Seismic data abnormal amplitude suppressing method

A technology of abnormal amplitude and seismic data, applied in the field of abnormal amplitude suppression of seismic data, can solve the problem of incomplete suppression of abnormal amplitude, achieve the effect of meeting industrial production and improving signal-to-noise ratio

Active Publication Date: 2015-06-24
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of incomplete suppression of abnormal

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 data abnormal amplitude suppressing method
  • Seismic data abnormal amplitude suppressing method
  • Seismic data abnormal amplitude suppressing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0034] figure 1 It is a flowchart of a method for suppressing abnormal amplitude of seismic data provided by the present invention. Such as figure 1 As shown, the present invention provides a method for suppressing abnormal amplitudes of seismic data, the method comprising: S101, extracting time-domain signals of seismic data for time-frequency dual-domain decomposition, and analyzing the decomposed time-frequency spectrum to obtain that the abnormal amplitude is dominant frequency; S102, for any signal at the frequency where the abnormal amplitude is dominant, perform effective wave amplitude energy index analysis to find the effective wave amplitude area, an...

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 seismic data abnormal amplitude suppressing method. The method comprises the steps that seismic channel signals are extracted, and time and frequency double-domain decomposition is conducted; an effective wave amplitude region is found under each corresponding frequency according to effective wave amplitude distribution; the energy index of effective amplitude is calculated in the effective wave amplitude regions to serve as the average amplitude energy index; the energy index of a sampling point is calculated and compared with the average amplitude energy index, and the amplitude of the sampling point is classified as suspicious abnormal amplitude if the energy index of sampling point is larger than the average amplitude energy index; for the suspicious abnormal amplitude, subtraction is conducted on the energy index of the suspicious abnormal amplitude and the average amplitude energy index, the difference value is then compared with the average amplitude energy index, and the suspicious abnormal amplitude is an abnormal amplitude value if the comparison value is larger than a given valve value; the abnormal amplitude value is attenuated; time-frequency spectrum signals are reversely transformed into the time domain, and the suppression of the abnormal amplitude is completed. By means of the method, the problem that suppression of the abnormal amplitude is not thorough in a conventional method is solved, effective signals are protected, and the signal-to-noise ratio of seismic data is increased.

Description

technical field [0001] The invention relates to a digital signal processing method of seismic data, in particular to a method for suppressing abnormal amplitude of seismic data. Background technique [0002] In the field of seismic data processing, it is usually necessary to separate the abnormal amplitude from the significant wave amplitude. Abnormal amplitudes are usually characterized by randomness and strong amplitude, and the abnormal amplitude frequency band usually overlaps with the effective wave frequency band to a large extent, which makes the problem of suppressing the abnormal amplitude while protecting the effective signal very difficult, and there is still no conventional method to solve the abnormal The problem of incomplete amplitude suppression. Contents of the invention [0003] The object of the present invention is to overcome the problem of incomplete suppression of abnormal amplitude by conventional methods, and to provide a method for suppressing ab...

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): G01V1/36
Inventor 胡治权王金龙张虹唐建明孔选林马昭军徐天吉李曙光丁蔚楠姜镭胡斌
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
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