in particular to a method for constructing a time-varying seismic attenuation model. Background technique [0002] Seismic attenuation coefficient can be divided into average attenuation coefficient and interlayer attenuation coefficient, interlayer attenuation coefficient is also called instantaneous attenuation coefficient. The inventor once proposed the method of estimating the average attenuation coefficient (Qanalysis on reflection seismic data, Geophysical Research Letters , vol:31 / 2004 / the inventor) namely "Q-analysis of reflection seismic data". The breakthrough point of this method is to use a combined variable, that is, the product of frequency and time as a single variable instead of two independent variables of frequency and time, and convert the two-dimensional time-spectrum into a single independent variable. one-dimensional function. With the help of this product varia...

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 Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 王仰华
Owner 王仰华