Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Seismic wave decomposition method

A seismic wave and decomposed technology, applied in the fields of geophysical exploration and petroleum geophysical exploration, can solve problems such as slow calculation speed

Active Publication Date: 2011-07-06
CHINA PETROLEUM & CHEM CORP
View PDF0 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing seismic wave decomposition method using matching pursuit technology has problems: 1. Due to a large number of wavelet dictionaries, the calculation speed is very slow; 2. The scale σ is a fixed value, and the wavelet is a fixed length

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
  • Seismic wave decomposition method
  • Seismic wave decomposition method
  • Seismic wave decomposition method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The seismic wave decomposition method provided by the present invention will be further described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, according to an embodiment of the present invention, a seismic wave decomposition method is provided, including:

[0023] 1) Select the wavelet form, which is the Gabor wavelet form defined by formula (1):

[0024] g r ( t ) = w ( t - u σ ) exp [ i ( ω ( t - u ) ) + φ ] Formula 1),

[0025] Where g r (t) is the Gabor wavelet function, w(·) represents the Gaussian window function, u is the time shift, σ is the length of the time axis, ω is the center frequency, φ is the phase shift, and i is the imaginary unit; the wavelet form can be selected from A series of wavelets or wavelet atoms matching seismic signals are selected from the Gabor wavelet dictionary, discrete Dirac function, and discrete Fourier function based on comp...

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 relates to a seismic wave decomposition method which comprises the following steps: selecting a Gabor small wave or a Morlet small wave as a wavelet form; carrying out multiwavelet decomposition on an obtained seismic signal; calculating three parameters of the small wave, namely time shift u, center frequency Omega, phase shift Phi through the complex attribute of the seismic signal in each decomposition; calculating a time scale parameter Sigma according to the three parameters; estimating the amplitude Alpha of the small wave; and determining a final parameter through iteration and decomposing wavelets with different dominant frequencies. The seismic wave decomposition method improves the traditional matched tracking method and improves the calculation efficiency; and meanwhile, Sigma is self-adaptive and adjustable.

Description

Technical field [0001] The invention relates to the field of geophysical prospecting, and more particularly, to a seismic wave decomposition method in the field of petroleum geophysical prospecting. Background technique [0002] Seismic exploration technology is a geophysical exploration method that uses elastic vibration to study the elastic difference of different rocks in the formation to understand the distribution of the formation and the geological structure. It is mainly used in oil and natural gas exploration and development, mineral resources surveys, engineering geological surveys, etc. The field is also the most common and effective way to find oil storage traps in petroleum exploration. The underground information provided by the earthquake can not only effectively divide the trap range, but also study and judge the rock properties and fluid properties of the formation, and even extend to the description of reservoir characteristics. At present, there are a variety o...

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
IPC IPC(8): G01V1/28
Inventor 甘其刚许多唐建明徐天吉叶泰然程冰洁蒋能春蔡军兰
Owner CHINA PETROLEUM & CHEM CORP
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com